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磷化聚苯胺固化含环氧基硅树脂涂层的制备及性能
李玉峰1, 张若男2, 李继玉2, 李怀阳2, 王万兵2, 李硕2
1.齐齐哈尔大学 材料科学与工程学院, 齐齐哈尔 161006;2.齐齐哈尔大学 化学与化学工程学院, 齐齐哈尔 161006
摘要:
为了改善有机硅树脂的固化条件及其涂层的防腐蚀性能,以γ-缩水甘油醚氧丙基三甲氧基硅烷(GPTMS)、硅酸乙酯(TEOS)、二甲基二乙氧基硅烷(DMDMS)为硅烷单体,采用溶胶-凝胶法制备了含环氧基的硅树脂(ESiR),并以磷化聚苯胺(PANI)为固化剂制备了硅树脂防腐蚀涂层,分析了PANI固化含环氧基硅树脂的固化反应。通过测试固化时间、涂层的柔韧性和硬度、热失重曲线等考察了PANI添加量对涂层固化程度的影响;通过附着力、接触角、吸水率、电化学阻抗谱和极化曲线测试了PANI添加量对涂层性能的影响。结果表明:当PANI添加量(质量分数)为3 %时,得到的涂层固化效果较好,涂层既具有良好的柔韧性,又有较高的硬度;且涂层表现出较好的疏水性、附着力和优异的防腐蚀性能,其接触角为103.5°,吸水率为8.91%;涂层的干、湿附着力均为0级;腐蚀电流密度为7.58×10-8 A/cm2,电化学阻抗值达到3.4×106 Ω·cm2
关键词:  环氧基  硅树脂  聚苯胺  固化  防腐蚀
DOI:10.11933/j.issn.1007-9289.20180830001
分类号:TG174.46
基金项目:教育部科学技术研究重点项目(211051);黑龙江省省属高等学校基本科研业务费科研项目(135209206)
Preparation of Epoxide Group Containing Silicone Resin Coating Cured with Phosphated Polyaniline and Its Properties
LI Yufeng1, ZHANG Ruonan2, LI Jiyu2, LI Huaiyang2, WANG Wanbing2, LI Shuo2
1.College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China;2.College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
Abstract:
To improve the curing condition of the silicone resin and the corrosion resistance of the coatings, silicone resin containing epoxide group (ESiR) was synthesized by sol-gel method with γ-glycidoxypropyl trime thoxy silane (GPTMS), tetraethoxy silicate (TEOS), and dimethyl diethoxy silane (DMDMS) as silane monomer. The silicone resin anticorrosion coatings were then prepared by using phosphated polyaniline (PANI) as curing agent. The curing reaction of PANI cured silicone resin containing epoxide group was analyzed. The effect of PANI amount on curing degree of the coatings was investigated by the curing time, flexibility, hardness and thermo gravimetric curve. The effects of PANI amount on the coatings properties were investigated by adhesion, contact angle, water absorption, electrochemical impedance spectroscopy (EIS) and potential polarization curve. Results show that the coating has better curing degree, hydrophobicity property, adhesion, and excellent anticorrosion properties when the amount of PANI is 3%. The coating has both good flexibility and high hardness. The water contact angle of the coating is 103.5° and the water absorption rate is 8.91%. The dry adhesion and wet adhesion are grade 0, respectively. The corrosion current density is 7.58×10-8 A/cm2, and the electrochemical impedance value reaches 3.4×106 Ω·cm2.
Key words:  epoxide group  silicone resin  polyaniline  curing  anticorrosion