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  • 1.
    Hashemi Sanatgar, Razieh
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business. ENSAIT.
    Campagne, Christine
    ENSAIT.
    Nierstrasz, Vincent
    Investigation of the adhesion properties of direct 3D printing of polymers and nanocomposites on textiles: Effect of FDM printing process parameters.2017In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 403, p. 551-563Article in journal (Refereed)
    Abstract [en]

    In this paper, 3D printing as a novel printing process was considered for deposition of polymers on synthetic fabrics to introduce more flexible, resource-efficient and cost effective textile functionalization processes than conventional printing process like screen and inkjet printing. The aim is to develop an integrated or tailored production process for smart and functional textiles which avoid unnecessary use of water, energy, chemicals and minimize the waste to improve ecological footprint and productivity. Adhesion of polymer and nanocomposite layers which were 3D printed directly onto the textile fabrics using fused deposition modeling (FDM) technique was investigated. Different variables which may affect the adhesion properties including 3D printing process parameters, fabric type and filler type incorporated in polymer were considered. A rectangular shape according to the peeling standard was designed as 3D computer-aided design (CAD) to find out the effect of the different variables. The polymers were printed in different series of experimental design: nylon on polyamide 66 (PA66) fabrics, polylactic acid (PLA) on PA66 fabric, PLA on PLA fabric, and finally nanosize carbon black/PLA (CB/PLA) and multi-wall carbon nanotubes/PLA (CNT/PLA) nanocomposites on PLA fabrics. The adhesion forces were quantified using the innovative sample preparing method combining with the peeling standard method. Results showed that different variables of 3D printing process like extruder temperature, platform temperature and printing speed can have significant effect on adhesion force of polymers to fabrics while direct 3D printing. A model was proposed specifically for deposition of a commercial 3D printer Nylon filament on PA66 fabrics. In the following, among the printed polymers, PLA and its composites had high adhesion force to PLA fabrics.

  • 2.
    Kahoush, May
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business. ENSAIT.
    Behary, Nemeshwaree
    Université de Lille, Nord de France, France.
    Aurélie, Cayla
    Université de Lille, Nord de France, France.
    Brigitte, Mutel
    Université de Lille, Nord de France, France.
    Jinping, Guan
    College of Textile and Clothing Engineering, Soochow University, Suzhou, China.
    Nierstrasz, Vincent
    University of Borås, Faculty of Textiles, Engineering and Business.
    Surface modification of carbon felt by cold remote plasma for glucose oxidase enzyme immobilization2019In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 467, p. 1016-1024Article in journal (Refereed)
    Abstract [en]

    Despite their chemical inertness and poor hydrophobicity, carbon-based materials are widely used in electrochemical applications due to their robustness, good electrical conductivity and corrosion resistance. The purpose of the work carried was to increase the wettability of nonwoven carbon fiber felts for improved efficiency in bio/electrochemical applications. Virgin Carbon Felt (VCF) was first treated with cold remote plasma (CRP) using a mixture of nitrogen and oxygen (1 or 2 %) as plasma gas.  Bio-functionalization of the carbon felts with glucose oxidase (GOx) enzyme was then carried using physical adsorption method. FTIR and XPS analysis showed an integration of new oxygenated functional groups (C-O and C=O) as well as amines and amides on the surface of VCF treated by the CRP treatment, which improved the wettability of the samples. Capillary uptake increased from around 0 % (for VCF) to nearly 750 % with 2 % oxygen in plasma gas. GOx enzyme showed higher activity after immobilization at pH 5.5 on the CRP treated samples, maintaining up to 50 % of its initial enzymatic activity after six cycles while with the VCF, no enzymatic activity was observed after the fourth cycle. These obtained felts can be used as electrodes in sustainable bioprocesses.

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