Effect of Polymer–Zeolite Interactions on the Separation Performance of Modified DD3R Membrane

IF 2.7 3区化学 Q2 POLYMER SCIENCE

Journal of Applied Polymer Science Pub Date : 2025-04-11 DOI:10.1002/app.57073

Mohammad Javad Vaezi, Hasan Javadi, Ali Akbar Babaluo

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Abstract

The effect of polymer–zeolite interactions was investigated by examining the coating parameters of cellulose acetate (CA) on the separation performance of DD3R membranes. Varying polymer concentrations and the number of coating stages, with an immersion time of 30 s, partially block nonzeolitic pores. Although low polymer solution concentrations result in higher blockage of nonzeolitic pores, a 30-s immersion time minimally affects separation performance. Extending the immersion time to 15 min increases polymer–zeolite interactions and pore blockage. The selective behavior of the blocked pores for CO₂ enhanced the selectivity of the modified membrane for CO₂/N₂ (113% of the theoretical perm selectivity value). This proves the hypothesis of using a selective polymer material to create a synergistic effect of the polymer with the zeolite layer in gas separation. In this synergy, the adsorption–diffusion mechanism in the DD3R zeolite pores and the solution–diffusion mechanism in the nonzeolite pores by CA play the gas separation role.

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聚合物-沸石相互作用对改性DD3R膜分离性能的影响

通过考察醋酸纤维素（CA）包覆参数对DD3R膜分离性能的影响，研究了聚合物-沸石相互作用的影响。不同的聚合物浓度和涂层阶段数，浸泡时间为30 s，部分阻塞非沸石孔隙。虽然较低的聚合物溶液浓度会导致非沸石孔隙的堵塞，但30秒的浸泡时间对分离性能的影响最小。将浸泡时间延长至15分钟会增加聚合物与沸石的相互作用和孔隙堵塞。堵塞孔对CO2的选择性行为提高了改性膜对CO2/N2的选择性（达到理论选择性值的113%）。这证明了在气体分离中使用选择性高分子材料使聚合物与沸石层产生协同效应的假设。在这种协同作用中，CA在DD3R沸石孔隙中的吸附-扩散机制和在非沸石孔隙中的溶解-扩散机制起到了气体分离的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Polymer Science 化学-高分子科学

CiteScore

5.70

自引率

10.00%

发文量

1280

审稿时长

2.7 months

期刊介绍： The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.