Synthesis and Characterization of Polyimide Mixed Matrix Membranes
Synthesis and Characterization of Polyimide Mixed Matrix Membranes
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DOI：
10.1080/01496395.2011.589422
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发表时间：
2011-01-01
影响因子：
2.8
通讯作者：
Mohammadi, Toraj
中科院分区：
文献类型：
--
作者：
Bakhtiari, Omid;Mosleh, Samira;Mohammadi, Toraj
以基质5218和P84的聚酰亚胺为主链，添加白炭黑、4A沸石、碳纳米管和碳分子筛等不同的填料，合成了平板混合基膜。考察了不同聚合物种类和浓度、不同填料种类和含量以及制备工艺对复合材料性能的影响。扫描电子显微镜(SEM)分析表明，两相之间存在良好的连接，与聚合物膜相比，MMM具有更高的性能。热处理作为一种缺陷修复技术被发现是非常有效的。渗透汽化和气体渗透实验表明，与纯聚合物膜相比，MMMS具有更好的分离性能。结果表明，对于用于渗透汽化和气体分离实验的整齐聚合物膜，MMMS的分离因子分别增加了7倍和2倍，而渗透速率几乎保持不变，表明在聚合物基质中加入适当的填料是有效的。
Polyimides of Matrimid 5218 and P84 as backbone and different fillers including silica aerosil, zeolite 4A, carbon nanotubes, and carbon molecular sieves were used to synthesize flat mixed matrix membranes (MMMs). Effects of different polymer types and concentrations, different filler types and contents, and fabrication procedure were investigated. Scanning Electron Microscopy (SEM) analysis showed acceptable connections between the two phases and the MMMs performed higher performance compared to the polymeric membranes. Thermal treatment of the MMMs, as a defect repairing technique, was found very effective. Performed pervaporation and gas permeation experiments showed better separation performances of the MMMs with respect to those of the neat polymeric membranes. The results showed up to seven and two times increment in separation factors of MMMs regarding to neat polymeric membranes for pervaporation and gas separation experiments, respectively, while permeation rates nearly remained constant indicating effectiveness of the proper filler incorporation within polymer matrices approach.