检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]武汉大学化学与分子科学学院/生物医用高分子材料教育部重点实验室,湖北武汉430072
出 处:《武汉大学学报(理学版)》2006年第4期391-395,共5页Journal of Wuhan University:Natural Science Edition
基 金:国家自然科学基金资助项目(20174029);国家重点基础发展规划资助项目(2005CB623903)
摘 要:采用互穿聚合物网络(IPN)技术合成了以魔芋葡甘聚糖(KGM)和聚(N-异丙基丙烯酰胺)(PNIPA)为组分的IPN凝胶,对所得凝胶结构进行了红外光谱分析.讨论了不同反应条件对产物凝胶溶胀性能和去溶胀性能的影响,观察到IPN凝胶的较低临界溶解温度约为31℃.当外界温度从20℃迅速转变为37℃时,凝胶在5 min内快速收缩,大量失水,表现出良好的温度敏感性.体外降解实验结果显示IPN凝胶选择性地被β-糖苷酶以较高速率降解,且凝胶降解率随着KGM含量的增加而增加,即这种新型的IPN凝胶同时具备了KGM的生物可降解性和酶降解特异性,以及PNIPA的温度敏感性.IPN hydrogels based on konjac glucomannan (KGM) and poly (N-isopropylacrylamide) (PNIPA) were prepared by adsorption of a solution of NIPA monomer with cross-linker N, N'-methylenebisacrylamide (BIS) and initiator into a pre-fabricated dried KGM gel. The factors influencing the swelling and deswelling behavior of the IPN hydrogels were studied. The lower critical solution temperature (LCST) approved the thermo-sensitivity of obtained IPN hydrogels. The deswelling kinetics of hydrogels displayed a fast thermo-response rate and the deswelling equilibrium can be reached within 30 min when the hydrogels were transferred from 20 ℃ water into 37 ℃ water. The KGM component in the IPN can be de graded rapidly by β-glycosidase Mannaway25L. The results indicate that the IPN hydrogels remain the thermo-sensitivity of PNIPA and the biodegradation of KGM.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.249