CAJ | 학술논문

制备聚己内酯改性 O-磺化壳聚糖(HSCS-g-PCL)，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Δ exc 最小，两组份间相容性最好，体系最稳定.
제비취기내지개성 O-광화각취당(HSCS-g-PCL)，용 FT-IR、EA 화1 H NMR 대산물진행표정，병연구기여담고순적혼합단분자막성질.결과표명，단조빈 HSCS-g-PCL 단분자막π-A 곡선위팽창형，이혼합단분자막칙전변위응취형병균구유명현 LE-LC상전변；수착담고순함량적증가，혼합단분자막적붕궤압화겁한분자면적강저，최대압축모량증대；담고순마이분수위0．6시량조빈분자간작용력종상호배척전위상호흡인，위0．8시，체계초액자유능Δ exc 최소，량조빈간상용성최호，체계최은정.
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.