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- W2000385391 abstract "Mesoporous silica/polymer sulfonate composite materials were prepared by simply mixing hexadecyltrimethylammonium bromide, polymer sulfonates and TEOS (tetraethoxysilane) in alkaline aqueous solution. Nafion and poly(sodium 4-styrenesulfonate) were employed as polymer sulfonates. XRD patterns and nitrogen adsorption–desorption isotherms showed that the precipitates obtained had mesostructure similar to MCM-41. Especially, the crystallinity of hexagonal structure of composite materials synthesized with Nafion was high. From all the results obtained here, it is concluded that the polymer sulfonate resins might be incorporated in the wall framework of mesoporous silica matrix. However, when the excess amount of Nafion was mixed, the acid sites of Nafion were significantly lost in the obtained materials. These composite materials present new classes of organically modified mesoporous silicas, where organic polymers are incorporated in the framework of mesoporous silica. They were used as catalysts for α-methylstyrene dimerization and Friedel–Crafts alkylation reaction of aromatics." @default.
- W2000385391 created "2016-06-24" @default.
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- W2000385391 date "2007-03-01" @default.
- W2000385391 modified "2023-09-27" @default.
- W2000385391 title "Preparation of mesoporous silica/polymer sulfonate composite materials" @default.
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- W2000385391 doi "https://doi.org/10.1016/j.molcata.2006.09.016" @default.
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