Synthesis And Properties Of Flexible Conductive Materials Based On Fibre Template

Recently, intense interest has arisen in flexible conductive materials to meet the technological demands of modern society. Transparent conductive oxide (TCO) and related TCO/organic conductive nanocomposites have become the focus in the field of material science.In this text, a regular ITO conductive network (ICN) was fabricated by a simple "dipping and drying" process using cotton as a template. The flexible composite consisted of a ICN and a poly(dimethyl siloxane) (PDMS) substrate was prepared subsequently. The obtained materials were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), Brunauer-Emmett-Teller (BET), field emission scanning electron microscopy (FE-SEM), low-impedance surface impedance instrument, universal tester and UV-vis transmission spectrophotometer. The results indicated that the ICN was composed of numerous 20-30 nm ITO aggregate nanocrystallines with ordered distribution. The composite showed a very high electrical conductivity of-5 S m-1, which was-12 times of magnitude higher than that of other ordinary ITO-based composites. Moreover, it exhibited superior electrical/mechanical performance when bent or twisted compared to other ITO-based composites. The state of ITO aggregation in these samples was responsible for their different properties. The ICN/PDMS composite had an excellent mechanical property which was increased by a factor of-1.7 compared with pure PDMS resin and exhibited relatively high optical transmittance in the visible and ultraviolet regions.ATO nanoparticles were synthesized by the solvothermal route and silanized with silane coupling agents. The ATO conductive network (ACN) was prepared by electrospinning a mixture of modified ATO and polyvinylpyrrolidone (PVP). The flexible composite consisted of a ACN and a PDMS substrate was prepared subsequently. The obtained materials were characterized by XRD, FTIR, FE-SEM, thermogravimetric (TG), low-impedance instrument and UV-vis spectrophotometer. The results indicated that the dispersity and sedimentation stability of the ATO particles were improved after silanization. The ACN/PDMS composite showed a very high electrical conductivity of-2.6 S m-1 and exhibited superior electrical/mechanical performance when bent or twisted. The composite exhibited relatively high optical transmittance in the visible and ultraviolet regions.Also, the ACN were prepared by Sol-Gel method and electrospinning a precursor mixture and the flexible composite consisted of a ACN and a PDMS substrate was prepared subsequently. The obtained materials were characterized by XRD, BET, FE-SEM, TG, low-impedance instrument, optical profiler and UV-vis spectrophotometer. The results indicated that the ACN was composed of numerous 30-50 nm ATO aggregate nanocrystallines with ordered distribution. The ATO particle size was smaller and the electrical property of the composite was superior compared to the ACN prepared by particle electrospinning. The ACN/PDMS composite showed a very high electrical conductivity of-3.4 S m-1 and exhibited superior electrical/mechanical performance when bent or twisted. The composite exhibited relatively high optical transmittance in the visible and ultraviolet regions.The outstanding properties of the flexible conductive materials based on fibre template should make them suitable for many applications including flexible electronics, intelligent textile, new classes of solar cell and so on.