中南大学学报（自然科学版）2011，Vol.42Issue(4)：928-933,6.
不同溶剂对医用聚氨酯/壳聚糖粉体共混膜结构的影响
Influence of different solvents on structure of CSP/BPU blended membranes
摘要
Abstract
Asymmetric blend membranes of chitosan superfine powder and biomedical polyurethane were prepared by immersion-precipitation phase inversion method. The effects of different solvents on the thermodynamics of casting solutions, structure and properties of blended membranes were investigated. The formation of membrane structures was researched in term of the thermodynamics and kinetic diffusion. The results show that the gelation values of three casting solutions from large to small are DO, DMAc and DMF. The pore diameter of upper surface, bottom surface and cross-section of blend membranes from large to small are DMAc, DMF and DO. The change of swelling degree and water vapor transmission rate of three blend membranes is in accordance with that of membrane pore.关键词
共混多孔膜/壳聚糖微粉/聚氨酯/势力学/扩散Key words
blend porous membrane/ chitosan superfine powder/ biomedical polyurethane/ thermodynamics/ diffusion分类
化学化工引用本文复制引用
左丹英,徐卫林,王琰..不同溶剂对医用聚氨酯/壳聚糖粉体共混膜结构的影响[J].中南大学学报（自然科学版）,2011,42(4):928-933,6.基金项目
国家重大基础研究发展计划("973"计划)项目(2009CB526402) （"973"计划）
湖北省教育厅科研计划项目(B20091704) （B20091704）
