钛酸钾晶须/硅橡胶抗静电涂层的制备与性能研究  

Preparation and properties of anti-static coating based on potassium titanate whiskers/silicone rubber

作　　者：黄海龙[1,2] 祝梁铭 罗雨涵 程靖萱 李胜华 郭凡[1,3] Huang Hailong;Zhu Liangming;Luo Yuhan;Cheng Jingxuan;Li Shenghua;Guo Fan(Hubei Institute of Aerospace Chemical Technology,Xiangyang 441003,Hubei,China;Science and Technology on Aerospace Chemical Power Laboratory,Xiangyang 441003,Hubei,China;The Key Laboratory of Emergency Rescue and Safety Protection Technology of Hubei Province,Xiangyang 441003,Hubei,China)

机构地区：[1]湖北航天化学技术研究所,湖北襄阳441003 [2]航天化学动力技术重点实验室,湖北襄阳441003 [3]应急救生与安全防护湖北省重点实验室,湖北襄阳441003

出　　处：《中国胶粘剂》2024年第10期50-55,66,共7页China Adhesives

基　　金：湖北省自然科学基金联合基金(2022CFD085)。

摘　　要：通过结合FT-3000型钛白粉与钛酸钾晶须(PTWs)的颜色与晶须结构的特点,以硅橡胶(SR)为树脂基体,采用PTWs、FT-3000作为防静电填料,制备了钛酸钾晶须/硅橡胶(PTWs/SR)浅色防静电涂层。研究了PTWs对硅橡胶抗静电涂层的抗静电性、力学性能以及热稳定性的影响,并表征了制备的PTWs/SR抗静电涂层的抗湿热老化性能,以及对不同基材的界面粘接性能。研究结果表明:(1)PTWs的晶须结构可以弥补FT-3000导电粉点状连续分布造成导电填料接触面积小的缺点,通过两者的协同作用,使得硅橡胶涂层的体积电阻进一步降低,共同形成完整度更高的导电网络。(2)PTWs/SR的抗拉强度和延伸率随PTWs用量的增加呈现增大的趋势,并在7份后提升趋于平缓。当PTWs用量为7份时,抗拉强度为5.71 MPa,延伸率为83.9%,相比于FT-3000单独填充的硅橡胶涂层,分别提高了102%和26%。(3)PTWs与FT-3000的共同作用下,PTWs/SR涂层耐热性显著提高,相对于空白硅橡胶涂层,热分解温度提高223℃。(4)PTWs/SR涂层具有优异的界面粘接稳定性,对特种橡胶、有机涂层、金属等多种材料具有良好的常、高、低温粘接性能,具有良好的适用性。(5)经过85℃、85%RH老化1000 h后,PTWs/SR涂层的力学性能有所衰减,并且延伸率的下降幅度更大,但总体可控。PTWs/SR涂层的体积电阻由5.25×10^(6)Ω·cm变化至8.19×10^(6)Ω·cm,说明其具有良好的抗湿热老化性能。By combining the color and whisker structure characteristics of FT-3000 titanium dioxide and potassium titanate shiskers(PTWs),a light colored anti-static coating of potassium titanate whiskers/silicone rubber(PTWs/SR)was prepared by using silicone rubber(SR)as the resin matrix and PTWs and FT−3000 as anti-static fillers.The effects of PTWs on the anti-static properties,mechanical properties,and thermal stability of silicone rubber anti-static coating were studied,the anti-moisture and heat aging properties of the prepared PTWs/SR anti-static coating,as well as their interfacial bonding properties to different substrates were characterized.The research results showed that,(1)The whisker structure of PTWs could compensate for the small contact area of conductive fillers caused by the continuous distribution of FT−3000 conductive powder dots.Through the synergistic effect of the two,the volume resistivity of the silicone rubber coating was further reduced,forming a more complete conductive network together.(2)The tensile strength and elongation of PTWs/SR showed an increasing trend with the increase of PTWs dosage,and the improvement tended to plateau after 7 parts.When the dosage of PTWs was 7 parts,the tensile strength was 5.71 MPa and the elongation was 83.9%,which was 102%and 26%higher than the silicone rubber coating filled with FT−3000 alone.(3)Under the combined action of PTWs and FT-3000,the heat resistance of PTWs/SR coating was significantly improved.Compared with the blank silicone rubber coating,the thermal decomposition temperature was increased by 223℃.(4)PTWs/SR coatings had excellent interfacial bonding stability and good bonding performance to various materials such as specialty rubber,organic coatings,and metals at normal,high,and low temperatures,with good applicability.(5)After aging at 85℃and 85%RH for 1000 hours,the mechanical properties of PTWs/SR coating showed some degradation,and the decrease in elongation was greater,but overall it was controllable.The volume resistivity of PTWs

关 键 词：钛酸钾晶须 硅橡胶 抗静电涂层 制备 

分 类 号：TQ638[化学工程—精细化工] TQ436