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    马芳, 李莉, 王杰, 刘建佳, 郭旭虹. 基于γ-环糊精包合作用的大分子自组装网络及其流变性能调控[J]. 华东理工大学学报(自然科学版), 2011, (3): 268-273.
    引用本文: 马芳, 李莉, 王杰, 刘建佳, 郭旭虹. 基于γ-环糊精包合作用的大分子自组装网络及其流变性能调控[J]. 华东理工大学学报(自然科学版), 2011, (3): 268-273.
    MA Fang, LI Li, WANG Jie, LIU Jian-jia, GUO Xu-hong. Rheological Property Modulation of Polymer Networks Based on γ-Cyclodextrin Inclusion Association[J]. Journal of East China University of Science and Technology, 2011, (3): 268-273.
    Citation: MA Fang, LI Li, WANG Jie, LIU Jian-jia, GUO Xu-hong. Rheological Property Modulation of Polymer Networks Based on γ-Cyclodextrin Inclusion Association[J]. Journal of East China University of Science and Technology, 2011, (3): 268-273.

    基于γ-环糊精包合作用的大分子自组装网络及其流变性能调控

    Rheological Property Modulation of Polymer Networks Based on γ-Cyclodextrin Inclusion Association

    • 摘要: 将γ-环糊精(γ-CD)和3种不同长度烷基(Cn,n为12,16,18)分别按照一定的接枝率接枝于聚丙烯酸链上,利用环糊精与疏水烷基链之间的包合作用,成功制备了大分子自组装网络,并利用流变学手段对影响高分子网络结构的因素进行了系统研究。结果表明:γ-CD与Cn之间的包合作用主要以1∶2的量化模式进行,即1个γ环糊精空腔可以同时穿入2条烷基链。当聚合物的质量分数较低时(w≤1.7%),聚合物之间以包合作用交联为主;随着聚合物质量分数的增加并超过临界浓度,疏水缔合作用产生且迅速增大,并最

       

      Abstract: γ-Cyclodextrin (γ-CD) and three alkyl groups (C12, C16, C18) with different lengths were grafted onto poly(acrylic acid) (PAA). Polymer networks were prepared by mixing γ-CD and Cn(n=12, 16, 18) modified PAA based on the inclusion associations between alkyl and γ-CD grafts. Rheological method was employed to study the properties of polymer networks. The γ-CD/alkyl inclusion compounds were formed at a stoichiometric ratio of 1:2, i.e. two alkyl groups entered into one γ-CD cavity.At low polymer concentration (w≤1.7%), the inclusion associations between γ-CD and alkyl grafts were dominated while the hydrophobic associations among the hydrophobic alkyl groups became stronger upon increasing polymer concentration. Viscosity of polymer solutions could be modulated by addition of γ-CD and surfactant SDS and thus regulating the structure of polymer networks.

       

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