纳米填料增强聚脲胶粘剂的高温粘接性能  

High-temperature bonding performance of nano filler enhanced polyurea adhesive

作　　者：古云松 张平[1] 吴冶平[2] 张银宇 Gu Yunsong;Zhang Ping;Wu Yeping;Zhang Yinyu(Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)

机构地区：[1]西南科技大学,四川绵阳621010 [2]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《中国胶粘剂》2025年第4期26-32,共7页China Adhesives

摘　　要：本研究通过引入纳米填料来限制高分子链的运动,以提高聚脲胶粘剂在高温下的粘接强度。重点分析了不同纳米填料对聚脲胶粘剂的热稳定性和线性热膨胀系数的影响。研究结果表明:(1)特定含量的纳米填料可以显著提高聚脲样品的热稳定性,尤其是在添加量为10%的白炭黑或氨基化碳纳米管时,能在50~150℃的范围内有效地降低线性热膨胀系数。(2)白炭黑的添加在一定程度上增强了聚脲样品的热稳定性,但对于粘接性能的提升作用并不明显。(3)当添加量为15%的氨基化碳纳米管时,在80和130℃下都展现出卓越的粘接性能,粘接性能的提升最为显著,对304不锈钢表现出较佳的粘接效果。这些发现为聚脲胶粘剂在高温环境下的应用提供了重要的理论依据和试验支持。Nano fillers were introduced in this study to restrict the movement of polymer chains and improve the bonding strength of polyurea adhesive at high temperature.The influence of different nano fillers on the thermal stability and linear coefficient of thermal expansion of polyurea adhesive was analyzed in details.The research results showed,(1)Specific content of nano fillers could significantly improve the thermal stability of polyurea samples,especially when adding 10%white carbon black or aminated carbon nanotubes,which could effectively reduce the linear coefficient of thermal expansion in the range of 50-150℃.(2)The addition of white carbon black enhanced the thermal stability of polyurea samples to a certain extent,but its effect on improving bonding performance was not significant.(3)When the amount of aminated carbon nanotubes added was 15%,excellent bonding performance was exhibited at 80 and 130℃,with the most significant improvement in bonding performance,showing excellent bonding effect on 304 stainless steel.These findings provided important theoretical basis and experimental support for the application of polyurea adhesive in high-temperature environments.

关 键 词：纳米填料 聚脲胶粘剂 热稳定性 线性热膨胀系数 高温粘接性能 

分 类 号：TQ437[化学工程]