XU Jian, YANG Liming, WANG Yujun, et al. 介孔分子筛SBA-15表面改性对脂肪酶固定化的强化作用[J]. CIESC Journal, 2006, (10).DOI:
介孔分子筛SBA-15表面改性对脂肪酶固定化的强化作用
摘要
Abstract
Three kinds of support for enzyme immobilization were prepared by modifying SBA-15 mesoporous silica with thiol,methyl and hexyl groups respectively.The prepared supports were characterized with FT-IR and BET method and exhibited high specific surface area and uniform pore size.Furthermore,unmodified SBA-15 and the modified SBA-15 materials were used for lipase immobilization.The results were compared in terms of enzyme adsorption capacity,activity,activity retention and stability.The modified SBA-15 materials with thiols(SBA-15-PrSH)showed good performance for lipase immobilization.Compared with unmodified SBA-15,the adsorption capacity of SBA-15-PrSH to lipase was improved by more than 80%,and the activity retention increased by more than 10%.