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Effect of surface acidity and pore size of Al-substituted plugs-containing SBA-15 and MCM-41 silicas on the polymerization of THF 被引量:3

Effect of surface acidity and pore size of Al-substituted plugs-containing SBA-15 and MCM-41 silicas on the polymerization of THF
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摘要 We reported here the simultaneous influence of surface acidity and pore size of M-substituted hexagonal mesoporous silicas (Al- doped plugs-containing SBA-15 and M-doped MCM-41) on polymerization of THE These materials were directly synthesized by introduced aluminum isopropoxide into reaction mixture including surfactant and siliceous precursor. Al-doped plugs-containing SBA-15 (denotes as PAS) samples not only possess typical two-step desorption isotherms, which implied PAS materials generated plugs in their mesochannel, but also exhibit larger pore size and thicker wall than that of Al-doped MCM-41 (denotes as ACM), which implied PAS would have a great advantage on catalytic reaction involving large molecular (e.g. polymer of THF) in industrial point'of view. To investigate catalytic activity of PAS and ACM with moderate acidic sites the polymerization of THF in the presence of acetic anhydride was carried out. The results showed PAS exhibiting good performance on polymerization of THF. Such result could be related to the large pore size and moderate acidic sites. We reported here the simultaneous influence of surface acidity and pore size of M-substituted hexagonal mesoporous silicas (Al- doped plugs-containing SBA-15 and M-doped MCM-41) on polymerization of THE These materials were directly synthesized by introduced aluminum isopropoxide into reaction mixture including surfactant and siliceous precursor. Al-doped plugs-containing SBA-15 (denotes as PAS) samples not only possess typical two-step desorption isotherms, which implied PAS materials generated plugs in their mesochannel, but also exhibit larger pore size and thicker wall than that of Al-doped MCM-41 (denotes as ACM), which implied PAS would have a great advantage on catalytic reaction involving large molecular (e.g. polymer of THF) in industrial point'of view. To investigate catalytic activity of PAS and ACM with moderate acidic sites the polymerization of THF in the presence of acetic anhydride was carried out. The results showed PAS exhibiting good performance on polymerization of THF. Such result could be related to the large pore size and moderate acidic sites.
出处 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第1期105-108,共4页 中国化学快报(英文版)
基金 supported by Science Foundation of China(No.20573071) Key Scientific and Technological Projects of Shanxi Province(No.20090321059)
关键词 Hexagonal mesostructure POLYMERIZATION THF ACIDITY Pore size Hexagonal mesostructure Polymerization THF Acidity Pore size
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