云母氧化铁的表面改性及其在水性醇酸防腐涂料中的应用  

Surface modification of mica iron oxide and its application in water-based alkyd anticorrosive coatings

作　　者：戴恺晨 刘鹏程 裴克梅[1] DAI Kaichen;LIU Pengcheng;PEI Kemei(School of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学理学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2020年第3期428-434,共7页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(21673208)。

摘　　要：采用硬脂酸、硅烷偶联剂(KH550、KH570和KH792)分别对云母氧化铁进行表面改性,研究不同种类改性剂对云母氧化铁改性效果的影响,确定改性剂的最佳用量,利用FT-IR和偏光显微镜对改性效果最好的云母氧化铁的结构和形貌进行分析和表征;将改性效果最好的云母氧化铁添加到自制的水性醇酸树脂中,制备出水性醇酸云母氧化铁防腐涂料,探究不同云母氧化铁添加量对涂层常规性能的影响,并结合电化学测试及常规耐腐蚀测试方法,对水性醇酸云母氧化铁防腐涂料的防腐性能进行研究。结果表明:硅烷偶联剂KH792的改性效果最好,最佳用量为1.2%;当KH792改性云母氧化铁的用量为15.0%时,可制备得到性能优良的防腐涂料,此时涂层表干时间为20 min,实干时间为25 h,铅笔硬度达3H,附着力0级,耐冲击性41 cm,耐水性和耐盐水性10 d无异常,耐中性盐雾168 h无明显变化。Stearic acid and silane coupling agents(KH550, KH570 and KH792) were used to modify the surface properties of mica iron oxide, and the effects of different types of modifiers on the modification effect of mica iron oxide were studied. Besides, the optimal dose of the modifier was determined. The structure and morphology of the best modified mica iron oxide were analyzed and characterized by FT-IR and polarizing microscope. The best modified mica iron oxide was added to the homemade water-based alkyd resin to prepare water-based alkyd mica iron oxide anticorrosive coatings. The effects of different doses of mica iron oxide on conventional performance of coatings were explored, and the anticorrosive properties of water-based alkyd mica iron oxide anticorrosive coatings were studied in combination with electrochemical test and conventional corrosion resistance test methods. The results showed that the silane coupling agent KH792 had the best modification effect, and the optimal dosage was 1.2%. When the dose of KH792 modified mica iron oxide was 15.0%, an anticorrosive coating with excellent performance could be prepared. At this time, the surface drying time of the coating was 20 minutes, the actual drying time was 25 hours, the pencil hardness was 3 H, the adhesion level was 0, the impact resistance was 41 cm, the water resistance and salt water resistance had no abnormalities for 10 days, the neutral salt spray resistance had no significant change for 168 hours.

关 键 词：云母氧化铁 改性 水性醇酸树脂 防腐涂料 电化学 

分 类 号：TS195.644[轻工技术与工程—纺织化学与染整工程]