环糊精准多轮烷改性聚氨酯材料的结构与性能

环糊精准多轮烷改性聚氨酯材料的结构与性能 Structure and Properties of Polyurethane Nanocomposites Filled with Cyclodextrin-Based Pseudo-Polyrotaxanes 范红蕾 FAN Honglei1 1 2 first-author 黄进 HUANG Jin2 2 翟智 ZHAI Zhi 2 2 王大新 WANG Daxin1 1 余家会 YU Jiahui 3 3 扬州大学江苏省苏北人民医院 扬州大学江苏省苏北人民医院 Northern Jiangsu People’s Hospital of Jiangsu Province,Yangzhou University Northern Jiangsu People’s Hospital of Jiangsu Province,Yangzhou University 武汉理工大学化学工程学院 武汉理工大学化学工程学院 College of Chemical Engineering,Wuhan University of Technology College of Chemical Engineering,Wuhan University of Technology 华东师范大学科学与技术跨学科高等研究院 华东师范大学科学与技术跨学科高等研究院 Interdisciplinary Science and Technology Institute for Advanced Study,East China Normal University Interdisciplinary Science and Technology Institute for Advanced Study,East China Normal University 在合成聚氨酯的反应初期（方式Ⅰ）和预聚反应过程中（方式Ⅱ）加入环糊精超分子准多轮烷（PR）,制备出一系列环糊精准多轮烷改性聚氨酯复合材料（PU/PRs）.环糊精准多轮烷使聚氨酯（PU）材料的拉伸强度、断裂伸长率和杨氏模量同步提高.其中,采用方式Ⅰ并控制多轮烷质量分数为0.73%,拉伸强度和断裂伸长率达到最大值,分别是纯聚氨酯的1.8和1.7倍.力学性能的提高主要归因于环糊精超分子准多轮烷的均匀分散并与基质形成的拓扑交联网络结构,即β-环糊精（β-CD）贯穿聚丙二醇（PPG）链段的多轮烷通过PPG的端羟基和环糊精分子的羟基与异氰酸酯基的反应融入聚氨酯基质的网络结构.但是,过高的准多轮烷含量不利于聚氨酯材料力学性能的提高. A series of polyurethane（PU）-based nanocomposites were prepared by incorporating the cyclodextrin-based pseudo-polyrotaxanes（PRs）at the beginning of the reaction（MethodⅠ）and 1hafter pre-polymerization（MethodⅡ）.It is worth noting that the resultant PU/PR nanocomposites showed significant enhancements in strength,elongation and Young’s modulus.Especially,when the content of PRs was regulated as 0.73%and the MethodⅠ was used,the strength and elongation reached the maximum values as 1.8and 1.7-fold over those of neat PU.The enhancement of mechanical performances was attributed to the rigidity of the homogeneous dispersed PRs and the formed topological network.The formation of topological network depended upon the reaction of the—OH on theβ-CD and the terminated—OH of included PPG chain with—NCO in the PU matrix.However,the relatively higher loading level of the PR inhibited the enhancement of mechanical performances. 环糊精 准多轮烷 聚氨酯 cyclodextrin pseudo-polyrotaxane polyurethane 10.14188/j.1671-8836.2010.05.012 O633.14 国家重点基础研究发展计划（973）国家纳米重大研究计划项目（2007CB936104）;武汉市青年科技晨光计划项目（200850731383） 2010-05-01 2021-04-01 5 56