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Publications (10 of 109) Show all publications
Eutionnat-Diffo, P., Chen, Y., Guan, J., Cayla, A., Campagne, C. & Nierstrasz, V. (2020). Study of the Wear Resistance of Conductive Poly Lactic Acid Monofilament 3D Printed onto Polyethylene Terephthalate Woven Materials. Materials, 10(13), Article ID 2334.
Open this publication in new window or tab >>Study of the Wear Resistance of Conductive Poly Lactic Acid Monofilament 3D Printed onto Polyethylene Terephthalate Woven Materials
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2020 (English)In: Materials, Vol. 10, no 13, article id 2334Article in journal (Refereed) Published
Abstract [en]

Wear resistance of conductive Poly Lactic Acid monofilament 3D printed onto textiles, through Fused Deposition Modeling (FDM) process and their electrical conductivity after abrasion are important to consider in the development of smart textiles with preserved mechanical and electrical properties. The study aims at investigating the weight loss after abrasion and end point of such materials, understanding the influence of the textile properties and 3D printing process parameters and studying the impact of the abrasion process on the electrical conductivity property of the 3D printed conductive polymers onto textiles. The effects of the 3D printing process and the printing parameters on the structural properties of textiles, such as the thickness of the conductive Poly Lactic Acid (PLA) 3D printed onto polyethylene terephthalate (PET) textile and the average pore sizes of its surface are also investigated. Findings demonstrate that the textile properties, such as the pattern and the process settings, for instance, the printing bed temperature, impact significantly the abrasion resistance of 3D printed conductive Poly Lactic Acid (PLA) onto PET woven textiles. Due to the higher capacity of the surface structure and stronger fiber-to-fiber cohesion, the 3D printed conductive polymer deposited onto textiles through Fused Deposition Modeling process have a higher abrasion resistance and lower weight loss after abrasion compared to the original fabrics. After printing the mean pore size, localized at the surface of the 3D-printed PLA onto PET textiles, is five to eight times smaller than the one of the pores localized at the surface of the PET fabrics prior to 3D printing. Finally, the abrasion process did considerably impact the electrical conductivity of 3D printed conductive PLA onto PET fabric.

Keywords
Fused Deposition Modeling (FDM); 3D printing; Poly Lactic Acid (PLA) monofilament; polyethylene terephthalate woven fabric (PET); abrasion and electrical conductivity
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-23223 (URN)10.3390/ma13102334 (DOI)
Projects
SMDTex project
Funder
EU, European Research Council
Available from: 2020-05-20 Created: 2020-05-20 Last updated: 2020-05-20Bibliographically approved
Iyer, S., Behary, N., Guan, J. & Nierstrasz, V. (2020). Toward Bioluminescent Materials by Plasma Treatment of Microfibrous Nonwovens, Followed by Immobilization of One or Both Enzyme(s) (Luciferase and FMN Reductase) Involved in Luminescent Bacteria. ACS Applied Bio Materials
Open this publication in new window or tab >>Toward Bioluminescent Materials by Plasma Treatment of Microfibrous Nonwovens, Followed by Immobilization of One or Both Enzyme(s) (Luciferase and FMN Reductase) Involved in Luminescent Bacteria
2020 (English)In: ACS Applied Bio Materials, ISSN 2543-3440Article in journal (Refereed) Published
Abstract [en]

Bioluminescent living organisms emit light through a specific biocatalyzed reaction involving a luciferin substrate and a luciferase enzyme. The present work investigated the possibility of creating optimal luminescence by immobilization of one or both the enzymes Luciferase (Luc) and FMN reductase (Red) involved in a bioluminescent bacterial system onto a plasma-activated microfibrous PET nonwoven. Parameters affecting the catalytic activity and efficiency of the bacterial system in aqueous medium were determined by luminescence intensity measurements using a luminometer. Two types of plasma, air atmospheric plasma (ATMP) and cold remote plasma (CRPNO) treatment, were used to activate the PET nonwoven. Further, one or both enzyme(s) were immobilized using a physical adsorption technique, without or with the use of natural biopolymers (gelatin and starch) and bovine serum albumin-BSA protein, to improve enzyme stability and activity. Coimmobilization of both Red and Luc enzymes on the CRPNO plasma-activated nonwoven in the presence of BSA led to the maximum luminescence. As high as 60,000 RLU equivalent to that of an LED light used for calibration was observed and showed stable intensity up to 6 min. Fiber surface analysis was tested using wettability tests (water contact angle and capillary uptake), while scanning electron microscopy, atomic force microscopy, and electron spectroscopy for chemical analysis showed changes in fiber surface morphology and chemical functional groups. A considerable increase in “N” atom content after coimmobilization of enzymes in the presence of BSA was detected. This study is the first successful attempt to use a biomimetic strategy for immobilization of enzymes involved in bacterial luminescence on a plasma-activated microfibrous nonwoven in an attempt to attain bioluminescent materials.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-23165 (URN)10.1021/acsabm.0c00329 (DOI)
Available from: 2020-05-04 Created: 2020-05-04 Last updated: 2020-06-01Bibliographically approved
Morshed, M. N., Behary, N., Bouazizi, N. & Nierstrasz, V. (2019). 3-Mercapto-1,2-propanediol modified robust polyester nonwoven for stabilization of zerovalent iron nanoparticles for multifunctional application. In: Proceedings of 257th ACS National Meeting: . Paper presented at 257th ACS National Meeting, Orlando, Mar 31 - Apr 04, 2019.. Orlando, FL, USA: American Chemical Society (ACS), 257
Open this publication in new window or tab >>3-Mercapto-1,2-propanediol modified robust polyester nonwoven for stabilization of zerovalent iron nanoparticles for multifunctional application
2019 (English)In: Proceedings of 257th ACS National Meeting, Orlando, FL, USA: American Chemical Society (ACS), 2019, Vol. 257Conference paper, Oral presentation only (Refereed)
Abstract [en]

Highly oxidation tendency of zerovalent iron nanoparticles limits itsvarious practical applications. In this work, stabilization of zerovalent ironnanoparticles (nZVI) in 3-Mercapto-1,2-propanediol (α-thioglycerol, α -TG)modified polyester nonwoven (PN) for improved catalytic and antibacterialapplication has been studied for the first time. Changes in wettability as wellas structural, morphological, thermal and catalytic properties of the resultingPN/α -TG/nZVI material were investigated by scanning electron microscopy,energy dispersive X-Ray, zeta potential measurements, thermogravimetricanalysis, differential scanning calorimetry, fourier transform infrared and UV–visible spectroscopies. Prior to functionalization, hydrophilic functional groupshave been introduced in PN surface by air atmospheric plasma treatment.Iron nanoparticles were immobilized by α-thioglycerol on the polyester fiberswith a multi-meter particle size. α -TG stabilized nZVI by reducing thetendency of easy oxidation. nZVI insertion resulted in high thermal stability ofPN. As an application, PN/α-TG/nZVI exhibited an excellent catalytic activityin the reduction of 4-nitrophenol with appreciable recyclability. The resultsfurther demonstrate that PN/α-TG/nZVI can be employed not only for toxiccompounds removal but also to inhibit the growth of bacteria at normalconditions which herein open new prospects for concrete industrialapplications of nZVI based multifunctional systems.

Place, publisher, year, edition, pages
Orlando, FL, USA: American Chemical Society (ACS), 2019
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21300 (URN)
Conference
257th ACS National Meeting, Orlando, Mar 31 - Apr 04, 2019.
Available from: 2019-07-01 Created: 2019-07-01 Last updated: 2019-08-05Bibliographically approved
Eutionnat-Diffo, P., Yan, G., Guan, J., Nierstrasz, V., Zeng, X., Cayla, A. & Campagne, C. (2019). Adhesion improvement of conductive poly-lactic acid filament 3D printed onto polyethylene terephthalate fabric through chemical bonding. In: Adhesion improvement of conductive poly-lactic acid filament 3D printed onto polyethylene terephthalate fabric through chemical bonding: . Paper presented at 2nd International Conference on 3D Printing, 3D Bioprinting, Digital and Additive Manufacturing (I3D19) Thessaloniki, Greece, 1-5 July, 2019..
Open this publication in new window or tab >>Adhesion improvement of conductive poly-lactic acid filament 3D printed onto polyethylene terephthalate fabric through chemical bonding
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2019 (English)In: Adhesion improvement of conductive poly-lactic acid filament 3D printed onto polyethylene terephthalate fabric through chemical bonding, 2019Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Adhesion of conductive poly-lactic acid filament (PLA) 3D printed onto polyethylene terephthalate (PET) fabrics is a one of the fundamental properties to guarantee their use in smart textiles field. The conductive PLA layer is made of carbon black (CB) incorporated into PLA polymer prior to extrusion process. It is commonly known that due to the low surface tensions of polymeric materials, 3D printed conductive PLA onto PET textiles possess poor adhesion. Therefore, an improvement of this property, even already approached by some researchers (1–6), is still highly required. In this research work, a pre and post-treatments were applied to significantly improve the adhesion strength at the interface polymeric layer/textile compared to former techniques used in other researches such as plasma treatment; coating of glue stick, washing and ironing processes. The pre-treatment consists in grafting acetic acid by UV curing onto both PET fabric and PLA filament through digital printing and deep coating respectively and then applying a solution pressure sensitive adhesive (PSA) on the fabric via digital printing. After 3D printing process on textiles, heat and pressure were applied on the materials using a heat press to chemically bond the PLA layer to the PET fabric. The findings are very promising as they demonstrate the possibility of significantly improving the adhesion of thermoplastic polymer 3D printed on textiles for smart textiles applications. Compared to other alternative solutions, these findings can potentially be implemented, in the future, by using 3D printing technology for pre-treatment and printing processes followed by thermo-compression technique for complete chemical bonding.

Keywords
adhesion, 3D printing, polymer, textile materials, grafting
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-22791 (URN)
Conference
2nd International Conference on 3D Printing, 3D Bioprinting, Digital and Additive Manufacturing (I3D19) Thessaloniki, Greece, 1-5 July, 2019.
Projects
SMDTex project
Funder
EU, European Research Council
Available from: 2020-02-06 Created: 2020-02-06 Last updated: 2020-02-24Bibliographically approved
Artur, C.-P., Nierstrasz, V. & Wang, Q. (Eds.). (2019). Advances in Textile Biotechnology 2nd Edition. Woodhead Publishing ltd
Open this publication in new window or tab >>Advances in Textile Biotechnology 2nd Edition
2019 (English)Collection (editor) (Refereed)
Abstract [en]

Description

Advances in Textile Biotechnology, Second Edition examines the latest in biotechnology for the fiber and textile industry. This new edition has been fully revised to include the current essential areas of development in the field, covering both natural and synthetic fibers. Chapters cover the latest technology in bioprocessing for bast fiber, PVA, polyester, wool and silk before exploring issues of enzyme stability. Essential areas of application and development are then considered, including biomedical textiles, silk materials for biotechnological applications, bacterial cellulose, the ink jetting of enzymes, and the role of enzymes, wool and silk fibers.

Containing groundbreaking research, this book will be essential reading for manufacturers, designers and engineers in the textiles industry, textile and fiber scientists, and academic researchers and postgraduate students working in the area of textile technology.

Key Features

  • Provides a thorough overview of current and future focuses of biotechnology in the fiber and textile industry
  • Presents fully revised content, with a new focus on biosynthesis and bioprocessing for novel textile fibers, both synthetic and natural
  • Enables readers to understand and utilize the benefits of biotechnology for the manufacture and production of textiles

Readership

Textile manufacturers, designers and engineers in the textile industry; textile and fibre scientists; academic researchers and postgraduate students in textile technology; experts in the biology, chemical and environmental engineering industries

Place, publisher, year, edition, pages
Woodhead Publishing ltd, 2019
Keywords
textile biotechnology
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21596 (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
Tadesse, M. G., Harpa, R., Chen, Y., Wang, L., Nierstrasz, V. & Loghin, C. (2019). Assessing the comfort of functional fabrics for smart clothing using subjective evaluation. Journal of Industrial Textiles, 48(8), 1310-1326
Open this publication in new window or tab >>Assessing the comfort of functional fabrics for smart clothing using subjective evaluation
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2019 (English)In: Journal of Industrial Textiles, ISSN 1528-0837, E-ISSN 1530-8057, Vol. 48, no 8, p. 1310-1326Article in journal (Refereed) Published
Abstract [en]

Sensory investigations of the functional textiles could be an alternative for the quality-inspection and control of the products. The purpose of this research is to use subjective evaluation technique for assessing the tactile comfort of some functional textile fabrics based on AATCC Evaluation procedure 5-2011. Blind subjective evaluations and visual subjective evaluations were performed for sensory investigation. Ten fabric-skin-contact and comfort-related sensory properties were used to evaluate the handle of the functional textile fabrics. The reliability of the sensorial data obtained by subjective tests was evaluated using statistical data analysis techniques. A minimum and maximum consensus distance recorded were 0.58 and 1.61, respectively, using a descriptive sensory panel analysis and prove the consistency and similar sensorial perception between panelists. The Pearson correlation coefficient between panelists was up to 96% and hence a strong agreement between the panelist’s judgment. The results allowed to consider the subjective evaluation using a panel of experts could be validated in the case of functional fabrics. For functional textiles, additional visual subjective evaluation should be considered to have a similar human perception in addition to blind subjective evaluation.

Place, publisher, year, edition, pages
Sage Publications, 2019
Keywords
Sensorial comfort, bipolar attributes, subjective evaluation, handle, functional fabrics
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15310 (URN)10.1177/1528083718764906 (DOI)000459569800004 ()2-s2.0-85044038310 (Scopus ID)
Projects
Quality Inspection and evaluation of smart and functional textile fabrics by skin contact mechanics
Available from: 2018-11-13 Created: 2018-11-13 Last updated: 2019-04-12Bibliographically approved
Dural-Erem, A., Wessman, P., Husmark, U. & Nierstrasz, V. (2019). Biocontrol of solid surfaces in hospitals using microbial-based wipes. Textile research journal, 89(2), 216-222
Open this publication in new window or tab >>Biocontrol of solid surfaces in hospitals using microbial-based wipes
2019 (English)In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748, Vol. 89, no 2, p. 216-222Article in journal (Refereed) Published
Abstract [en]

Hospital-acquired infections have become a major challenge which threaten the hospitalized patients’ safety. The presence of nosocomial pathogens is generally reported in connection with solid surfaces near patient environments. These surfaces become significant sources of transmission and lead most often to the contamination and cross-contamination of nosocomial pathogens to the patients and staff. This paper investigates strategies to apply beneficial bacteria on viscose-based nonwoven wipes and the viability of these beneficial bacteria on the wipes along with characterization of the physical properties of the wipes. Major findings include that it is possible to produce dry wipes which contain an adequate number of beneficial bacteria or spores. After these wipes are wetted, they can release a certain number of bacteria from the wetted wipes. These released beneficial bacteria can inhibit pathogens by growing and colonizing on the wiped surfaces.

Keywords
functional textile, probiotics, HAI, pathogens, bacillus, bacterial spores, wipes
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-15606 (URN)10.1177/0040517517741163 (DOI)000454145000009 ()2-s2.0-85045082144 (Scopus ID)
Funder
VINNOVA, 2014-00719
Note

Article first published online: November 23, 2017; Issue published: January 1, 2019 

Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-01-14Bibliographically approved
Malm, V., Seoane, F. & Nierstrasz, V. (2019). Characterisation of Electrical and Stiffness Properties of Conductive Textile Coatings with Metal Flake-shaped Fillers. Materials, 12(21), 1-18
Open this publication in new window or tab >>Characterisation of Electrical and Stiffness Properties of Conductive Textile Coatings with Metal Flake-shaped Fillers
2019 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, no 21, p. 1-18Article in journal (Refereed) Submitted
Abstract [en]

Two conductive formulations containing different types of micron-sized metal flakes (silver-coated copper (Cu) and pure silver (Ag)) were characterised and used to form highly electrically conductive coatings (conductors) on plain and base-coated woven fabrics, the latter in an encapsulated construction. With e-textiles as the intended application, the fabric stiffness, in terms of flexural stiffness and sheet resistance (Rsh), after durability testing (laundering and abrasion) was investigated and related to user friendliness and long-term performance. Bare and encapsulated conductors with increasing amounts of deposited solids were fabricated by adjusting the knife coating parameters, such as the coating gap height (5, 20, 50, and 200 μm), which reduced the Rsh, as determined by four-point probe (4PP) measurements; however, this improvement was at the expense of increased flexural stiffness of the coated fabrics. The addition of a melamine derivative (MF) as a cross-linker to the Cu formulation and the encapsulation of both conductor types gave the best trade-off between durability and Rsh, as confirmed by 4PP measurements. However, the infrared camera images revealed the formation of hotspots within the bare conductor matrix, although low resistances (determined by 4PP) and no microstructural defects (determined by SEM) were detected. These results stress the importance of thorough investigation to assure the design of reliable conductors applied on textiles requiring this type of maintenance.

Keywords
Conductivity, metal flake, coating, textile, coating parameters, encapsulation, fabric stiffness, durability
National Category
Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-13942 (URN)10.3390/ma12213537 (DOI)000502798800078 ()2-s2.0-85074669865 (Scopus ID)
Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2020-03-04Bibliographically approved
Malm, V., Nierstrasz, V. & Seoane, F. (2019). Characterisation of Electrical and Stiffness Properties of Conductive Textile Coatings with Metal Flake-Shaped Fillers. Materials, 12(21), 1-18, Article ID 3537.
Open this publication in new window or tab >>Characterisation of Electrical and Stiffness Properties of Conductive Textile Coatings with Metal Flake-Shaped Fillers
2019 (English)In: Materials, ISSN ISSN 1996-1944, Vol. 12, no 21, p. 1-18, article id 3537Article in journal (Refereed) Published
Abstract [en]

Two conductive formulations containing different types of micron-sized metal flakes (silver-coated copper (Cu) and pure silver (Ag)) were characterised and used to form highly electrically conductive coatings (conductors) on plain and base-coated woven fabrics, the latter in an encapsulated construction. With e-textiles as the intended application, the fabric stiffness, in terms of flexural stiffness and sheet resistance (Rsh), after durability testing (laundering and abrasion) was investigated and related to user friendliness and long-term performance. Bare and encapsulated conductors with increasing amounts of deposited solids were fabricated by adjusting the knife coating parameters, such as the coating gap height (5, 20, 50, and 200 μm), which reduced the Rsh, as determined by four-point probe (4PP) measurements; however, this improvement was at the expense of increased flexural stiffness of the coated fabrics. The addition of a melamine derivative (MF) as a cross-linker to the Cu formulation and the encapsulation of both conductor types gave the best trade-off between durability and Rsh, as confirmed by 4PP measurements. However, the infrared camera images revealed the formation of hotspots within the bare conductor matrix, although low resistances (determined by 4PP) and no microstructural defects (determined by SEM) were detected. These results stress the importance of thorough investigation to assure the design of reliable conductors applied on textiles requiring this type of maintenance.

Keywords
conductivity, metal flake, coating, e-textile, encapsulation, durability, stiffness
National Category
Engineering and Technology Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-23090 (URN)10.3390/ma12213537 (DOI)
Available from: 2020-03-30 Created: 2020-03-30 Last updated: 2020-04-15Bibliographically approved
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)2-s2.0-85069496188 (Scopus ID)
Available from: 2019-10-29 Created: 2019-10-29 Last updated: 2020-01-29Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4369-9304

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