基于硅氮陶瓷前驱体的硬韧涂层制备及性能  

Preparation and Properties of Polysilazane Derived Hard Flexible Coatings

作　　者：王文悦 刘蕴钰 徐彩虹[1,2] 张宗波 WANG Wenyue;LIU Yunyu;XU Caihong;ZHANG Zongbo(Key Laboratory of Science and Technology on High-tech Polymer Materials,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 10004,China)

机构地区：[1]中国科学院化学研究所,极端环境高分子材料实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《硅酸盐学报》2024年第9期2806-2814,共9页Journal of The Chinese Ceramic Society

基　　金：基础科研项目(JCKY2020203B019)。

摘　　要：在聚合物薄膜表面施加硬韧涂层是实现其在保持轻质、柔性性能的同时,提高表面硬度和耐磨性的最有效途径。采用硅氮陶瓷前驱体-有机聚硅氮烷OPZ181与(3-氨基丙基)三乙氧基硅烷(KH550)杂化的方式制备了一种有机-无机杂化硬韧涂层,并对涂层化学结构、力学性能、微观形貌、光学透明性、耐弯折性能以及耐磨性能进行了表征。结果表明:涂层化学结构以Si—O—Si为主,并含有—CH_(3)等有机基团,CH_(3)SiO_(3)为杂化涂层主要结构。涂层铅笔硬度可达6 H,纳米压痕硬度可达0.7 GPa,模量可达5.7 GPa。涂层的塑性指数(H/E)>0.1,弹性恢复值(W_(e))>60%,具有良好的硬韧性能。涂层表面平整光滑,且具有优异的光学透明性。涂层在弯曲半径为1.5 mm和1 mm条件下,均可弯折10000次,表现出优异的耐弯折性能。涂层具有优异的耐磨性能,可以有效提高PET薄膜的耐磨性。本工作发展了一种杂化涂层设计新策略,为硬韧涂层的制备提供了一种新思路与方法。Introduction In recent years,with the rapid development of the flexible displays and wearable electronic devices,higher requirements have been placed on the performance of electronic devices,such as lightweight and flexible.Polymer films such as transparent polyimide(CPI)and polyethylene terephthalate(PET)have gained widespread attention in the field of flexible optoelectronic materials owing to their high transparency,light weight,good bendability and high mechanical strength.However,due to the characteristics of their molecular structure,polymer films generally have the problems of low surface hardness and poor abrasion resistance.Therefore,enhancing the surface hardness and abrasion resistance of polymer films without compromising their characteristics such as transparency,light weight and flexibility become an urgent problem to be solved.Among the various enhancement strategies that have been developed,applying optically transparent coatings with abrasion and bending resistance to the surface of polymer films is one of the most effective and promising approaches.Hard flexible coatings are mainly achieved by organic-inorganic hybridization to achieve both hardness and flexibility.Organic polysilazanes can retain their organic groups while forming the Si—O—Si network structure by hydrolysis condensation reaction,which can realize organic-inorganic hybridization and providing a basis for constructing hard flexible coatings.In this work,an organic-inorganic hybrid hard flexible coating was prepared at 80℃90%RH by hybridizing organic polysilazane OPZ181 with triethoxysilane(KH550).The effect of KH550 content on the conversion process of OPZ181 was investigated,and the structure and properties of the hard flexible coatings were systematically characterized.Methods Using n-butyl ether as solvent,OPZ181 and KH550 were mixed homogeneously at room temperature to obtain a colorless,transparent and clarified OPZ181/KH550 polymer precursor solution.OPZ181/KH550 hybrid coatingswere prepared by liquid-phase coating me

关 键 词：陶瓷前驱体 聚硅氮烷 有机-无机杂化 硬韧涂层 

分 类 号：TQ127.2[化学工程—无机化工]