Preparation and application of GN-g-MAH/PPy multifunctional PET non-woven fabric
In order to improve the performance of polyester(PET)non-woven fabrics,conductive materials was introduced into PET non-woven fabrics through surface modification,using tannic acid(TA)as a bridging agent and functi-onalized graphene(GN-g-MAH)and polypyrrole(PPy)as conductive functional layers to prepare multifunctional PET non-woven fabrics,and the microstructure and thermal stability of PET/GN-g-MAH/PPy were tested using SEM,XRD and TG.The results showed that PET/GN-g-MAH/PPy non-woven fabric was successfully prepared by cyclic self-assembly method and low-temperature chemical polymerization method,which exhibited good electrical conductivity with a low surface resistivity of 3.11×10-2Ω.m and surface conversion from hydrophobic to hydrophilic.Based on this,the non-woven fabric also exhibited excellent electrothermal properties,generating a saturation temperature of about 40 ℃ in 20 s when a 3 V driving voltage was applied to it.In addition,it also has good photothermal conversion performance.When the light intensity is 300 mW/cm2,the surface temperature can be stabilized to 105.8 ℃ after irradiation for 20 s,and the nonwoven fabric also shows excellent photothermal antibacterial properties.When the concentration of E.coli bacterial solution is 1.6×108 CFU/mL,the antibacterial rate reaches 99.6％after irradiation using xenon lamp simulating solar light source.
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