柠檬酸催化含环氧基硅树脂的制备及性能研究  

Preparation of epoxy-containing silicone resin with citric acid as catalyst and study on its properties

作　　者：李玉峰[1,2] 张若男 高晓辉 张宏波[1] 姜海燕[1] LI Yufeng;ZHANG Ruonan;GAO Xiaohui;ZHANG Hongbo;JIANG Haiyan(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006 [2]齐齐哈尔大学轻工与纺织学院,黑龙江齐齐哈尔161006

出　　处：《电镀与涂饰》2020年第20期1413-1419,共7页Electroplating & Finishing

基　　金：黑龙江省省属高等学校基本科研业务费科研项目(135209206)。

摘　　要：以γ−缩水甘油醚氧丙基三甲氧基硅烷(GPTMS)、正硅酸乙酯(TEOS)和二乙氧基二甲基硅烷(DEDMS)为单体,柠檬酸为催化剂,三甲基甲氧基硅烷(TMMS)为封端剂,采用溶胶−凝胶法制备了含环氧基的硅树脂(ESiR)。然后以γ−氨丙基三乙氧基硅烷(KH-550)作为固化剂制得涂层。采用傅里叶交换红外光谱仪表征了ESiR的结构。讨论了制备工艺对涂层耐蚀性的影响,得到的最佳条件为:n(R)/n(Si)=0.90(其中R代表与Si直接相连的烷基),反应温度50°C,pH 4.0。所得涂层的水接触角为96.53°,干附着力为0级,湿附着力为1级,具有最小的腐蚀电流密度,最大的电化学阻抗。An epoxy-containing silicone resin(ESiR)was synthesized by sol–gel method withγ-glycidoxypropyltrimethoxysilane(GPTMS),tetraethyl orthosilicate(TEOS),and diethoxydimethylsilane(DEDMS)as monomers,citric acid as catalyst,and trimethylmethoxysilane(TMMS)as end-capping reagent,and then mixed with 3-aminopropyltriethoxysilane(KH-550)as curing agent to form coatings.The structure of the ESiR was characterized by Fouriertransform infrared spectrometry.The effects of different preparation conditions on corrosion resistance of coatings were studied.The optimal conditions were obtained as follows:n(R)/n(Si)=0.90(R represents the alkyl directly attached to Si),reaction temperature 50°C,and pH 4.0.The coating obtained thereunder had a water contact angle of 96.53°,a dry adhesion of 0 grade,a wet adhesion of 1 grade,the smallest corrosion current density,and the largest electrochemical impedance.

关 键 词：环氧基 硅树脂 硅烷 固化 防腐蚀 电化学 

分 类 号：TQ630.7[化学工程—精细化工]