表面修饰凹凸棒石及其在环氧丙烯酸树脂中的应用

旨在提高凹凸棒石在环氧丙烯酸酯中的力学性能及分散性能,以凹凸棒石纳米粉体为载体,采用化学沉淀法制备出包硅凹凸棒石复合纳米材料(Si O2/ATP),再用硅烷偶联剂KH570对Si O2/ATP表面进行有机改性,制得KH570-g-Si O2/ATP复合材料。通过TEM、FTIR、XRD及TG对复合材料进行表征。采用共混法制备了紫外光固化复合涂层,考察了KH570-g-Si O2/ATP的添加量对复合涂层耐冲击力、柔韧性的影响。结果表明,当KH570-g-Si O2/ATP的用量占涂料总重量的5%时,与EA涂层相比,复合涂层的耐冲击力的高度由15 cm增加至35 cm;涂膜的柔韧性由15 mm提升至5 mm;此外,与ATP、Si O2/ATP以及KH570-g-ATP相比,KH570-g-Si O2/ATP在EA涂层中具有良好的分散性,EA涂层的力学性能也得到明显改善。

Surface Modification of Nanometer Attapulgite and Its Application on Epoxy Acrylate Resin

Abstract: To improve the mechanics and dispersion performance of attapulgite (ATP) in epoxy acrylate (EA) coating, SiO2/ATP composites were prepared by chemical precipitation and then modified with silane coupling agent KH570 to obtain KH570-g-SiO2/ATP composites. The composites were characterized by TEM, FT-IR, XRD and TG methods. The UV-curable KH570-g-SiO2/ATP /EA composite coating was fabricated by the blend method. The effects of KH570-g-SiO2/ATP content on the impact-resistance, the flexibility of the KH570-g-SiO2/ATP /EA composite coatings were investigated. The results show that the impact-resistance of the KH570-g-SiO2/ATP /EA composite coating increases from 15 cm to 35 cm, the flexibility increases from 15 mm to 5 mm when the KH570-g-SiO2/ATP dosage is 5%. In addition, KH570-g-SiO2/ATP has a better dispersibility in the EA composite coating than ATP, SiO2/ATP and KH570-g- ATP.