季铵盐改性导电TiO_(2)晶须在环氧涂料中的性能研究  

Research on performance of quaternary ammonium salt modified conductive TiO_(2)whiskers in epoxy coatings

作　　者：葛平瑞 左士祥[1,2] 唐骏 李霞章 刘文杰[1] 姚超[1,3] GE Ping-rui;ZUO Shi-xiang;TANG Jun;LI Xia-zhang;LIU Wen-jie;YAO Chao(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China;Xuyi R&D Center of Attapulgite Applied Technology,Changzhou University,Xuyi 211700,China;Zhejiang Coloray Technology Development Co.,Ltd.,Huzhou 313200,China)

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]常州大学盱眙凹土研发中心,江苏盱眙211700 [3]浙江凯色丽科技发展有限公司,浙江湖州313200

出　　处：《现代化工》2022年第11期179-183,188,共6页Modern Chemical Industry

基　　金：浙江省重点研发计划(2019C01083);淮安市自然科学研究计划(HAB201952)。

摘　　要：采用十八烷基二甲基羟乙基季铵硝酸盐(HDC)对导电TiO_(2)晶须(AT)进行有机表面改性,制得改性导电TiO_(2)晶须(MAT)。利用水接触角测试、热分析、傅里叶红外光谱和透射电子显微镜等对MAT进行表征。结果表明,当m(HDC)∶m(AT)=0.05时,改性效果较佳且HDC以物理吸附方式存在AT表面,有机包覆层厚度约为4 nm。将改性前后的导电粉体添加到环氧树脂涂料中,研究导电涂料的流变性能及其涂层的导电性能和力学性能。结果表明,与AT相比,MAT在导电涂料中具有更好的分散性和抗流挂性能,且涂层的导电性能和力学性能更加优异。当MAT质量分数为9%时,导电填料之间相互连接形成三维导电网络,涂层表面电阻可达1.90×10^(6)Ω/sq。此外,MAT环氧导电涂料触变性小且储能模量大,具有较高的稳定性。Octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate(HDC)is used for organic surface modification of conductive TiO_(2) whiskers(AT)to prepare cationic modified conductive TiO_(2) whiskers(MAT)that is characterized by water contact angle measurement,thermal analysis,Fourier infrared spectroscopy and transmission electron microscopy.The results show that as m(HDC)∶m(AT)=0.05,the modification effect is better HDC is physically adsorbed on the surface of AT,and the thickness of organic coating layer is about 4 nm.The conductive powders before and after the modification are respectively added into epoxy resin coatings to study the rheological properties of conductive coatings,and the conductivity and mechanical properties of the coating.It is shown that compared with AT,MAT has better dispersibility and anti-sagging performance in conductive coatings,and the conductive and mechanical properties of the coating are more excellent.When the amount of MAT added is 9%,the conductive fillers connect to each other to form a three-dimensional conductive network,and the surface resistance of the coating can reach 1.90×10^(6)Ω/sq.In addition,MAT epoxy conductive coatings have low thixotropy,large storage modulus,and high stability.

关 键 词：TiO_(2)晶须 有机表面改性 物理吸附 流变性能 

分 类 号：TQ134.1[化学工程—无机化工]