作　　者： ; ; ;

机构地区： 复旦大学材料科学系

出　　处： 《高等学校化学学报》 2007年第12期2408-2412,共5页

摘　　要： 采用溶胶-凝胶方法,无需小分子酸催化剂,利用硅烷化植酸的反应活性和酸催化活性,与硅烷单体共水解缩聚,在聚有机硅倍半氧烷分子链上原位接枝植酸,合成了分子量大于50000的大分子植酸-聚有机硅倍半氧烷.用GPC,13C NMR,29Si NMR,XPS,Raman光谱,SEM及电化学测试等分析手段进行表征,对比不同酸催化植酸-聚有机硅倍半氧烷(PAP),单宁酸-聚有机硅半氧烷(TAP),盐酸-聚有机硅半氧烷(HCP)的结构和性能,发现植酸-聚有机硅倍半氧烷上的螯合基团与金属表面的活性基团反应而键合,在金属表面形成致密的保护膜,PAP与TAP和HCP比较具有优异的防腐性能. The high-molecular-weight phytic acid-polysilsesquioxane was successfully synthesized via sol-gel process by using silylated phytic acid reacting with MTES and TEOS without any low molecular acid, and the molecular weight of phytic acid-polysilsesquioxanes was more than 50000. Phytic acid served not only as catalysts but also reactant and chelating agent, which was in-situ incorporated with polysilsesquioxane chain uniformly. GPC,^13C NMR,^29Si NMR,XPS,Raman spectrum, SEM and electro-chemical techniques were used to investigate the correlation between the microstructure and property of PAP, TAP and HCP. PAP could form a compacting protective film because of strong chemical interaction between metal substrate and phytic acidpolysilsesquioxane, which had a significantly better corrosion resistance compared to tannin-catalyzed polysilsesquioxane and HCl-catalyzed polysilsesquioxane.

关 键 词： 酸性螯合剂 植酸 聚有机硅倍半氧烷 防腐蚀

领　　域： [理学] [理学]