Tubular carbon molecular sieve (CMS) membranes have been recognized as a potential module for commercial application due to its high mechanical strength and large surface area. However, the carbon layer uniformity was restricted by substrate texture and dope fluidity when the dip‐coating method was used. This study evaluated the influence of various parameters of dip‐coating with an integrated vacuum‐assisted system, including solvent vaporization rates, vertical immersion/withdrawal velocity, vacuum degree, dope composition, coating cycles on the microstructure, and gas separation performance of CMS membranes. Using vacuum assistance and a low‐vaporization solvent minimized the influence of viscosity and gravity on dope fluidity as a result of fast phase inversion. The as‐prepared tubular CMS membranes showed enhanced perm‐selectivity according to a H₂/N₂ gas selectivity of 8.8, a CO₂/N₂ gas selectivity of 6.7, a H₂ permeability of 464 barrer, and a CO₂ permeability of 356 barrer.

中文翻译：

---

轻质气体分离用管状碳膜的均匀性控制和超微孔发展

管状碳分子筛（CMS）膜因其高机械强度和大表面积而被公认为是商业应用的潜在组件。但是，当采用浸涂法时，碳层的均匀性受到基材质地和涂料流动性的限制。这项研究评估了使用集成真空辅助系统进行浸涂的各种参数的影响，包括溶剂蒸发速率，垂直浸入/抽出速度，真空度，涂料组成，涂布周期对CMS膜的微观结构和气体分离性能的影响。 。快速相转化的结果是，使用真空辅助剂和低蒸发溶剂可将粘度和重力对涂料流动性的影响降至最低。₂ / N ₂气体选择性为8.8，CO ₂ / N ₂气体选择性为6.7，H ₂渗透性为464 barrer，CO ₂渗透性为356 barrer。