高等学校化学学报

高等学校化学学报

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大分子植酸-聚有机硅倍半氧烷的合成及性能

游波, 邢文涛, 武利民   

  1. 复旦大学材料科学系, 上海 200433
  • 收稿日期:2007-06-07 修回日期:1900-01-01 出版日期:2007-12-10 发布日期:2007-12-10
  • 通讯作者: 游波

Preparation and Properties of Macromolecule Phytic Acid-Polysilsesquioxane

YOU Bo*, XING Wen-Tao, WU Li-Min   

  1. Department of Materials Science, Fudan University, Shanghai 200433, China
  • Received:2007-06-07 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10
  • Contact: YOU Bo

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被引次数

6

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.

关键词: 酸性螯合剂, 植酸-聚有机硅倍半氧烷, 防腐蚀

Abstract: 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 acid-polysilsesquioxane, which had a significantly better corrosion resistance compared to tannin-catalyzed polysilsesquioxane and HCl-catalyzed polysilsesquioxane.

Key words: Acidic chelant, Phytic acid-polysilsesquioxane, Anticorrosion

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