乙烯基封端型氧化石墨烯和碳纳米管复合聚氨酯UV固化树脂的合成与性能  

Synthesis and Properties of Vinyl-terminated Graphene Oxide and Carbon Nanotube Composite Polyurethane UV Resins

作　　者：夏贤良 娄育培 李道壮 吴晓静 李再峰[1] XIA Xianliang;LOU Yupei;LI Daozhuang;WU Xiaojing;LI Zaifeng(College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao,Shandong 266042,China)

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《涂料工业》2025年第2期32-37,共6页Paint & Coatings Industry

基　　金：国家自然科学基金项目(22478215);山东省自然科学基金项目(ZR202110180024);创新领军人才项目(tscx202408087)。

摘　　要：为提高聚氨酯紫外光固化涂料的力学性能和导电性,基于聚氨酯化学反应,采用异佛尔酮二异氰酸酯(IPDI)和甲基丙烯酸羟乙酯(HEMA)对氧化石墨烯(GO)实现了化学接枝,制备出新型氧化石墨烯(HEMA@GO)。探讨了HEMA@GO和多壁碳纳米管(MWCNTs)协同复合对聚氨酯基UV固化涂层的机械强度和导电性的影响。结果表明:化学接枝型氧化石墨烯的层间距由接枝前的0.89 nm扩大到2.10 nm,改善了GO在聚氨酯基体中的分散能力和界面相互作用;当HEMA@GO和MWCNTs的添加量分别为1.0%、3.0%时,聚氨酯膜的拉伸强度和涂层硬度达到了最佳,分别为13.6 MPa和6H。此外,HEMA@GO和MWCNTs的协同作用,显著降低了聚氨酯涂层的方块电阻,从空白涂层的1012 kΩ/□降至7.1 kΩ/□,展现出优异的导电性和力学性能提升效果。To enhance the mechanical properties and electrical conductivity of polyurethane UV-cured coatings,by the chemistry reaction for polyurethane,isophorone diisocyanate(IPDI)and hydroxyethyl methacrylate(HEMA)were employed to prepare the chemical graft graphene oxide,such as a novel HEMA-grafted graphene oxide(HEMA@GO).The synergistic effect of HEMA@GO and multi-walled carbon nanotubes(MWCNTs)on the mechanical properties and electrical conductivity of the polyurethane UV-cured coatings was investigated.The results showed that the interlayer space of the functionalized GO expanded from 0.89 nm of GO to 2.10 nm,and both the dispersion and interfacial bonding between GO and the polyurethane matrix were enhanced significantly.With an increase of carbon materials in content,the tensile strength and hardness of the films increased initially and then declined.The optimum tensile strength of 13.6 MPa and hardness of 6H were achieved with the mixture HEMA@GO and MWCNTs at 1.0%and 3.0%,respectively.Moreover,the synergistic effect of HEMA@GO and MWCNTs made the square resistance of the polyurethane coating decrease significantly,decreasing it from 10^(12)kΩ/□for the unmodified sample to 7.1 kΩ/□.This results highlighted the substantial enhancement in both electrical conductivity and mechanical performance.

关 键 词：聚氨酯UV固化树脂 改性氧化石墨烯 多壁碳纳米管 力学性能 导电性 

分 类 号：TQ637.83[化学工程—精细化工]