Nanodiamond reinforced self-healing and transparent poly(urethane-urea)protective coating for scratch resistance  

作　　者：Zhuochao Wang Wenxin Cao Chunqiang Sun Dongchao Ji Kunlong Zhao Gang Gao Xingchun Xu Yingqi Liu Tianyu Zhang Jiaqi Zhu Jiecai Han 

机构地区：[1]National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin,China [2]School of future technology,Harbin institute of Technology,Harbin,China [3]Key Laboratory of Micro-systems and Micro-structures Manufacturing,Ministry of Education,Harbin,China

出　　处：《International Journal of Smart and Nano Materials》2024年第1期75-94,共20页国际智能和纳米材料杂志（英文）

基　　金：supported by the Fundamental Research Funds for the Central Universities[Grant No.HIT.0CEF.2022011];National Science Fund for Distinguished Young Scholars[Grant No.51625201];National Youth Science Funds of China[Grant No.52102039];Key Research and Development Program of Heilongjiang Province[Grant No.GA21D001,2022ZX06C05].

摘　　要：With increasing demand for scratch-resistant flexible electro-nics,the development of transparent coatings with good scratch resistance and self-healing properties has emerged as a key research topic.In this study,a high-strength self-healing poly(urethane-urea)(PUU)-based nanocomposite coating was prepared by introducing functionalized nanodiamond(ND)into a PUU matrix via solution blending.The PUU matrix had hard-segment repeating units and was constructed using iso-phorone diamine and isophorone isocyanate.The ND particles were modifed using a silane coupling agent,3-aminopropyl-triethoxysilane,to obtain well-dispersed KH-ND nanoparticles.KH-ND promoted microphase separation in the PU matrix,inducing the formation of dense and homogeneous hard domains that dissipated stress,prevented further crack devel-opment,and improved the mechanical properties and scratch resistance of the coating.In addition,the coating exhibited excellent self-healing properties.Fourier-transform infrared spectroscopy,scanning electron microscopy,and atomic force microscopy were used to characterize the self-healing and hardening mechanisms of the coating.The environmentally friendly PUU/KH-ND coating is easy to prepare and has broad application prospects in transparent and anti-scratch coatings for flexible electronics,automobiles,and home appliances.

关 键 词：Nanocomposite coatings SELF-HEALING scratch resistance transparent poly(urethane-urea) 

分 类 号：TB383[一般工业技术—材料科学与工程]