摘要
为了提高凹凸棒石(ATP)在环氧丙烯酸酯(EA)涂层中的分散性能,用4,4-二苯基甲烷二异氰酸酯(MDI)对ATP表面进行有机改性,制备了MDI接枝ATP(MDI-g-ATP)复合材料。对MDI-g-ATP复合材料的红外光谱和热分析结果证实,MDI接枝到了凹凸棒石表面。然后采用共混法制备了紫外光固化纳米MDI-g-ATP/EA复合涂层。研究了MDI-g-ATP的添加量对MDI-g-ATP/EA)涂层耐冲击力、柔韧性以及凝胶率的影响。结果表明:当MDI-g-ATP的用量为5%时,与EA涂层相比,MDI-g-ATP/EA涂层的耐冲击力的最大高度由20·cm增加至35·cm;涂膜的柔韧性由15 mm减小至5 mm;此外,与未改性的ATP相比,MDI-g-ATP在EA涂层中具有良好的分散性。
To improve the dispersive performance of attapulgite （ATP） in epoxy acrylate （EA） coating, 4,4-diphenylmethane diisocy-anate （MDI） was used to modify the ATP and prepared MDI-g-ATP composite. The MDI-g-ATP composite was characterized by Fou-rier transformed infrared microscopy and thermogravimetry as well. It was indicated that MDI could be grafted on the surface of ATP. A UV-curable nano MDI-g-ATP/EA composite coating was prepared by the blend method. The effect of MDI-g-ATP content on the impact-resistance, flexibility and the gel rate of the MDI-g-ATP/EA composite coating was investigated. The results show that com-pared to the pure EA coating, the maximum height of the impact-resistance of the MDI-g-ATP/EA composite coating increases from 20 cm to 35 cm, and the flexibility decreases from 15 mm to 5 mm when the MDI-g-ATP dosage is 5%of the whole coating. In addi-tion, MDI-g-ATP has a better dispersibility in the EA composite coating rather than unmodified ATP.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2013年第9期1232-1237,共6页
Journal of The Chinese Ceramic Society
基金
江苏省高校科技创新团队(2011–24)
江苏省科技支撑计划(BE2011125
BE2011663
BE2012050)
常州市科技支撑计划(CE20110017)资助项目
江苏省环境材料与环境工程重点实验室开放课题(K11032)
