摘要
以多官能团树枝状聚酯多元醇(H3OP)为内核,通过原位聚合形成聚氨酯预聚体为内层,分散重氮黑3BF(3BF,CAS:6232-57-1)原位交联形成外层制备出可自修复的黑色聚氨酯(PU-3BF)。通过吸收光谱表征确定聚氨酯的结构以及分散重氮黑3BF(3BF)接入聚氨酯链。利用DSC和TG分别研究其玻璃化转变温度以及热稳定性。研究表明PU-3BF自修复过程主要通过N—H和■之间氢键形成来完成的。在室温下可多次重复修复,随着修复次数增加,材料修复效率和性能影响不明显。
In this paper,self-healing black polyurethane (PU-3BF) was prepared by using dendritic polyester polyol (H3OP) with multi-functional groups as the core.The polyurethane prepolymer was formed into an inner layer by an in situ polymerization.The outer layer was formed by dispersing diazo black 3BF (3BF,CAS: 6232-57-1) in situ crosslinking. The expected structure of PU-3BF was characterized by FT-IR and UV-Vis spectra. The glass transition temperature and thermal stability of polyurethane were studied by DSC and TGA. The self-healing mechanism and property of PU-3BF were studied. The results showed that PU-3BF could be repaired repeatedly at room temperature,and with the increase of self-healing times,the effect on the self-healing efficiency and performance was not obvious.
作者
胡先海
李根
咸玉席
刘翔
李明君
胡鹏威
HU Xianhai;LI Gen;XIAN Yuxi;LIU Xiang;Li Mingjun;HU Pengwei(School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230061,China;CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China,Hefei 230026,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第5期5128-5131,5137,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51573001)
关键词
自修复
黑色聚氨酯
氢键
热稳定性
self-healing
black polyurethane
hydrogen bonds
thermal stability
