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采用原位吸附聚合法,使吡咯单体在有机硅聚氨酯(TESO)乳胶表面吸附聚合制备了导电复合材料,研究了投料比、投料顺序及反应条件等对有机硅聚氨酯导电性能的影响。结果证明:吡咯用量12.5%,FeCl3、蒽醌-2-磺酸钠与吡咯摩尔比为2.2∶2.5∶1,投料顺序为TESO-吡咯-蒽醌-2-磺酸钠-FeCl3,反应温度0℃,pH=3,制备的复合材料导电效果最佳。TESO乳胶中的Si与导电聚吡咯具有协同效果,利于聚吡咯与TESO形成互通网络结构,在TESO乳胶表面或界面处形成连续核壳型导电聚合物膜层。
In situ adsorption polymerization was used to prepare pyrrole monomer on the surface of silicone polyurethane (TESO) emulsion to prepare conductive composites. The influence of the ratio of feed, the order of reaction and the reaction conditions on the electrical conductivity of organosilicon polyurethane were investigated. The results showed that the dosage of pyrrole was 12.5%, the molar ratio of FeCl3 and anthraquinone-2-sulfonate to pyrrole was 2.2: 2.5: 1, and the order of feeding was TESO-pyrrole-anthraquinone-2-sulfonate-FeCl3. The reaction temperature was 0 ℃, pH = 3, the best conductivity of the prepared composite material. Si in TESO latex has the synergistic effect with conductive polypyrrole, which facilitates the formation of intercommunication network structure between polypyrrole and TESO, and forms a continuous core-shell conductive polymer film layer on the surface or interface of TESO latex.