改性SiO2对氟化丙烯酸酯-聚氨酯涂层性能的影响  

The Effect of Modified SiO2 on Properties of Fluorinated Acrylate-polyurethane Coatings

作　　者：张甜甜 尹金雷 宿倩雪 杨璐璐 陈晓婷 ZHANG Tiantian;YIN Jinlei;SU Qianxue;YANG Lulu;CHEN Xiaoting(College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学化工与材料学院

出　　处：《聚氨酯工业》2019年第3期19-22,共4页Polyurethane Industry

摘　　要：首先用三乙氧基-1H,1H,2H,2H-十三氟-N-辛基硅烷(FAS)对SiO2粒子进行疏水改性,再将改性SiO2在氟化丙烯酸酯-聚氨酯乳液(WFPUA)中超声分散并制备涂层。利用FT-IR、TGA和TEM对改性SiO2的结构进行了表征,研究了改性SiO2的用量、干燥温度对涂层接触角、吸水率、附着力、铅笔硬度及热稳定性的影响,并利用EIS电化学分析技术研究了改性SiO2对涂层防腐性能的影响。结果表明,当100份WFPUA乳液中加入8份改性SiO2、干燥温度为80℃时,涂层具有良好的疏水疏油性能,对水和正十六烷的接触角分别为110.2°和40.3°;SEM分析表明改性SiO2在涂层表面形成了粗糙结构;EIS分析表明改性SiO2能改善涂层的防腐性能。SiO2 particles were firstly hydrophobic modified with 1H,1H,2H,2H -perfluorooctyltriethoxysilane(FAS), and then the modified SiO2 was mixed with fluorinated acrylate-polyurethane emulsion by ultrasonic dispersion and coating films were prepared. The structure of modified SiO2 was characterized by FTIR, TGA and TEM. The effects of modified SiO2 dosage and drying temperature on the contact angle, water absorption, adhesion, pencil hardness and thermal stability of the coating films were investigated. EIS electrochemical analysis was used to investigate the effect of modified SiO2 on the anti-corrosion property of coatings. The results showed that, when 8 parts modified SiO2 were added into 100 parts WFPUA emulsions and the drying temperature was 80 ℃, the coating film had good hydrophobic and oleophobic performance, the contact angle of water and n -hexadecane were 110.2° and 40.3° respectively. SEM indicated that the modified SiO2 formed rough structure on the coating surface. EIS showed that adding modified SiO2 could improve the anticorrosion performance of the coating.

关 键 词：氟化丙烯酸酯 水性聚氨酯 涂料 聚氨酯丙烯酸酯 SIO2 疏水 防腐 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]