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Yu, Junchun
Publications (10 of 20) Show all publications
Seipel, S., Yu, J., Viková, M., Vik, M., Koldinská, M., Havelka, A. & Nierstrasz, V. (2019). Color performance, durability and handle of inkjet-printed and UV-cured photochromic textiles for multi-colored applications. Fibers And Polymers, 20
Open this publication in new window or tab >>Color performance, durability and handle of inkjet-printed and UV-cured photochromic textiles for multi-colored applications
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2019 (English)In: Fibers And Polymers, ISSN 1229-9197, E-ISSN 1875-0052, Vol. 20Article in journal (Refereed) Published
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.

Keywords
Inkjet printing, UV curing, textile sensor, photochromic, durability
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21901 (URN)10.1007/s12221-019-1039-6 (DOI)
Available from: 2019-10-29 Created: 2019-10-29 Last updated: 2019-11-08Bibliographically approved
Zhou, Y., Yu, J., Biswas, T., Tang, R.-C. & Nierstrasz, V. (2019). Inkjet Printing of Curcumin-Based Ink for Coloration and Bioactivation of Polyamide, Silk, and Wool Fabrics. ACS Sustainable Chemistry & Engineering, 7(2)
Open this publication in new window or tab >>Inkjet Printing of Curcumin-Based Ink for Coloration and Bioactivation of Polyamide, Silk, and Wool Fabrics
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2019 (English)In: ACS Sustainable Chemistry & Engineering, E-ISSN 2168-0485, Vol. 7, no 2Article in journal (Refereed) Published
Keywords
antibacterial activity; antioxidant activity; curcumin; durability; inkjet printing; tannin acid
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15761 (URN)10.1021/acssuschemeng.8b04650 (DOI)
Available from: 2019-02-17 Created: 2019-02-17 Last updated: 2019-02-18Bibliographically approved
Biswas, T., Yu, J. & Nierstrasz, V. (2019). Inkjetting of Enzymes: Chapter 12. In: Artur Cavaco-Paulo, Vincent Nierstrasz, Qiang Wang (Ed.), Advance in Textile Biotechnology 2nd edition: . Elsevier
Open this publication in new window or tab >>Inkjetting of Enzymes: Chapter 12
2019 (English)In: Advance in Textile Biotechnology 2nd edition / [ed] Artur Cavaco-Paulo, Vincent Nierstrasz, Qiang Wang, Elsevier, 2019Chapter in book (Refereed)
Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
inkjetting of enzymes
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21597 (URN)978-0-08-102632-8 (ISBN)978-0-08-102770-7 (ISBN)
Available from: 2019-08-13 Created: 2019-08-13 Last updated: 2019-08-26Bibliographically approved
Yu, J. (2018). Digital inkjet functionalization of water-repellent textile for smart textile application. Journal of Materials Science
Open this publication in new window or tab >>Digital inkjet functionalization of water-repellent textile for smart textile application
2018 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803Article in journal (Refereed) Published
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.

National Category
Natural Sciences
Identifiers
urn:nbn:se:hb:diva-15019 (URN)10.1007/s10853-018-2521-z (DOI)000436424400046 ()2-s2.0-85048593407 (Scopus ID)
Funder
Knowledge Foundation, 20150040
Available from: 2018-08-24 Created: 2018-08-24 Last updated: 2018-08-27Bibliographically approved
Tadesse, M. G., Nierstrasz, V. & Yu, J. (2018). Effect of chemical concentration on the rheology of inkjet conductive inks. In: : . Paper presented at 18th World Textile Conference of Autex, Istanbul, 20-22 June, 2018.. Istanbul
Open this publication in new window or tab >>Effect of chemical concentration on the rheology of inkjet conductive inks
2018 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Viscosity and surface tension are the fundamental rheological property of an ink for inkjet printing. In this work, we optimized the viscosity and surface tension of inkjet inks by varying the concentration of glycerol with water, PEDOT-PSS with glycerol and water, finally by adding the surfactant. The surface resistance of the sample was characterized by four-probe measurement principle. The change in volume of PEDOT-PSS in water, as well as the change in weight of glycerol in water has got a great influence on the viscosity on both temperature dependence and shear dependence behaviour of the ink solution. The surface tension of the solution changed from 37 to 28mN/m due to the addition of Triton. Varying the volume of PEDOT-PSS and the volume of glycerol in water has a great influence on the viscosity of the ink solution for inkjet printing. Viscosity drops from 12.5 to 9.5 mPa s with the addition of Triton at 25 oC. The PEDOT-PSS solution was found to be temperature dependence but not shear dependence as it is a Newtonian fluid. The sample was used to connect the light emitting diode (LED), and hence the electrical conductivity, with a surface resistance of 0.158 KΩ/square, was sufficient enough to give transfer current for LED lamp. The rheology of the inkjet ink is very critical for the successful droplet formation of the inkjet printing.

Place, publisher, year, edition, pages
Istanbul: , 2018
Keywords
shear rate, surface tension, surfactant, viscosity
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-14990 (URN)
Conference
18th World Textile Conference of Autex, Istanbul, 20-22 June, 2018.
Projects
Quality inspection and evaluation of functional or smart textile fabric surface by skin contact mechanics
Available from: 2018-08-15 Created: 2018-08-15 Last updated: 2018-08-15Bibliographically approved
Biswas, T., Yu, J. & Nierstrasz, V. (2018). Functionalization of textiles with enzymes by inkjet printing. In: : . Paper presented at AUTEX 2018, Istanbul, June 20-22, 2018.
Open this publication in new window or tab >>Functionalization of textiles with enzymes by inkjet printing
2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

The catalytic activity of the enzymes can be introduced to textile surfaces for bio-sensing applications by immobilizing them through a resource-efficient deposition method such as inkjet printing [1]. Contrary to conventional dispensing methods, drop-on-demand inkjet printing can provide with high precision deposition of these enzymes along with flexibility for small-scale production [2]. To the best of our knowledge, studies on the inkjetting of enzymes are limited and often uses a modified/adapted commercial paper printer for jetting [3]. Additionally, the effect of ink formulation and printing condition variables on the activity of enzyme are not well explored. Many of such variables suggested for jetting of proteins [4] includes e.g. ink rheology, operating temperature, drop size retention, and the shear force acting on the ink. In our research effect of these variables are studied using a digital inkjet printer (Xennia Carnelian) with a Sapphire QS10 piezo-electric print head (Fujifilm Dimatix, USA). Lysozyme is used as a model enzyme for printing due to its well-known structure and catalytic mechanism. Effect of temperature and shear force development within the print head on lysozyme activity is investigated. Additionally, pre-treatment of the fabric to improve ink adhesion through various surface activation processes are studied. Finally, remaining activity of the printed enzymes over washing is evaluated to ensure the fastness property.

Acknowledgment

This research project is funded by University of Borås, Sweden.

References

[1]     Li J, Rossignol F, Macdonald J. Inkjet printing for biosensor fabrication: combining chemistry and technology for advanced manufacturing. Lab on a Chip 2015;15(12):2538-2558.

[2]     Nierstrasz V, Yu J, Seipel S. Towards more flexible, sustainable and energy-efficient textile functionalization processes: Digital inkjet in functional and smart textile production. In: 9th Aachen-Dresden International Textile Conference 2015; 2015.

[3]     Yamazoe H. Fabrication of protein micropatterns using a functional substrate with convertible protein-adsorption surface properties. J Biomed Mater Res A 2012;100(2):362-9.

[4]     Delaney JT, Smith PJ, Schubert US. Inkjet printing of proteins. Soft Matter 2009;5(24):4866-4877.

National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-14430 (URN)
Conference
AUTEX 2018, Istanbul, June 20-22, 2018
Available from: 2018-07-02 Created: 2018-07-02 Last updated: 2018-07-10Bibliographically approved
Seipel, S. & Yu, J. (2018). Inkjet printing and UV-LED curing of photochromic dyes for functional and smart textile applications. RSC Advances, 8(50), 28395-28404
Open this publication in new window or tab >>Inkjet printing and UV-LED curing of photochromic dyes for functional and smart textile applications
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2018 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 8, no 50, p. 28395-28404Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2018
Keywords
inkjet printing, UV curing, photochromic, smart textile, functional textile
National Category
Engineering and Technology Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-14901 (URN)10.1039/C8RA05856C (DOI)000442616800013 ()2-s2.0-85052053586 (Scopus ID)
Available from: 2018-08-08 Created: 2018-08-08 Last updated: 2018-11-30Bibliographically approved
Nechyporchuk, O., Yu, J., Nierstrasz, V. & Bordes, R. (2017). Cellulose Nanofibril-Based Coatings of Woven Cotton Fabrics for Improved Inkjet Printing with a Potential in E-Textile Manufacturing. ACS Sustainable Chemistry & Engineering
Open this publication in new window or tab >>Cellulose Nanofibril-Based Coatings of Woven Cotton Fabrics for Improved Inkjet Printing with a Potential in E-Textile Manufacturing
2017 (English)In: ACS Sustainable Chemistry & Engineering, E-ISSN 2168-0485Article in journal (Refereed) Published
Abstract [en]

The inherent flammability of cellulosic fibers limits their use in some advanced applications. This work demonstrates for the first time the production of flame-retardant macroscopic fibers from wood-derived cellulose nanofibrils (CNF) and silica nanoparticles (SNP). The fibers are made by extrusion of aqueous suspensions of anionic CNF into a coagulation bath of cationic SNP at an acidic pH. As a result, the fibers with a CNF core and a SNP thin shell are produced through interfacial complexation. Silica-modified nanocellulose fibers with a diameter of ca. 15 μm, a titer of ca. 3 dtex and a tenacity of ca. 13 cN tex–1 are shown. The flame retardancy of the fibers is demonstrated, which is attributed to the capacity of SNP to promote char forming and heat insulation on the fiber surface.

Keywords
cellulose nanofibrils, flame-retardant fibers, nanocellulose, silica nanoparticles, wet spinning
National Category
Materials Engineering
Identifiers
urn:nbn:se:hb:diva-12974 (URN)10.1021/acssuschemeng.7b00200 (DOI)000402950000036 ()2-s2.0-85020214044 (Scopus ID)
Funder
Knowledge Foundation
Available from: 2017-11-08 Created: 2017-11-08 Last updated: 2018-01-04Bibliographically approved
Seipel, S., Yu, J., Periyasamy, A., Viková, M., Vik, M. & Nierstrasz, V. (2017). Characterization and optimization of an inkjet-printed smart textile UV-sensor cured with UV-LED light. In: IOP Conference Series: Materials Science and Engineering: . Paper presented at AUTEX World Textile Conference, Corfu, May 29-31, 2017. , 254, Article ID 072023.
Open this publication in new window or tab >>Characterization and optimization of an inkjet-printed smart textile UV-sensor cured with UV-LED light
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2017 (English)In: IOP Conference Series: Materials Science and Engineering, 2017, Vol. 254, article id 072023Conference paper, Oral presentation with published abstract (Refereed)
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.

Keywords
UV curing, digital inkjet printing, smart textile, photochromic
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-12284 (URN)10.1088/1757-899X/254/7/072023 (DOI)000417214900083 ()
Conference
AUTEX World Textile Conference, Corfu, May 29-31, 2017
Available from: 2017-07-07 Created: 2017-07-07 Last updated: 2018-11-29Bibliographically approved
Yu, J., Seipel, S. & Nierstrasz, V. (2016). DEVELOPMENT OF HYDROPHOBIC INK FOR INKJET PRINTING OF FUNCTIONAL TEXTILE. In: : . Paper presented at The 90th Textile Institute World Conference, Poznan, April 25-28, 2016.
Open this publication in new window or tab >>DEVELOPMENT OF HYDROPHOBIC INK FOR INKJET PRINTING OF FUNCTIONAL TEXTILE
2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
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.   

National Category
Natural Sciences
Identifiers
urn:nbn:se:hb:diva-10822 (URN)
Conference
The 90th Textile Institute World Conference, Poznan, April 25-28, 2016
Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-05-04Bibliographically approved
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