Preparation and properties of electro-conductive fabrics based on polypyrrole: covalent vs. non-covalent attachment

17th World Textile Conference AUTEX 2017 - Shaping the Future of Textiles

David, N.C.^1 ; Anavi, D.^1 ; Milanovich, M.^1 ; Popowski, Y.^1 ; Frid, L.^2 ; Amir, E.^1

Shenkar, Faculty of Engineering and Design, Department of Polymers and Plastics Engineering, Ramat Gan

5252626, Israel^1

School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel^2

关键词: Bifunctional linker molecule;    Chemically modified;    Laundering durability;    Monomer concentration;    Orders of magnitude;    Scanning electron spectroscopies;    Situ oxidative polymerization;    Volume electrical resistivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/254/3/032002/pdf
DOI  :  10.1088/1757-899X/254/3/032002

来源: IOP

【 摘 要 】

Electro-conductive fabrics were prepared via in situ oxidative polymerization of pyrrole (Py) in the presence of unmodified and chemically modified cotton fabrics. Chemical modification of cotton fabric was achieved by covalent attachment of a bifunctional linker molecule to the surface of the fabric, followed by incorporation of a monomer unit onto the linker. The fabrics were characterized using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron spectroscopy, and thermal analysis. Furthermore, the effect of Py concentration on the degree of polypyrrole (PPy) grafting, surface morphology, electrical resistivity, and laundering durability were studied for both types of cotton fabrics. Reductions of several orders of magnitude in surface and volume electrical resistivities were observed for both non-covalently and covalently linked cotton-PPy systems, whereas the effect of covalent pre-treatment of the fabric was stronger at low Py concentration. On the other hand, at higher monomer concentration, the electrical properties and laundering durability of the fabrics we comparable for both unmodified and chemically pre-treated cotton fabrics, indicating that only a small fraction of PPy chains were chemically grafted onto the fabric surface with the majority of the polymer being connected to the fabric through hydrogen bonds.