Elaboration of a Conductive Textile by Coating for Clothes Equipped with Fourth-Generation Photovoltaic Cells

Conducting polymer coated in textiles possesses a wide range of electrical properties.The surface resistivity is influenced by concentrations of the reactants,thickness of the coating,nature of the substrate surface,extent of penetration of the polymer into the textile structure and the strength of the binding of the coating to the textile surface.Low resistivity in fabric results from highly doped thicker coatings that penetrate well into the textile structure thus enabling good electrical contact between fibers.In this study,we had chosen copper as conductor polymer for coating.The electrical conductivity is influenced by the thickness of coating paste,the nature of the substrate surface.The thickness of the paste and the concentration of the copper were studied in this paper.Furthermore,the electrical surface resistance decreased from 68 MΩto 8 MΩwith decreasing in coating thickness.However,the thickness of coated fabric is very important factor to determine conductivity and application of textile.In addition,we had noticed that the airflow is affected by the coating thickness which the penetration of the airflow differs from the lower thickness to the higher one.This study confirms that we can use coating woven fabric to develop a textile substrate responding to characteristics such as electrical resistance,drapability,air permeability and tensile strength,which are particularly important to be used as a support for flexible PV(photovoltaic)cells in clothes.

Deposition of Phosphate Nanoparticles onto Textile Fabrics via Sol-gel Method and Their Kinetics Desorption Studies

In this paper,phosphate nanoparticles were coated on cotton(CO)and polyester(PES)textile surfaces by sol-gel method using tetraethylorthosilicate(TEOS)and chloropropyltriethoxysilane(CPTS)as silica precursors.The deposited nanoparticles were observed with scanning electronic microscopy energv-dispersive X-ray spectroscopy(SEM-EDX).The release kinetics of phosphorus(P)from these textiles into the aqueous medium(Aq),acid(Ac),and basic(Ba)artificial sweats were then studied.The released amount of phosphorus was evaluated by the inductively coupled plasma(ICP)according to ISO NF EN 16711-2 procedure.The results revealed that the release of P into the aqueous medium is lower than in the artificial sweat.The kinetics data[the phosphoras desorption amount(mg/g)as a iunction of time]were modeled according to five models:the first order,the second order,the third order,simple Elovich and parabolic diffusion.The suitable model was chosen based on the coefficient of determination(R2)and the calculation of the sum of the absolute errors(EABS),which describes the error between the theoretical and experimental values.SEM observations were also carried out on the fabrics after desorption in order to show the impact of desorption on their morphology.Furthermore,the impact of P release on the tensile strength of CO and PES fabrics was investigated using a uniaxial tensile test.The thennal stability of all samples before and after desorption was assessed by thermogravimetric aiialysis(ATG).