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Formation and Analysis of a Polyimide Layer in Composite Membranes

机译:复合膜中聚酰亚胺层的形成与分析

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Composite membranes containing a thin-film layer of aromatic polyimides (PI) ensure an advantageous combination of selectivity and permeability in gas separation. A series of rigid-chain PI with different chemical structures were studied as a thin active layer. Composite membranes were prepared by coating a solution of poly(amic acid)(PAA) and an imidization catalyst on a poly(phenylene oxide)(PPO) support with pores filled by decane. The subsequent stage of solid-state catalytic transformation of the PAA/PPO membrane into the PI/PPO membrane determines the specific structure of the PI layer and the transport properties of the PI/PPO composite membranes. The structure of composite membranes was determined by scanning electron microscopy and analyzed in the terms of the resistance model of gas transport in composite membranes.
机译:包含芳香族聚酰亚胺(PI)薄膜层的复合膜可确保气体分离中选择性和渗透性的有利结合。研究了一系列具有不同化学结构的刚性链PI作为薄活性层。通过在具有癸烷填充孔的聚苯醚(PPO)载体上涂覆聚(酰胺酸)(PAA)和酰亚胺化催化剂的溶液来制备复合膜。 PAA / PPO膜进入PI / PPO膜的固态催化转化的后续阶段决定了PI层的具体结构以及PI / PPO复合膜的传输性能。通过扫描电子显微镜确定复合膜的结构,并根据复合膜中气体传输的阻力模型进行分析。

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