Matching Analysis of Mixed Matrix Membranes for Organic Solvent Reverse Osmosis
Matching Analysis of Mixed Matrix Membranes for Organic Solvent Reverse Osmosis
复制标题
有机溶剂反渗透混合基质膜的匹配分析
DOI：
10.1021/acs.iecr.1c04922
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发表时间：
2022
影响因子：
4.2
通讯作者：
Lively, Ryan P.
中科院分区：
文献类型：
--
作者：
Roos, Conrad J.;Weber, Dylan J.;Jang, Hye Youn;Lively, Ryan P.
现有的聚合物膜难以分离液相中的小分子溶剂，这是由于对溶剂诱导的塑化和膨胀的选择性低。混合基质膜（MMM）可以通过刚性框架材料内的基于扩散的分离来潜在地缓解这个问题。来自我们实验室和其他人的先前工作已经表明，有机溶剂反渗透膜对跨膜压力具有不同的响应，这取决于材料是否是刚性结构（例如，碳、沸石或金属有机骨架）或溶胀聚合物。这项工作结合了两个麦克斯韦-斯特凡传输模型，代表灵活的聚合物相和刚性微孔填料，与麦克斯韦模型预测混合基质膜溶剂分离性能作为压力和膜材料性能的函数。该模型表明，对于每一个填料的渗透选择性，有一个填料的渗透性，提供了最大的分离因子，在最终的MMM。这种最佳渗透性随着填料的渗透选择性而增加。建立了双层UiO-66/Matrimid中空纤维MMM，以评估模型对跨膜压力对甲苯和均三甲苯分离的影响的预测作为测试案例。Ui 0 -66/Matrimid膜显示出随着压力增加渗透性的预测下降。分离因子随着较高压力增加分离驱动力而增加，与模型一致。UiO-66被证明在甲苯/均三甲苯中对Matrimid具有上级选择性;然而，我们得出结论，最终需要超选择性材料来实现用于最具挑战性的溶剂-溶剂分离的混合基质膜概念，并且关于用于有机溶剂反渗透的聚合物-填料配对仍然存在开放性问题。
Existing polymeric membranes struggle to separate small molecule solvents in the liquid phase due to low selectivity from solvent-induced plasticization and dilation. Mixed matrix membranes (MMMs) can potentially alleviate this issue via diffusion-based separations within rigid framework materials. Previous work from our lab and others has shown that organic solvent reverse osmosis membranes have different responses to transmembrane pressure depending on whether the material is a rigid structure (e.g., a carbon, zeolite, or metal-organic framework) or a swollen polymer. This work combines two Maxwell–Stefan transport models, representing the flexible polymer phase and a rigid microporous filler, with the Maxwell model to predict mixed matrix membrane solvent separation performance as a function of pressure and membrane material properties. The model demonstrates that for every filler perm-selectivity, there is a filler permeability that provides the largest separation factor in the final MMM. This optimum permeability increases with the filler’s perm-selectivity. Dual-layer UiO-66/Matrimid hollow fiber MMMs were created to evaluate the model’s prediction on the influence of transmembrane pressure on the separation of toluene and mesitylene as a test case. The UiO-66/Matrimid membrane demonstrated a predicted decline in permeance as pressure was increased. The separation factors increased as higher pressures increased the driving force for separation, consistent with the model. UiO-66 was shown to have superior selectivity to Matrimid in toluene/mesitylene; however, we conclude that ultraselective materials are ultimately needed to enable the mixed matrix membrane concept for the most challenging solvent–solvent separations, and open questions remain about polymer–filler pairings for organic solvent reverse osmosis.
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跨渗透蒸发膜的稳态和瞬态传质的详细建模
影响因子：
3.7
作者：
J. Bausa;W. Marquardt
通讯作者：
W. Marquardt
影响因子：
4.6
作者：
Ribeiro, Claudio P., Jr.;Freeman, Benny D.;Paul, Donald R.
通讯作者：
Paul, Donald R.
DOI：
10.1016/b978-0-12-823907-0.00024-8
发表时间：
2021
期刊：
Materials Kinetics
影响因子：
--
作者：
J. Mauro
通讯作者：
J. Mauro
影响因子：
3.7
作者：
Hwang, ST
通讯作者：
Hwang, ST