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  • 1.
    Mulder, Roos
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Morshed, Mohammad Neaz
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Norén, Ulrika
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Niit, Ellinor
    Imogo AB, 216 16 Limhamn, Sweden.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Study on hydraulic spray atomizing system as a new resource-efficient dyeing-finishing method for wool fabric2022Ingår i: Scientific Reports, E-ISSN 2045-2322, Vol. 12, nr 1, artikel-id 21814Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study introduces hydraulic spray (HS) atomizing system as new resource-efficient continuous dyeing-finishing method for wool fabric. Here, wool fabric was dyed and finished by using commercial dyes and finishes through either one-step or two-steps HS method. Results obtained from color strength (K/S), color difference (ΔECMC) and color fastness analysis presented the apprehension of HS method in dyeing of wool fabric with different GSM and dyes. Finishing performance of wool fabric was measured through water contact angle analysis. Analysis shows that, the finishing performance of HS method were substantial to reach water contact angle as high as 145° while maintaining high fastness to wash and abrasion. Between one-step and two-steps HS method, one-step method showed better performance with high resource efficiency compared to two-steps method. Results from statistical analysis shows no statistical significance of fabric weight, type of dyes, and finishes to the performance of new HS method which is crucial for true-scale industrial implementation and scaling up of this process. The findings of this report are of great importance as it presents a greener alternative to the conventional resource-intensive dyeing-finishing methods of wool fabric.

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    fulltext
  • 2.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Effect of physical parameters and temperature on the piezo-electric jetting behaviour of UV-curable photochromic inks2020Ingår i: Scientific Reports, E-ISSN 2045-2322, Vol. 10, s. 18841-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Although resource-efficient processes like inkjet printing have a large potential to foster the development of smart and functional textiles, one bottleneck still is the development of functional inks. To make inkjet printing and UV curing given production techniques for smart and functional specialty products, e.g. photochromic textiles, deepened knowledge about the development, rheological behavior and jetting behavior of functional ink is needed. This paper focuses on the formulation and performance of UV-responsive and UV-curable inkjet inks, which are based on photochromic dyes and their application to produce UV-responsive textiles. Two commercial photochromic dyes—Reversacol Ruby Red (RR) and Sea Green (SG), which represent dyes of the naphthopyran and spirooxazine class, respectively, have been used to develop the inks. The photochromic inks are characterized according to their physical–chemical and rheological properties in respect to temperature. The influence of temperature on the drop formation of the inks in an industrial print head is analyzed using a high-speed camera, which reveals important information regarding challenges in ink jettability. It was found that the dye structure and type used in the ink can influence the jetting behavior of photochromic UV-curable ink. More pronounced temperature sensitivity of dyes can increase the temperature-related effects of drop formation as was observed for SG ink. The printability of the RR and SG inks is framed and underpinned by theoretical calculations of the Z number. Discrepancies are observed and discussed between existing theory of ink jettability and visual evaluation of the photochromic ink.

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    fulltext
  • 3.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ink Jetting of Photochromic Ink: Towards the Design of a Smart Textile Sensor2020Doktorsavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    Smart textiles have been a hot topic in research for several decades; however, comparatively few products can be found on the market. Resource-efficient processes can boost the breakthrough of smart and functional textiles, which often necessitate high-cost materials and only require small batches.

    This thesis provides a technology-driven approach with resource-efficient solutions for the production of UV-sensing textiles, while pointing out the challenges of the new materials, which are created when novel production processes are used. The performance of UV-sensing textiles produced by ink jetting and UV curing of ink with commercial photochromic dyes is primarily explored. Several steps in the development of a UV-sensing textile are covered in thesis; development and jetting performance of the photochromic UV-curable inkjet ink, optimization of the color performance of photochromic prints using production process parameters by tuning color kinetics, and evaluation of the durability and textile character of photochromic textiles. Other focuses included in the thesis are dyeing of photochromic textiles with supercritical carbon dioxide (scCO2), novel ways of stabilizing photochromic prints and ink jetting of functional ink for sports and work wear.

    It was shown that physical properties of the ink and temperature affected the jetting behavior of the ink. A discrepancy between the drop formation of UV-curable photochromic ink and existing models for jetting of inkjet ink was highlighted. Reversibly color-changing textiles can be produced with inkjet printing and UV curing of photochromic inks. The combination of the resource-efficient processes with the photochromic material required the introduction of an extended kinetic model to describe the coloration reaction of prints. An essential finding was that the kinetics of photochromic dyes in UV-curable ink applied on polyester fabric could be tuned using fabrication parameters during printing and curing in a continuous resource-efficient production process. By changing fabrication parameters during production, the prints’ crosslinking density is influenced and hence dye kinetics can be modified as a result of matrix rigidity of the UV ink. Furthermore, fabrication parameters influence and can be used to improve print durability as of abrasion and washing. Also, printing with photochromic UV-curable ink did not affect the fabric properties significantly in regards to flexibility and surface morphology. With the results obtained, photochromic textiles can be produced resource-efficiently using inkjet printing and UV curing, as well as scCO2 dyeing to boost the cost-effective and flexible production of smart textile UV sensors.

    Ladda ner fulltext (pdf)
    fulltext
    Ladda ner (pdf)
    omslag
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    spikblad
  • 4.
    Tadesse Abate, Molla
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Vikova, Martina
    Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 461 17, Liberec, Czech Republic.
    Vik, Michal
    Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 461 17, Liberec, Czech Republic.
    Ferri, Ada
    Department of Applied Science and Technology, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129, Torino, Italy.
    Guan, Jinping
    College of Textile and Clothing Engineering, Soochow University, 215006, Suzhou, Jiangsu, China.
    Chen, Guoqiang
    College of Textile and Clothing Engineering, Soochow University, 215006, Suzhou, Jiangsu, China.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Supercritical CO2 dyeing of polyester fabric with photochromic dyes to fabricate UV sensing smart textiles2020Ingår i: Dyes and pigments, ISSN 0143-7208, E-ISSN 1873-3743, Vol. 183Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Photochromic molecules are well-established colourants in the manufacturing of niche products, providing reversible colour change effects when irradiated with ultraviolet (UV) light. The high material cost of such speciality dyes along with the general high carbon footprint and extensive water consumption of textile products necessitates resource-efficient production processes. The use of supercritical CO2 (scCO(2)) dyeing technique enables the economic production of textile high-end products, where a uniform through colouration is desired. This study investigates the potential application of two commercial photochromic dyes based on spirooxazine (Sea Green - SO-SG) and naphthopyran (Ruby Red - NP-RR) to polyester fabric using scCO(2) dyeing technique and examines their photochromic behaviour. The dyeing was carried out at 120 degrees C and 25 MPa for 1 h. The photochromic performance was evaluated using a specially designed online colour measurement system capable of simultaneous UV irradiation and continuous measurement of photochromic colour change even after the shutdown of the UV source. The colour yields (K/S values), photoswitching rates and durability against washing were the main parameters examined. The results showed that scCO(2) dyed photochromic polyester fabrics exhibited reversible colour changing properties upon UV exposure and removal. The samples dyed with SO-SG demonstrated a comparable degree of photo-colouration, lower background colour, faster colouration and decolouration speeds, but inferior wash fastness compared with NP-RR dyed samples. Particularly, the same class of dyes applied by scCO(2) dyeing showed faster fading rates compared with conventionally dyed and screen printed samples. This study shows that scCO(2) dyeing method is a potential alternative to develop uniformly coloured photochromic textiles providing excellent photochromic performance with additional economic and environmental benefits.

  • 5.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Viková, Martina
    Technical University of Liberec.
    Vik, Michal
    Technical University of Liberec.
    Koldinská, Marie
    Technical University of Liberec.
    Havelka, Antonin
    Technical University of Liberec.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Color performance, durability and handle of inkjet-printed and UV-cured photochromic textiles for multi-colored applications2019Ingår i: Fibers And Polymers, ISSN 1229-9197, E-ISSN 1875-0052, Vol. 20Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The development and design of novel functional and smart textile materials such as textile sensors and multicolored systems based on photochromic dyes necessitate controls of color intensities, switching speeds, and material durability. Precise control and synchronization of dye kinetics are important for multi-colored photochromic applications especially. However, durability towards abrasion and washing should not be compromised on if we aim to design reliable future textile products. In this study, two different commercial photochromic dyes — a naphthopyran and a spirooxazine-based dye — have been applied on PET fabric by inkjet printing and UV-LED curing. The photochromic textiles’ color behavior, fastness to abrasion and washing, and handle are evaluated using spectrophotometry, scanning electron microscopy, and Kawabata evaluation system. Despite a decrease in color performance after washing, the photochromic inkjet print is effective and barely influences the textile structure. Reduced rigidity of the host matrix promoted higher color yields and faster dye kinetics, but also improved durability towards abrasion and washing. In order to synchronize kinetics of the different dye types for multi-colored applications, distinct curing conditions are preferable, which, however, result in varying print durability. In the design of multi-colored photochromic textiles, dye kinetics, and durability have to be balanced.

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    fulltext
  • 6.
    Tadesse Abate, Molla
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Viková, M
    Department of Material Engineering; Faculty of Textile Engineering; Technical University of Liberec.
    Vik, M
    Department of Material Engineering; Faculty of Textile Engineering; Technical University of Liberec.
    Ferri, A
    3 Department of Applied Science and Technology, Politecnico di Torino.
    Jinping, G
    College of Textile and Clothing Engineering, Soochow University.
    Chen, G
    College of Textile and Clothing Engineering, Soochow University.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Comparison of the photochromic behaviour of dyes in solution and on polyester fabric applied by supercritical carbon dioxide2019Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Photochromic textiles are of considerable interest for smart and functional textile applications due to their remarkable dynamic colour changing effect when irradiated with light of a certain wavelength. The use of resource efficient processes, such as digital inkjet printing and supercritical carbon dioxide (scCO2) dyeing techniques enables an economic production of those high-end functional products with high material costs. In this study, photochromic polyester fabric has been prepared by applying two commercially important photochromic dyes from spirooxazine (SO) and naphthopyran (NP) dye classes using scCO2-dyeing technique. The properties of scCO2 dyed photochromic fabrics were compared with the properties of the same dyes in a non-polar solvent, hexane. UV-Vis spectroscopy and a specially designed online colour measurement system capable of simultaneous UV irradiation and colour measurement were used to evaluate the photochromic colour behaviour. Both photochromic dye types embedded in textile as well as in solution showed significant reversible colour changing properties when exposed to UV light and revert to their original non-coloured form when the UV light is removed. The scCO2 dyed polyester fabrics exhibited similar trends of colour build-up as in solution, while contrasting behaviour was observed in terms of colour changing rates compared to their behaviour in solution.

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  • 7.
    Mahon, Kathleen
    et al.
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Dentler, Sigrid
    Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nurturing professional growth among new academics2019Ingår i: Teaching in Higher Education, ISSN 1356-2517, E-ISSN 1470-1294, s. 1-16Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The complexity and challenges of higher education (HE) in recent times have been widely discussed in HE literature, as have concomitant demands on university teachers and their professional learning needs. Much attention has been paid to new academics in these conversations, but less so to international PhD and post-doctoral researchers, who are often asked to teach, yet can be precluded from attending foundational pedagogical courses. This paper discusses an interpretive-hermeneutic study based on a pedagogical course developed for new academics in this very situation. Our discussion focuses on professional growth experienced by the course participants in terms of pedagogical understanding and self-confidence, and what enabled that growth from the participants’ perspectives. On the basis of analysis of interviews, questionnaires and qualitative course evaluations, we consider the value of such purpose-built courses and offer insights into what may need to be considered by course developers to ensure that their impact is optimal.

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    fulltext
  • 8.
    Malm, Veronica
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. University of Borås.
    Tadesse Abate, Molla
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Supercritical Carbon Dioxide: A Sustainable Medium For Textile Dyeing And Finishing To Expand The Possibilities For A Resource Efficient Production Technology2019Ingår i: Autex 19th World Textile Conference: Textiles at the Crossroads, 2019, 2019Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    In our research group focusing on resource efficient processes, we explore the waterless supercritical carbon dioxide (SC-CO2) technology as a promising sustainable alternative to the traditional textile wet dyeing and water based finishing processes. Already, it is industrially implemented for textile dyeing, in particular for synthetic fabrics, and, being a dry color process it is regarded as only using ¼ of the physical footprint compared to conventional dyeing. This, does not only account for water and energy savings, but also includes advantages such as reduced emissions of harmful effluents, less amount of used dye, no or minimal use of auxiliaries (dispersing agents, carriers and surfactants) and low waste of material. To expand the industrial capabilities of this technology and open up for new business opportunities, our research focuses on textile functionalization in SC-CO2, either by only applying a functional material or to combine dyeing and functionalization of fabric in a single-step process. For polyethylene terephthalate (PET) fabric dyeing (step 1) and functionalization (step 2) in a sequential process where similar processing parameters (high temperature and pressure) was used, it was found that the color was extracted in the second step. The PET dyeing kinetics using SC-CO2 as a solvent depend on the transition in the amorphous regions of the fiber and diffusion properties and solvating power of the SC-CO2 with the dye. Hence, extensive studies on compatibility between fiber, dye and functional compounds include solubility of dye and functional material in SC-CO2, optimization of process parameters (pressure and temperature) and depressurization. This is crucial for understanding the adhesion mechanism between fiber and chemicals, and, particularly for a proper adhesion with a durable functional performance. Furthermore, as SC-CO2 is a good solvent for hydrophobic compounds, nonionics and organic compounds with low molecules weight, there are challenges in modifying conventional compound or using co-solvents. Activities within this domain in our research group stretch between dyeing and functionalization of textiles with end-use properties such as antimicrobial, photochromic, moisture management, water repellency, soil repellency and flame retardant.

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    sammanfattning
  • 9.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Digital inkjet functionalization of water-repellent textile for smart textile application2018Ingår i: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Digital inkjet printing is a production technology with high potential in resource efficient processes, which features both flexibility and productivity. In this research, waterborne, fluorocarbon-free ink containing polysiloxane in the form of micro-emulsion is formulated for the application of water-repellent sports- and work wear. The physicochemical properties of the ink such as surface tension, rheological properties and particle size are characterized, and thereafter inkjet printed as solid square pattern (10 × 10 cm) on polyester and polyamide 66 fabrics. The water contact angle (WCA) of the functional surfaces is increased from < 90° to ca. 140° after 10 inkjet printing passes. Moreover, the functional surface shows resistance to wash and abrasion. The WCA of functional surfaces is between 130° and 140° after 10 wash cycles, and is ca. 140° after 20000 revolutions of rubbing. The differences in construction of the textile as well as ink–filament interaction attribute to the different transportation behaviors of the ink on the textile, reflected in the durability of the functional layer on the textile. The functionalized textile preserves its key textile feature such as softness and breathability. Inkjet printing shows large potential in high-end applications such as customized functionalization of textiles in the domain of smart textiles.

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    JUYU_Inkjet_Waterrepel
  • 10.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Viková, Martina
    Technical University of Liberec.
    Vik, Michal
    Technical University of Liberec.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Inkjet printing and UV-LED curing of photochromic dyes for functional and smart textile applications2018Ingår i: RSC Advances, E-ISSN 2046-2069, Vol. 8, nr 50, s. 28395-28404Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Health concerns as a result of harmful UV-rays drive the development of UV-sensors of different kinds. In this research, a UV-responsive smart textile is produced by inkjet printing and UV-LED curing of a specifically designed photochromic ink on PET fabric. This paper focuses on tuning and characterizing the colour performance of a photochromic dye embedded in a UV-curable ink resin. The influence of industrial fabrication parameters on the crosslinking density of the UV-resin and hence on the colour kinetics is investigated. A lower crosslinking density of the UV-resin increases the kinetic switching speed of the photochromic dye molecules upon isomerization. By introducing an extended kinetic model, which defines rate constants kcolouration, kdecayand kdecolouration, the colour performance of photochromic textiles can be predicted. Fabrication parameters present a flexible and fast alternative to polymer conjugation to control kinetics of photochromic dyes in a resin. In particular, industrial fabrication parameters during printing and curing of the photochromic ink are used to set the colour yield, colouration/decolouration rates and the durability, which are important characteristics towards the development of a UV-sensor for smart textile applications.

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    fulltext
  • 11.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Periyasamy, Aravin
    Technical University of Liberec.
    Viková, Martina
    Technical University of Liberec.
    Vik, Michal
    Technical University of Liberec.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Resource-Efficient Production of a Smart Textile UV Sensor Using Photochromic Dyes: Characterization and Optimization2018Ingår i: Narrow and Smart Textiles / [ed] Prof. Dr. Yordan Kyosev, Prof. Dr. Boris Mahltig, Prof. Dr. Anne Schwarz-Pfeiffer, Springer Publishing Company, 2018, s. 251-257Kapitel i bok, del av antologi (Refereegranskat)
  • 12.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Periyasamy, Aravin
    Technical University of Liberec.
    Viková, Martina
    Technical University of Liberec.
    Vik, Michal
    Technical University of Liberec.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Characterization and optimization of an inkjet-printed smart textile UV-sensor cured with UV-LED light2017Ingår i: IOP Conference Series: Materials Science and Engineering, 2017, Vol. 254, artikel-id 072023Konferensbidrag (Refereegranskat)
    Abstract [en]

    For the development of niche products like smart textiles and other functional high-end products, resource-saving production processes are needed. Niche products only require small batches, which makes their production with traditional textile production techniques time-consuming and costly. To achieve a profitable production, as well as to further foster innovation, flexible and integrated production techniques are a requirement. Both digital inkjet printing and UV-light curing contribute to a flexible, resource-efficient, energy-saving and therewith economic production of smart textiles. In this article, a smart textile UV-sensor is printed using a piezoelectric drop-on-demand printhead and cured with a UV-LED lamp. The UVcurable ink system is based on free radical polymerization and the integrated UVsensing material is a photochromic dye, Reversacol Ruby Red. The combination of two photoactive compounds, for which UV-light is both the curer and the activator, challenges two processes: polymer crosslinking of the resin and color performance of the photochromic dye. Differential scanning calorimetry (DSC) is used to characterize the curing efficiency of the prints. Color measurements are made to determine the influence of degree of polymer crosslinking on the developed color intensities, as well as coloration and decoloration rates of the photochromic prints. Optimized functionality of the textile UV-sensor is found using different belt speeds and lamp intensities during the curing process.

  • 13.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Resource-efficient production of a textile UV-sensor for healthcare applications2017Ingår i: Books of abstracts: Aachen-Dresden-Denkendorf International Textile Conference, Stuttgart, 2017, 2017Konferensbidrag (Övrigt vetenskapligt)
  • 14.
    Yu, Junchun
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    DEVELOPMENT OF HYDROPHOBIC INK FOR INKJET PRINTING OF FUNCTIONAL TEXTILE2016Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Digital inkjet printing is a resource effective and flexible manufacturing method, which has great potential to replace the large-scale conventional textile processes, and stimulates innovation in small and flexible production such as in the domain of smart textiles. Water-repellent textile has great importance in the application of sport- and work- wear. In this research, a hydrophobic ink free from fluorocarbon is formulated. The rheological properties, surface tension and particle size were characterized in order to fit the jetting parameter of the print head. In order to improve the adhesion between the deposited ink and substrate, plasma and alkaline pre-treatment were performed on polyester substrate. The novel formulation was inkjet printed as the solid bock on polyester and polyamide 6,6. The hydrophobicity of the fabrics was measured by water contract angle measurement. The effect of pre-treatment on the adhesion of ink to substrate as well as on functional property of textile was evaluated after washing and abrasion tests.   

  • 15.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Digital inkjet printing as flexible and resource-saving production technique for a smart textile UV-sensor2016Konferensbidrag (Övrigt vetenskapligt)
  • 16.
    Yu, Junchun
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Inkjet printing of functional ink for smart textile application2016Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Fluorocarbon-free, water-repellent inks for sports- and work- wear were developed and inkjet printed. The inkjet printed samples show promising hydrophobicity and fastness properties. The result indicates that it can be possible to combine inkjet printing and functional ink as resource efficient production method for customization in the domain of smart textile.

  • 17.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Production of a UV-curable and UV-sensing smart textile using digital inkjet printing2016Ingår i: Books of abstracts: Aachen-Dresden-Denkendorf International Textile Conference, Dresden, 2016Konferensbidrag (Övrigt vetenskapligt)
  • 18.
    Nierstrasz, Vincent
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Digital inkjet in functional and smart textile production: turning wet textile processes into dry and energy-efficient processes.2015Ingår i: Proceedings of the 54th Dornbirn Man-Made Fibre Congres, 16-18 September 2015, Dornbirn, Austria., 2015, s. 1-18Konferensbidrag (Refereegranskat)
    Abstract [en]

    Conventional textile dyeing and finishing processes typically utilize large quantities of water, energy and chemicals. Despite many efforts to improve resource efficiency textile industry still needs to find radical solutions to substantially reduce its ecological footprint. The objective of the research is to enable textile industry to introduce more effective processes avoiding unnecessary use of water, energy, chemicals and minimization of waste.Digital inkjet technology is a technology with large potential in resource effective production of high end products such as functional and smart textiles in addition to colour printing on textiles. Moreover, digital inkjet technology stimulates innovation through the possibility of small batches, enables novel production strategies (digitalisation of the value chain) and it effectively bridges design and technology. The technology offers strong potential in made-to-measure smart textiles with e.g. applications in health-care and sports.Our research projects in digital inkjet technology focus on the development of stable functional inks, in order to produce textiles with e.g. superhydrophobic, antistatic, conductive, UV sensing or antimicrobial properties as well as inks for color printing.

  • 19.
    Yu, Junchun
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. vincent.nierstrasz@hb.se.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Inkjet printing of waterborne hydrophobic ink for functionalization of textile2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Digital inkjet printing of functional layer on textiles is a resource efficient and flexible manufacturing process, with reduced ecological footprint. This technology has large potential in high-end applications such as in the domain of smart textiles. The purpose of our research is to develop a waterborne, fluorocarbon free ink for water-repellent sports- and work- wear. The novel ink formulation was characterized by measuring surface tension and rheology and thereafter inkjet printed as solid block pattern (10×10 cm) on polyester fabrics. The hydrophobicity of the functional surface was characterized by water contact angle measurements. The wash fastness and abrasion properties of functional surface were investigated. The inkjet printed functional surface shows promising hydrophobicity compared to commercial available products.

  • 20.
    Seipel, Sina
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Junchun, Yu
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nierstrasz, Vincent
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sustainable production of a UV-sensing smart textile2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The general objective of our research is to develop smart textiles using novel production techniques like digital inkjet printing. Digital inkjet printing enables a sustainable and integrated textile production where less energy, water and chemicals are used, as well as less waste is produced. Inkjet printing can typically be used for the production of small batches, which benefits the production of technical and smart high end products. The advantage compared to traditional textile production techniques is that functionalizing chemicals are applied only where needed and complex designs can easily be changed.

    Smart textiles are capable of interacting with the environment and are therewith ideal, flexible lightweight sensors [1]. A wearable and integrated sensor technology can among others be developed through the functionalization of textiles with chromic materials. By showing a reversible colour change a photochromic textile can make the user aware of an environmental danger such as augmented UV-radiation coupled with certain temperature conditions [2,3].

    Our research focus on the sustainable production of a UV-sensing smart textile leads to the exploration of minimized water and energy consumption in textile production. In specific, a radiation curable matrix as carrier for the functional material is investigated. The challenge in our work is to consider the role of radiation as curer and activator, as well as the effect of temperature in order to optimize the functionality range of the sensor. Furthermore, storage tests of photochromic prints are conducted to determine the storage stability of the UV-sensor. 

    Ladda ner fulltext (pdf)
    fulltext
  • 21.
    Nierstrasz, Vincent
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yu, Junchun
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Seipel, Sina
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Towards more flexible, sustainable and energy-efficient textile functionalization processes: Digital inkjet in functional and smart textile production2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Conventional textile processes are characterized by large scale production runs and typically utilize large quantities of water, energy and chemicals, making them less suitable for the production of functional and smart textiles. Key objective of the research initiative is to introduce flexible, more resource effective textile functionalization processes.

    Digital inkjet technology is a technology with large potential in resource effective production of high end products such as functional and smart textiles in addition to colour printing on textiles. The challenge is to make the potential of digital inkjet technology in high end products an opportunity for the European textile industry.

    Digital inkjet technology stimulates innovation through the possibility of small production runs, enables novel production strategies (digitalisation of the value chain) and it effectively bridges design and technology. The technology offers strong potential in made-to-measure smart textiles with e.g. applications in health-care and sports.

    Ladda ner fulltext (pdf)
    fulltext
  • 22.
    Seipel, Sina
    et al.
    Högskolan i Borås, Institutionen Textilhögskolan.
    Yu, Junchun
    Högskolan i Borås, Institutionen Textilhögskolan.
    Nierstrasz, Vincent
    Högskolan i Borås, Institutionen Textilhögskolan.
    Development of a Textile UV-Sensor2014Konferensbidrag (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 23.
    Nierstrasz, Vincent
    et al.
    Högskolan i Borås, Institutionen Textilhögskolan.
    Yu, Junchun
    Högskolan i Borås, Institutionen Textilhögskolan.
    Seipel, Sina
    Högskolan i Borås, Institutionen Textilhögskolan.
    Agnhage, Tove
    Högskolan i Borås, Institutionen Textilhögskolan.
    Functionalization of textile materials using inkjet technology2014Ingår i: 53rd DORNBIRN MAN-MADE FIBERS CONGRESS, Dornbirn MFC , 2014, Vol. 60911PM1330, s. 1-8Konferensbidrag (Övrigt vetenskapligt)
1 - 23 av 23
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