摘要
制备聚己内酯改性O-磺化壳聚糖(HSCS-gPCL),用FT-IR、EA和1 H NMR对产物进行表征,并研究其与胆固醇的混合单分子膜性质。结果表明,单组份HSCS-g-PCL单分子膜π-A曲线为膨胀型,而混合单分子膜则转变为凝聚型并均具有明显LE-LC相转变;随着胆固醇含量的增加,混合单分子膜的崩溃压和极限分子面积降低,最大压缩模量增大;胆固醇摩尔分数为0.6时两组份分子间作用力从相互排斥转为相互吸引,为0.8时,体系超额自由能ΔGexc最小,两组份间相容性最好,体系最稳定。
O-sulfonated chitosan-graft-poly（ε-caprolactone）（HSCS-g-PCL）was synthesiz- ed and the structure of it was characterized by FT-IR,1 H NMR and EA.The properties of mixed monolayers of HSCS-g-PCL and cho-lesterol were studied.Experimental results indicated that when cholesterol was added,the π-A isotherms of the HSCS-g-PCL monolayer turned from expand type into condensation type and had obvious LE-LC phase transi-tion.As the cholesterol molar ratio increased,collapse pressure and the limiting molecular area of mixed mono-layers decreased,meanwhile maximum compression modulus increased.The value of Δ exc changed from an re-pulsive interaction to an attractive interaction between HSCS-g-PCL and cholesterol with a critical point when cholesterol molar ration was 0.6.When molar ratio of cholesterol was 0.8,Δ exc of mixed monolayers was mini-mum and the mixed monolayer was the most stable.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第15期15031-15035,15040,共6页
Journal of Functional Materials
基金
科技部科技人员服务企业资助项目(2009GJC40030)
福建省重点科技资助项目(2009H0030)
福建省自然科学基金资助项目(2011J01312,2012J01396)
关键词
壳聚糖
磺化
聚己内酯
胆固醇
单分子膜
chitosan
sulfonated
poly（ε-caprolactone）
cholesterol monolayer
