Abstract Excellent hydrophobicity of polycarbosilane (PCS)-derived Si–C–H organic-inorganic hybrid was characterized by measuring water vapor adsorption-desorption isotherms at room temperature. Modification with the PCS-derived Si–C–H successfully improved hydrostability in terms of stable gas permeation property of sol gel-derived hydrophilic mesoporous γ-Al2O3 membrane formed on a macroporous α-Al2O3 support: even under saturated water vapor partial pressure at 50 °C, the modified membrane exhibited high gas permeances of helium, hydrogen and nitrogen ranging from 1.2 to 3.0 × 10−6 mol m−2 s−1·Pa−1. The improved gas permeability under the humid condition achieved for the Si–C–H-modified mesoporous γ-Al2O3 membrane in this study was discussed aiming to prepare a gas permeable hydrophobic mesoporous intermediate layer essential for developing H2-permselective ceramic-based multilayered composite membranes with applications to novel solar hydrogen production system.

中文翻译：

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一种由聚碳硅烷衍生的 Si-C-H 有机-无机杂化物改性的水稳定介孔 γ-Al2O3 膜

摘要 通过测量室温下的水蒸气吸附-解吸等温线，表征了聚碳硅烷 (PCS) 衍生的 Si-C-H 有机-无机杂化物的优异疏水性。用 PCS 衍生的 Si-C-H 改性成功地提高了在大孔 α-Al2O3 载体上形成的溶胶凝胶衍生亲水介孔 γ-Al2O3 膜的稳定气体渗透性能的水稳定性：即使在 50 的饱和水蒸气分压下°C，改性膜表现出高的氦气、氢气和氮气渗透率，范围从 1.2 到 3.0 × 10−6 mol m−2 s−1·Pa−1。