金属交联羧甲基羟丙基纤维素反应的研究

 使用新型有机钛络合物交联羧甲基羟丙基纤维素(CMHPC),仍得凝胶具备较高的耐温性,热分析结果亦表明交联产物有良好的热稳定性。对有机钛及其它一些金属离子交联CMHPC反应的行为和红外谱图分析显示,CMHPC与金属离子作用时,不仅由羧甲基提供活性络合部位,而且羟丙基也参予反应,交联机制受取代度和反应条件的影响。

STUDY ON METAL CROSSLINKED CARBOXYMETHYL HYDROXYPROPYL CELLULOSE

Carboxymethyl hydroxypropyl cellulose (CMHPC) crosslinked with a novel organic titanium exhibits good thermal stability determined by Thermogravimetry (TG) and Differential Thermogravimetry (DTG) method, and its hydrogel retains greater viscosity at high temperature. The structure of metal crosslinked CMHPC have been investigated by FTIR spectrome-try. The results show that the active crosslinking sites are not only the carboxymethyl groups, but also the hydroxypropyl groups, and the interaction model are influenced by degree of substitute of CMHPC and pH of reaction medium.