离子型聚乙烯醇海绵的结构及性能  

Structure and properties of ionic PVA sponges

作　　者：孙瑞焕[1] 毛立江[1] 胡元洁[1] 张颖[1] 王青[1] 朴东旭[1] 

机构地区：[1]中国康复研究中心医用高分子研究室,北京100077

出　　处：《中国康复理论与实践》2000年第2期56-58,共3页Chinese Journal of Rehabilitation Theory and Practice

摘　　要：以聚乙烯醇 ( PVA)为原料 ,采用缩醛化、发泡成型、接枝聚合的方法 ,制造了多孔泡沫海绵状吸液材料 :离子化聚乙烯醇海绵 ( i- PVA海绵 )。结构分析表明 ,i- PVA海绵具有三维多孔织构 ,由于引入了大量的阴离子基团 ,i- PVA海绵具有优异的吸液性能。临床使用证明 ,i- PVA海绵可用于白内障复明手术中的特殊用途。A new kind of medical sponges,ionic polyvinyl alcohol sponges(i-PVA sponges)were prepared by surface-grafting of acrylic acid onto acetal-PVA sponges.i-PVA sponges obtained show excellent hydrophilicity and water-absorption.The i-PVA sponges are three dimentional porous network.Because there are great amount of carboxyl and sodium carboxylate groups on PVA molecule chains,the speed of water absorption and water-absorptivity is >2.9mm/s and >15 times respectively.That is,in the case of the cataract-extraction,the polyion-modified sponges much more advantageous than any traditional nonionic polymer sponges.

关 键 词：离子化氯乙烯醇海绵 吸液性能 白内障 复明 

分 类 号：R776.105[医药卫生—眼科]