摘要
为了解决纳米SiO_(2)、六方氮化硼(BN)固体填料在树脂中的分散效果,利用硅烷偶联剂(KH-560)对二者进行表面处理。在共混体系中加入偶联剂作相容剂,增加与聚二甲基硅氧烷(PDMS)及环氧树脂的相容性,利用超声方式使复合体系充分分散,以发挥填料的性能,得到了具有疏水效果的防腐蚀环氧复合涂层。利用正交试验对其配方组成、涂层样品的各方面性能深入研究,并对其结构、接触角、附着力、电化学、耐介质腐蚀等方面进行测试和分析。研究结果表明:(1)硅烷偶联剂KH-560成功接枝于纳米SiO_(2)和六方BN上,在树脂中的相容性好。(2)根据对样品涂层各测试指标的结果分析,得到各填料添加量对各性能指标的影响程度及最佳水平级别。(3)填料的引入使涂层接触角有明显增加,接触角即涂层疏水性随3种填料添加量呈现正相关趋势。极差分析表明,3种填料的最佳水平均为第4水平,改性六方BN添加量水平对涂层疏水性影响最明显。(4)根据耐酸碱盐介质测试结果可知:涂层样品对于碱性和浓盐介质的防护能力优于对酸介质,在碱性及浓盐介质中基本不发生发泡、损坏、腐蚀现象。(5)正交试验中最佳配方为:PMDS添加量为0.5 g,改性纳米SiO_(2)添加量为2.0 g,改性六方BN添加量为1.00 g。
In order to solve the dispersion effect of nano SiO_(2) and hexagonal boron nitride(BN) solid fillers in resin,surface treatment was carried out on both by using silane coupling agent(KH-560).By adding coupling agent as compatibilizer in the blend system,the compatibility with polydimethylsiloxane(PDMS) and epoxy resin was increased.The composite system was fully dispersed by using ultrasound to enhance the properties of the filler,resulting in the anticorrosion epoxy composite coating with hydrophobic effect.The in-depth research on its formula composition and various properties of coating samples was conducted by using orthogonal experiment,and its structure,contact angle,adhesion,electrochemistry,and resistance to medium corrosion were tested and analyzed.The research results showed that,(1) Silane coupling agent KH-560 was successfully grafted onto nano SiO_(2) and hexagonal BN,with good compatibility in the resin.(2) Based on the analysis of the test indicators of the sample coating,the influence degree and optimal level of each filler addition on various performance indicators were determined.(3) The introduction of fillers significantly increased the contact angle of the coating,and the contact angle,i.e.the hydrophobicity of the coating,showed a positive correlation trend with the addition amount of three fillers.Range analysis showed that the optimal level for all three fillers was the fourth level,and the level of modified hexagonal BN addition had the most significant effect on the hydrophobicity of the coating.(4) According to the test results of acid,alkali and salt media resistance,it could be seen that the coating sample had better protection ability against alkaline and concentrated salt media than against acidic media,and there was basically no foaming,damage or corrosion phenomenon in alkaline and concentrated salt media.(5) The optimal formula in the orthogonal experiment was:PMDS addition of 0.5 g,modified nano SiO_(2) addition of 2.0 g,and modified hexagonal BN addition of 1.00 g.
作者
张滨莹
叶一鸣
文振兴
陈佳雨
祁滔
何晓红
马艾丽
Zhang Binying;Ye Yiming;Wen Zhenxing;Chen Jiayu;Qi Tao;He Xiaohong;Ma Aili(Beijing Institute of Technology,Zhuhai 519088,Guangdong,China)
出处
《中国胶粘剂》
CAS
2024年第8期60-67,共8页
China Adhesives
基金
北京理工大学珠海学院大学生创新计划项目。
关键词
防腐涂料
疏水性
配方
表面改性
复合材料
anticorrosive coating
hydrophobicity
formulation
surface modification
composite material
