用响应性聚合物复合胶束为模板制备大介孔空心硅球-中国材料进展

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Title:: Responsive Block Copolymer Induced Large Pore Mesoporous Hollow Silica Nanospheres

Author(s):: HE Huan; XU Yanling; MA Rujiang; SHI Linqi; (Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry,Nankai University, Tianjin, 300071, PR China)

摘要:: 利用响应性聚合物聚（乙二醇-b-N-异丙基丙烯酰胺）（PEG114-b-PNIPAm130）和聚（N异丙基丙烯酰胺b4乙烯基吡啶）（PNIPAm106bP4VP102）在水溶液中自组装形成核-壳型复合胶束，并以其为单一软模版，以四甲氧基硅烷（TMOS）为前躯体，温和条件下，一步法制备得到了形态、尺寸可控的介孔空心硅球。这种介孔空心硅球具有大的比表面积（1 01811 m2/g）和介孔尺寸（121 nm）。研究了交联剂、灼烧及不同pH值对所得空心硅球形态、尺寸等的影响。最后以牛血清蛋白为模型蛋白，研究了介孔硅球对大分子的吸附能力。

Abstract:: Controllable largepore mesoporous hollow silica nanospheres (LMHSN) with large surface area (1 01811 m2/g) 〖JP+1〗and mesoporous width (121 nm) was synthesized through a general method. Firstly, responsive block copolymers poly (ethylene glycolbNisopropyl acrylamide) (PEG114bPNIPAm130) and poly (Nisopropyl acrylamideb4vinyl pyridine) (PNIPAm106bP4VP102) selfassembled into coreshell complex micelles, followed by silicification of the shell with the addition of the silica precursor tetramethoxysilane (TMOS) under mild condition. Then, the effects of addition of crosslinker and different pH values on the structure and morphology of LMHSN were discussed. Finally, we studied the ability of the adsorption of macromeolecular by the LMHSN.