可逆双交联网络自修复聚氨酯的制备与性能研究  

Preparation and Performance of Self-healing Polyurethane with Reversible Dual Cross-linked Networks

作　　者：王勇[1] 刘若凡 金玉顺[1] 丁伟 伍一波[1] WANG Yong;LIU Ruofan;JIN Yushun;DING Wei;WU Yibo(Beijing Key Laboratory of Special Elastomer Composites,School of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院新材料与化工学院,特种弹性体复合材料北京重点实验室,北京102617

出　　处：《皮革科学与工程》2025年第1期15-22,共8页Leather Science and Engineering

基　　金：国家自然科学基金(52303002);大学生研究训练计划(2023X00149)。

摘　　要：通过物理交联法制备一系列由可逆双硫键聚合物单交联网络和可逆-Fe^(3+)配位键聚合物单交联网络组成的双交联网络聚氨酯弹性体,得到可逆双交联网络互锁自修复聚氨酯材料(FSN)。该材料利用可逆双键网络中的二硫键和Fe^(3+)配位键网中的金属配位键互穿互锁,形成两个单交联网络协同的可逆双交联网络自修复弹性体材料。研究了双交联网络的自修复能力和力学性能,实验结果表明,FSN网络的机械应力达到3.5 MPa;聚合物自修复效率高达80%以上。该结果证明两个单交联网络间存在协同作用,使得FSN比单一可逆聚合物网络在力学性能和自修复能力方面均有显著提升。A series of double-crosslinked polyurethane elastomers were prepared by physically crosslinking a singlecrosslinked network of reversible disulfide-bonded polymers and a single-crosslinked network of reversible Fe^(3+)-coordination-bonded polymers.Through this,reversible double-crosslinked network interlocked self-repairing polyurethane materials were obtained and named as FSN.This kind of material utilized the disulfide bonds in the reversible double bond network and the metal coordination bonds in the Fe^(3+)-coordination-bonded network to interpenetrate and interlock,thus forming a reversible double crosslinked network self-repairing elastomer material with the synergistic action of the two single crosslinked networks.The self-healing ability and mechanical properties of the double crosslinked networks were investigated,and the experimental results showed that the mechanical stress of the FSN network reached 3.5 MPa,and the self-healing efficiency of the polymer was more than 80%.This result demonstrates that there is a synergistic effect between the two single-crosslinked networks,which results in a significant increase in the mechanical properties and self-healing ability of FSN over a single reversible polymer network.

关 键 词：聚氨酯 自修复聚合物 双交联网络 金属配位键 二硫键 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]