Enhanced pervaporation dehydration performance of polyamide thin-film composite membrane with sodium alginate hydrophilic surface modification,Journal of Applied Polymer Science

当前位置： X-MOL 学术 › J. Appl. Polym. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Enhanced pervaporation dehydration performance of polyamide thin-film composite membrane with sodium alginate hydrophilic surface modification
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-10-03 , DOI: 10.1002/app.54734
Haixiang Sun _{1,

2} , Qi Jing ₁ , Yuhao Chen _{1,

2} , Juan Liu ₁ , Haixing Ye ₁ , Ming Wang ₂ , Peng Li ₂

Affiliation

Based on the solution-diffusion model of pervaporation (PV) technique, the development of thin-film composite membranes (TFC) with a highly hydrophilic surface and hydrophobic internal structure is more conducive to the rapid adsorption and desorption of water molecules to overcome the trade-off effect between flux and separation selectivity. Herein, the polyamide PV membrane was fabricated via interfacial polymerization (IP) with trimesoyl chloride (TMC) and polyethylenimine (PEI) as organic and aqueous phase monomer, respectively, on the hydrolyzed polyacrylonitrile (HPAN) substrate. Subsequently, the hydrophilic modification layer was prepared via sodium alginate (SA) crosslinking with Ca²⁺ to form the egg-box network. The results indicated the optimized TFC membrane exhibited high separation factor of 525.1 with desirable permeation flux of 2083.9 g m⁻² h⁻¹ for the pervaporation dehydration 85 wt% ethanol/water solution at 70°C. The modification method of hydrophilic surface opens up new avenues for the preparation of PV membrane with high separation performance and low-cost.

中文翻译：

海藻酸钠亲水表面改性增强聚酰胺薄膜复合膜渗透汽化脱水性能

基于渗透汽化（PV）技术的溶液扩散模型，开发具有高亲水性表面和疏水性内部结构的薄膜复合膜（TFC），更有利于水分子的快速吸附和解吸，克服贸易壁垒。通量和分离选择性之间的关闭效应。在此，通过界面聚合（IP）以均苯三甲酰氯（TMC）和聚乙烯亚胺（PEI）分别作为有机相和水相单体在水解聚丙烯腈（HPAN）基底上制备聚酰胺PV膜。随后，通过海藻酸钠(SA)与Ca ²⁺交联形成蛋盒网络来制备亲水改性层。结果表明，优化的TFC膜在70℃下渗透蒸发脱水85wt%乙醇/水溶液时表现出525.1的高分离因子和2083.9 g m ^-2 h ^-1的理想渗透通量。亲水表面的改性方法为制备高分离性能、低成本的光伏膜开辟了新途径。

更新日期：2023-10-03

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南