表面修饰凹凸棒石及其在环氧丙烯酸树脂中的应用

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

摘要:

摘要：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(SiO2/ATP)，再用硅烷偶联剂KH570对SiO2/ATP表面进行有机改性，制得KH570-g-SiO2/ATP复合材料。通过TEM、FT-IR、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，研究了KH570-g-SiO2/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-SiO2/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 15cm 增加至 35cm；涂膜的柔韧性由 15 mm 提升至5 mm；此外，与ATP、SiO2/ATP以及KH570-g-ATP相比，KH570-g-SiO2/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。

Abstract:

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.