ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Transforming Gas Separations with Scalable Carbon Molecular Sieve Membranes Enabled by Chemically Tuned Hollow-Fiber Precursors.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Blending hydrogen into natural gas pipelines requires efficient separation, while helium recovery from natural gas via cryogenic distillation is energy- and capital-intensive, driving demand for better membranes. This study develops ultraselective carbon molecular sieve (CMS) hollow fiber membranes from chemically modified Matrimid (pyrolyzed at 900°C). Two types of modifications are reported for both applications: treatment with vinyltrimethoxysilane (VTMS) or with diethyltoluenediamine/trimesoyl chloride (DETDA/TMC) and VTMS. The chemical modifications create highly economical new precursor hollow fibers that cannot be formed via conventional solvent dissolution and spinning. This establishes a broadly tunable network-polymer platform for polyimide-based precursor hollow fiber membranes, extendable to various diamines, which represents a transformative materials platform for scalable CMS membranes. Superior gas separation performance has been achieved, which is envisioned to be extendable across many gas pair cases. For 10% H
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