胶体晶体模板法制备有序多孔堇青石材料研究

Study on preparation of ordered porous cordierite with colloidal crystals template

采用乳液聚合法制备了单分散P(St-AA)微球,经自然沉降法制成胶体晶体模板,再利用胶晶模板法制备了有序多孔堇青石。利用FTIR、SEM、DSC、XRD等方法对P(St-AA)微球单分散性及有序多孔堇青石结构进行了研究。结果表明,当AA用量占单体总量的5.0%时,制备的P(St-AA)微球的单分散性及其胶体晶体微球结构最佳。经烧结去除P(St-AA)微球得到的有序多孔堇青石材料的孔径较单分散P(St-AA)微球稍小,约为200nm左右。当烧结温度为1200℃,多孔材料为α-堇青石相。

Monodispersed P（St-AA） latex particles were prepared by emulsion polymerization, and the colloidal crystal template consisting of monodisperse P（St-AA） latex particles were prepared by natural sedimentation. Then the P （St-AA） latex particles and the ordered porous cordierite were analysed by FTIR, SEM, DSC and XRD. The results showed that the monodispersity of latex particles and surface quality of colloidal crystal particles were better at 5% of AA based on total monomers. The ordered porous cordierite had with diameter of about 200nm were fabricated when the P（St- AA） spheres were removed by calcination. Its diameter was less than that of the monodisperse P（St-AA） latex particles. The main crystalline phase of trcordierite was formed at the calcination temperature about 1200℃.