Abstract
In this thesis, we applied mixture of PO-EO-PO type reverse triblock copolymer and P123 with the aid of zirconium ion (IV) to study their effect on structure and morphology of mesoporous silica materials, and they applied in transesterification by Ca-MCF and Zr-SBA-15. The elemental and structural characterizations were conducted by powder X-ray diffraction, N2 physisorption, TGA, NMR, SEM and TEM and the results of catalysis of transesterification were measure by GC analysis. The synthesis of SBA-15 synthesis generally stirred 24 hours after adding TEOS, but now we found that stirring time decreased to 30 minutes, the pore topography changed from straight to curved when mixing with PO14EO25PO14, it could be observed by N2 physisorption of two step desorption; the morphology became sphere particle about 3-4μm with p6mm symmetry when adding PO26EO8PO26and Zr4+ which observed by SEM and TEM, it contained two kinds of domains inside, one was p6mm domain with random orientation, the other was worm-like domain located on the sphere surface and the rest spaces of p6mm domains. On the other hand, we studied catalysis of transesterification; for preparing catalyst, we improved the H2SO4 treatment by adding H2SO4 before aging. It could selectively remove surfactant in mesopores by ether cleavage and improved silica condensation at the same time.