College of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, People's Republic of China.
J Colloid Interface Sci. 2010 Jun 1;346(1):61-5. doi: 10.1016/j.jcis.2010.02.020. Epub 2010 Feb 24.
Large pore ordered mesoporous organosilicas (OMOs) with distinct mesophase structure was synthesized under low temperatures by the co-condensation of 1,2bis(triethoxysilyl)ethane (BTESE) and tetraethyl orthosilicate (TEOS) in acidic solution, using triblock copolymer F127 as a template and 1,3,5-trimethylbenzene (TMB) as a swelling agent. With the decrease of temperature, a mesophase transformation from 2D hexagonal structure (p6mm) via mesostructured cellular foam to a highly ordered 3D cubic structure (Fm3m) was evidenced by small angle X-ray diffraction (SAXS), transmission electron microscopy (TEM) and N(2) sorption. It reveals that the lower synthesis temperatures may influence the hydrolysis and condensation of silica species and the hydrophilic-hydrophobic property of F127, as well as the swelling capacity of F127 micelles with TMB, which resulting in a formation of large pores ordered mesoporous organosilicas with various mesostructures materials. Finally, the enzyme adsorption properties of the OMOs were investigated and the results showed that the OMOs with a 3D large pore structure and regular morphology is much more qualified for enzyme adsorption.
介孔有序大孔有机硅（OMOs）具有独特的介孔结构，是在低温下通过酸性溶液中 1,2-双（三乙氧基硅基）乙烷（BTESE）和正硅酸乙酯（TEOS）的共缩聚，以三嵌段共聚物 F127 为模板和 1,3,5-三甲苯（TMB）为溶胀剂合成的。随着温度的降低，小角 X 射线衍射（SAXS）、透射电子显微镜（TEM）和 N2 吸附表明，介相从二维六方结构（p6mm）经过介孔泡沫状结构转变为高度有序的三维立方结构（Fm3m）。这表明较低的合成温度可能会影响硅物种的水解和缩合以及 F127 的亲水性-疏水性，以及 F127 与 TMB 形成的溶胀胶束的溶胀能力，从而形成具有各种介孔结构材料的大孔有序介孔有机硅。最后，研究了 OMOs 的酶吸附性能，结果表明，具有 3D 大孔结构和规则形态的 OMOs 更适合酶吸附。
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