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中文摘要：
在酸性合成体系中，利用非离子型聚乙烯醚-聚丙烯醚二嵌段共聚物（PEO-PPO）作为模板剂，制备了介孔SiO2材料。采用X射线衍射、N2吸附、扫描电镜、透射电镜等手段表征合成材料的孔结构和孔性能。由共聚物的PEO和PPO链长度比来控制合成的SiO2的孔径大小，可以从微孔到介孔尺寸范围调变，但孔结构均由蠕虫状孔道组成；同时考察了合成条件的影响。结果表明，合成产物的孔大小随着合成体系中阳离子表面活性剂CTAB添加量的增加而增大。
英文摘要：
Nonionic poly （ethylene oxide）-b-poly （propylene oxide） diblock copolymers （EOm-POn） were used as template for the synthesis of mesoporous silica materials with different pore sizes under acid condition, and the pore structure and textural properties were characterized by X-ray diffraction, nitrogen adsorption, scanning and transmission electron microscopes. The pore size of the synthesized silica could be tuned from microporous to mesoporous size range by increasing the PPO chain length, and changing the ratio of the chain lengths of PEO to PPO of the dihlock copolymers. However, the mesoporous structures of the resultant samples were all of wormhole- like pores. The influences of various synthetic factors to the pore sizes of the samples were investigated. It is found that pore sizes of the samples could also be increased with the increase of CTAB content in the EO30 PO34-CTAB mixed surfactants.
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