Comparative Study on Pervaporation Performance of Polyphosphazene Membranes with Different Fluorine Side Groups for Thiophene/n-Heptane Separation.

IF 4.7 3区工程技术 Q1 POLYMER SCIENCE

Polymers Pub Date : 2025-06-05 DOI:10.3390/polym17111573

Bingcong Xu, Xingmei Zhang, Wenwen He, Xiaolong Han

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Abstract

In recent years, polyphosphazene (POP) membranes have been gaining more and more attention owing to their excellent pervaporation desulfurization performance. To develop new POP membranes, three kinds of POPs with different side groups, Poly[bis(trifluoroethoxy)phosphazene] (PTFEP), Poly[bis(trifluorobutoxy)phosphazene] (PTFBP), and Poly[bis(octafluoropentyloxy)phosphazene] (POFPP), were synthesized. The NMR spectroscopy demonstrated that POPs with a designed structure were successfully prepared. Subsequently, the composite membranes based on these POPs were fabricated by solution casting. The influence of side groups on the desulfurization performance of membranes was systematically evaluated via a pervaporation test. Among these membranes, the PTFBP membrane exhibited the highest separation efficiency, significantly outperforming other membrane types with a permeation flux of 0.284 kg·m^-2·h^-1 at 200 ppm and 85 °C, along with a sulfur enrichment factor of 26.48. In addition, the effects of temperature and feed concentration on separation performance were investigated in detail.

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不同氟侧基聚磷腈膜对噻吩/正庚烷分离渗透汽化性能的比较研究

近年来，聚磷腈（POP）膜因其优异的渗透汽化脱硫性能而受到越来越多的关注。为研制新型POP膜，合成了具有不同侧基的聚[双（三氟乙氧基）磷腈]（PTFEP）、聚[双（三氟丁氧基）磷腈]（PTFBP）和聚[双（八氟辛基）磷腈](POFPP) 3种POP膜。核磁共振波谱分析表明，成功制备了具有设计结构的持久性有机污染物。随后，采用溶液铸造法制备了基于这些持久性有机污染物的复合膜。通过渗透蒸发试验系统地评价了侧基对膜脱硫性能的影响。其中，PTFBP膜的分离效率最高，在200 ppm和85℃条件下，其渗透通量为0.284 kg·m-2·h-1，硫富集系数为26.48。此外，还研究了温度和进料浓度对分离性能的影响。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.