三甲基硅羟乙基纤维素醚的合成、表征及性能

Synthesis,characterization and property of hydroxyethyl cellulose trimethylsilylated derivatives

通过羟乙基纤维素(HEC)与六甲基二硅胺烷的反应,对水溶性物质HEC三甲基硅化改性,以改善其脂溶性。用红外光谱和扫描电镜(SEM)分析了产物的结构和表面形貌,并用热质量分析(TGA)、示差扫描量热(DSC)对改性产物的热性能进行了表征,应用霉菌法进行了生物降解性能实验。结果表明,HEC经硅化改性后,脂溶性得到改善;热分解温度显著提高,热稳定性得到增强;通过观测产物经过霉菌不同时间降解后的表面形貌,证明羟乙基纤维素三甲基硅醚具有生物降解性。

Water miscible hydroxyethyl cellulose （HEC） was modified to increase its fat-solubility by reacting with hexamethyldisilazan. Its synthetic product is trimethylsilyl hydroxyethyl cellulose （TMSHEC）. The structure and the surface feature of TMSHEC were characterized by infrared spectra （IR） and scanning election microscope （SEM）, the properties were investigated by thermogravimetic analysis （TGA）, differential scanning calorimetry （DSC） and mould degradation. The results of TGA and DSC show that the thermal stability and fat-solubility of trimethylsilyl modification cellulose gives rise to a clear improvement. And the mould degradation preliminary experiment proves that the TMSHEC can be biodegraded. [ Ch, 8 fig. 4 tab. 11 ref.]