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Characterization of silica xerogels surfaces by inverse gas chromatography (IGC) at zero surface coverage and finite concentration

机译：零表面覆盖下逆气相色谱（IGC）对二氧化硅Xerogels表面的表征和有限浓度

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Silylated silica xerogels,with controlled specific surface area and porosity,were prepared by a two step procedure.In the first step hydrogels were treated "in-situ" with HMDS in the presence of 2-propanol and acid.In the second step,the hydrophobic gel was transferred to an organic solvent,residual water removed by azeotropic distillation and the d and isolated.Using this procedure,structure collapse of the hydrogels was minimized and it was possible to control the surface area and porosity of the xerogel by the reaction conditions used to age the hydrogel.

机译：通过两个步骤方法制备具有受控比表面积和孔隙率的甲硅烷基化二氧化硅Xerogels。在2-丙醇和酸存在下，在第一步水凝胶中用HMDS处理“原位”。在第二步中，将疏水性凝胶转移到有机溶剂中，通过共沸蒸馏除去残留的水和D和Demot.pusting该方法，使水凝胶的结构塌陷最小化，并且可以通过反应条件控制Xerogel的表面积和孔隙率用来年龄为水凝胶。

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《Meeting of the Rubber Division》|1999年||共22页
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J.B.Donnet; T.K.Wang; Y.J.Li; H.Balard; G.T.Burns;
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中图分类橡胶工业;
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1. Characterization of silica xerogels surfaces by inverse gas chromatography (IGC) [J] . J. B. Donnet, T. K. Wang, Y. J. Li, Rubber Chemistry and Technology . 2000,第4期

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4. Characterization of silica xerogels surfaces by inverse gas chromatography (IGC) at zero surface coverage and finite concentration [C] . J.B.Donnet, T.K.Wang, Y.J.Li, Meeting of the Rubber Division . 1999

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Characterization of silica xerogels surfaces by inverse gas chromatography (IGC) at zero surface coverage and finite concentration

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