纤维素-聚苯胺导电复合材料的非均相制备及其导电性能分析-heterogeneous preparation and electrical conductivity analysis of cellulose - polyaniline posites.docx

Abstract
external layer (S1) of the cellulose surface and the nudity of secondary wall middle layer (S2). PANI homogeneously dispersed on the cellulose surface in the form of particals in posites prepared with cellulose pretreated by ultrasonic. In reverse, the PANI particals loaded on the surface of untreated cellose with evident aggregation. Because of aggregation, it was difficult for PANI to have a thorough oxidate position. This phenomenon induced more PANI residual U than posites mentioned above. From the FTIR spectra, it verified that there was no difference between these posites. It indicated that ultrasonic force did not lead to the variation of the chemical structure of celluose. TG curves revealed that the thermal stability of PANI-posites was enhanced than pure cellulose due to the protection of PANI particals deposited on its surface. Ultrasonic force benefited for the PANI content in posites. Nevertheless, the difference
between the content of PANI in posites became smaller and smaller。The electrical
conductivity was similar to PANI content .
3. NanoAg/posite was firstly synthesized by ultrasonic method, and the cellulose/Ag/posite was essfully prepared by chemical oxidate polymerization of aniline secondly in this chapter. The results indicated that only less nanoAg particles was incorporated on cellulose by ultrasonic method and the nanoAg particles were about 50nm. However, just because of these less nanoAg particles, the
thermal stablity of posites was 50℃ higher than pure cellulose. NanoAg particles
was gradually coated by PANI with the increasing of the oxidate polymerization of aniline. PANI containing nanoAg particles was deposited on the cellulose surface in the form work. This structure contributed to the forming of electrical work and improving of the electrical conductivity of posites. The electrical conductivity of cellulose/Ag/PANI posites increased one magnitude than posite cellulose-PANI with same synthesis conditions. It reveale