Preparation And Properties Of Multiple Acids Doped Polyaniline Functional Fabrics

The conductive polymer has been paid much attention because of its structural design,structural diversification,machinability,light weight and easy to compound,which mainly includes polypyrrole?PPy?,polyaniline?PANI?and polythiophene?PTH?.Among them,due to the high stability,good conductivity,easy synthesis and low cost of PANI,the conductive composite materials has drawn widespread interest because they are most likely to close industrial applications to a large extent.At present,the PANI composite textiles are mostly single acid doping,this subject discusses how to use composite acid doping and combine PANI with inorganic,organic materials to synthesis directly the multi-functional composite conductive fabric,the main contents of this research are as follows:A new type of polyester?PET?fabric with conductive and flame retardant function?nitrogen protection?was prepared by co-doping in-situ polymerization of HCl and H₃PO4.The PET fabric was characterized by Fourier transfer infrared?FTIR?,X-ray photoelectron spectroscopy?XPS?,scanning electron microscopy?SEM?and so on,indicating that PANI had been successfully polymerized into PET fabric.By Energy Dispersive Spectrometer analysis?EDS?,P elements?3.8%-8.18%?played an important role in the carbonation process;modified treatment improved the thermal stability of the polyester fabric,which was indicated by the TGA analysis of the PET fabric before and after the modification,the carbon residue rate was up to 9.84%by doping H₃PO4,when the molar ratio of APS and An reached2:1,the LOI was up to 42 vol.%,indicating excellent flame retardancy.At the same time when the molar ratio of APS and An reached 1.2:1,the conductivity reached 17.8 S/cm and a slight decrease after 10 washes.PANI/TiO₂ modified composite cotton fabric with conductive and photocatalytic activity was prepared by SSA and SDBS co-doping in-situ polymerization.The surface morphology,element type,valence state and crystallinity of cotton fiber before and after modification were analyzed by FTIR,XPS,X-ray diffraction?XRD?and field emission electron microscopy?FESEM?.When the concentration of TiO₂ was 1.2 g/L,the conductivity was 14.2 S/cm,when the concentration of TiO₂ was increased to 4 g/L,the conductivity decreased to 8.8S/cm.The anti-UV performance of PANI/TiO₂/Cotton composite fabric reached 50+even after 10 washes,the fabric belonged to anti-UV function fabric;Finally,the adsorption and photocatalytic performance of the composite fabric were studied by adsorption and photocatalytic degradation of MB,PANI had good adsorption properties,and PANI/TiO₂/Cotton composite fabric had great adsorption and photocatalytic performance,the total efficiency of adsorption and degradation of MB was up to 83.05%.Via in-situ polymerization method and carboxylic acid,hydrochloric acid and chitosan?CTS?co-doping,CTS/PANI modified composite wool conductive fabric was synthesized with the method of one-step synthesis,using oxygen plasma pretreatment to destroy the scaly layer of wool surface and then introduce lively free radicals which can form hydrogen bonds with the-OH of CTS,it was beneficial to improve the binding force among CTS,PANI and wool,increase the binding fastness,and form a more uniform conductive layer.By single factor analysis,the optimum reaction conditions for the preparation of CTS/PANI/Wool composite conductive fabric were:using oxygen plasma pretreatment,the time of pretreatment was 3 min,the power of treatment was 200 W,the concentration of An was 0.5mol/L,the time of An immersion was 1 h,the oxidant concentration was 0.009 mol/L,the oxidant immersion time was 10 s,the oxidation reaction time was 4 h,the concentration of acetic acid was 1%and CTS concentration was 2.05%,the conductivity of the obtained composite conductive fabric was over 11.32 S/cm,the prepared CTS/PANI/Wool composite conductive fabrics had uniform color,good hydrophilicity as well as good antibacterial properties.The antibacterial effect of Escherichia coli and Staphylococcus aureus was more than 99.99%even after 10 washes.The adsorption mechanism of An molecules on wool surface was studied by equilibrium molecular dynamics simulation.And the micro-mechanism was further explored about the addition of chitosan resulted in the increase of An adsorption and more uniform adsorption.It was found that the competitive adsorption of An molecules on the waxy keratin with different properties and the regional characteristics of the combination of different residues were the primary cause of the inhomogeneity of the An adsorption on the wool surface.After adding CTS,the An molecules were adsorbed on the chitosan,and then absorbed around the amino acid residuals,so that there were more An molecules aggregated around the inactive amino acid residues,thus increasing the overall adsorption of An on the wool surface as well as the uniformity of adsorption.The results of molecular simulation were consistent with the experimental results,and the mechanism of adsorption was explained from the molecular level.