【摘要】 通过三甲基硅(TMS)基团改性保护技术,成功制备了羟乙基纤维素(HEC)接枝聚己内酯(HEC-g-PCL)聚合物,利用红外光谱及核磁共振波谱对合成产物进行了结构验证。利用微生物降解法与活性淤泥法分别对HEC-g-PCL进行了生物降解实验。结果表明,经过霉菌不同时间降解,扫描电子显微镜(SEM)观测产物的表观形貌发生了明显变化;活性淤泥降解HEC-g-PCL产物表明,HEC-g-PCL在中性淤泥状具有自然活性的土壤中,经四周时间,降解率达到8.0%。更多还原

【Abstract】 The graft copolymer(HEC-g-PCL) was successfully prepared by using the synthetic technique of trimethylsilyl(TMS) protection groups,and the structure of graft copolymer(HEC-g-PCL) was characterized by IR and NMR.The biodegradation test of HEC-g-PCL was carried out by using microbiological deterioration method and active silt degradation method,respectively.The results show that the surface topography of HEC-g-PCL,which was observed with the scanning electronic microscope(SEM) has changed remarkable after a given degradation time by Aspergillus niger;the degradation rate of HEC-g-PCL in silt-form soil with natural activity reaches the level of 8.0% by using bi-indicator titration method after four weeks.These obtained results indicate that the biodegradability of synthetic graft copolymer(HEC-g-PCL) is notable.更多还原