The Preparation Of Multifunctional Textile Based On Polyaniline

The conducting polymer has become an ideal conductivity controlled material in the functional material field due to its conductivity can varied reversibly from insulator to semiconductor and even to metal (10-9~105S/cm) only through simple doping/de-doping method. Among all the conducting polymers, polyaniline(PANI) has a wide technical application foreground because of its variable molecular structures, special acid doping mechanism, good environmental stability and facial machinability. During the polymerization, PANI can be endowed with special micro/nano structure, superhydrophobicity as well as electromagnetic function and so on when choose some special functioned dopant. If combined PANI with textile, it is expected to introducing the PANI's special properties to textile, so as to gain the multi-functional textile such as anti-static, self-cleaning, superhydrophobicity as well as electromagnetic function. Such researches have important scientific and application value.In this thesis, textile are used as the substrate to prepare the polyaniline conducting textile through in-situ polymerization and coating methods. The following are the details:1. PANI-coated conductive cotton textile (PANI/CCT) with superhydrophobic function was prepared via an in-situ polymerization in the presence of trifluoroacetic acid (TFA) as the dopant and the cotton textile as the substrate. The morphology, molecular structure and the property of PANI/CCT have been tested. The result shows that the contact angle of the resuulted PANI/CCT is as high as 160.5°, revealing the PANI/CCT is an ideal self-cleaning textile. Furthermore, the wettability of the PANI/CCT is reversibly varied from super-hydrophobic to super-hydrophilic induced by acidity.2. PANI-coated conducting polyester and cotton cospinning textile (PANI/CPCCT) with the biggest water contact angle(CA) of 162°was prepared via in-situ polymerization in the presence of Sodium p-Perfluorous Nonenoxybenzenesulfonate (OBS) as the dopant and a novel polyester and cotton cospinning textile (PCCT) with crisscross section and a lot of gaps on the fiber surfaces as the substrate respectively. Moreover, the detect results show that the surface resistance (SR) increases gradually with the increase of the pH value, but the CA is on the contrary. When pH value increases from 1 to 11, the SR of PANI/CPCCT is in the range of 104?/cm2 to 107?/cm2 and CA is in the range of 120°~165°. When pH>12, PANI/CPCCT become to insulator and its CA become to 0°. This reveals that the wettability and conductivtity of the prepared PANI/CPCCT have a certain of alkali-proof property. At the same time, the color of PANI/CPCCT has reversible conversed among duck green, blue green, duck blue, and brown due to the different doping degree in different pH. Furthermore, the wettablity of PANI/CPCCT can quickly and reversibly converse between super-hydrophobic and super-hydrophilic induced by acidity. Importantly, the resulted PANI/CPCCT presented a certain of electrochromic property in the range of 0.4V to 1.6V, and the color varied reversibly from blue green (1.03V) to duck green (1.38V). Furthermore, the PANI/CPCCT also shows good washing-proof property, and its property can be recovered only by immersed it into the solution with pH=1. All the above good functions make PANI/CPCCT taking on a potential application in acidity-controlled wettability switcher, self-cleaning textile and acidity detect and so on .3. The Coating PANI-Cu/CPCCT was prepared using the PANI, Cu and PVA composite through the coating method. The research results show that its average electromagnetic shielding effectivity and electromagnetic shielding ratio is higher than 25dB and 94.38% respectively, from 30 to 1500MHz, showing a certain of electromagnetic shielding property.