溶胶-凝胶法制备含氟聚丙烯酸酯/SiO_2杂化材料(英文)

Study On Fluoro-Acrylate Polymer/SiO_2 Hybrids Prepared by Sol-Gel Process

用酸催化溶胶-凝胶法制得SiO2溶胶,与丙烯酸酯单体原位聚合,制备了含氟聚丙烯酸酯/SiO2杂化材料。通过红外光谱、场发射扫描电镜、X射线光电子能谱对杂化材料的结构、形态及表面化学组成进行了表征,表明SiO2在杂化体系中以Si-O网络的形式存在,并且与有机相之间有良好键合。并研究了SiO2相的形态、分布和界面状况对杂化材料的表面性能、热学性能和力学性能的影响。测试结果证实,随着SiO2含量的增加,杂化材料的疏水性、热稳定性和硬度都逐渐增强,附着力则是先增大后减小。

Silica sols were synthesized by an acid-catalyzed sol-gel process, and fluoro-acrylate polymer/SiO2 hybrid materials were prepared by silica sols in-situ polymerized with acrylate monomers. The structure, morphologies and surface chemical composition of the hybrid system was characterized by FT-IR, FESEM and XPS. It was found that in the hybrid system, SiO2 subsisted in networks, and covalent linked with organic components. The effects of morphology, distribution and interfacial conditions of inorganic disperse phase on the surface, thermal and mechanical properties of hybrids were investigated. The result showed that with the increase of SiO2 content, the water contact angle, thermal stability and hardness of the hybrids were enhanced, but the adhesion of the hybrid coatings increased firstly and then decreased.