制备具有更高性能和耐氯性的绿色木糖基纳滤膜

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-10-24 DOI:10.1016/j.desal.2024.118243

Yumeng Xie , Jing Ren , Peng Liu , Junfeng Zheng , Zhaohuan Mai , Yanyan Liu , Xuewu Zhu , Xin Li , Daliang Xu , Heng Liang

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引用次数: 0

摘要

纳滤技术因其出色的渗透性和选择性，尤其是在小分子溶质分离方面，已被广泛应用于饮用水净化领域。然而，在预处理过程中使用氧化剂进行污垢控制会威胁纳滤膜的结构，导致分离性能下降。在此，我们利用木糖作为界面聚合过程中的水性单体，制作了一种聚酯纳滤膜。由于木糖单体具有丰富的羟基和较低的反应活性，聚酯膜具有亲水性和较薄的分离层，因而具有较高的透水性，最佳值为 28.7 L-m-2-h-1-bar-1。制作的聚酯膜具有高交联结构和带负电荷的表面，对 Na2SO4 的排斥率高达 95.4%。此外，聚酯膜的低电子捐献特性确保了其对活性氯的化学稳定性。这使得聚酯膜在广泛的 pH 值范围内进行耐氯测试后，性能相对稳定。这项研究提出了一种采用绿色单体制造纳滤膜的可行方法，这种膜具有出色的分离性能和强大的耐氯性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Fabrication of green xylose-based nanofiltration membrane with enhanced performance and chlorine resistance

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Fabrication of green xylose-based nanofiltration membrane with enhanced performance and chlorine resistance

Nanofiltration technology has been widely used in drinking water purification due to its excellent permeance and selectivity properties, especially in small molecular solute separation. However, using oxidizing agents in the pretreatment process for fouling control threatens the nanofiltration membrane structure, leading to the deterioration of the separation performance. Herein, we fabricate a polyester nanofiltration membrane utilizing xylose as an aqueous monomer in the interfacial polymerization process. Due to abundant hydroxyl groups and low reactivity of xylose monomers, the polyester membrane possessed a hydrophilic and thin separation layer, which led to high water permeance with the optimal value of 28.7 L·m⁻²·h⁻¹·bar⁻¹. Possessing highly cross-linking structures and negatively charged surfaces, the fabricated polyester membranes showed an excellent Na₂SO₄ rejection of up to 95.4 %. In addition, the low electron-donating property of polyester membranes ensured their chemical stability toward active chlorine. This endows relatively stable performance of the polyester membrane after chlorine resistance tests in a wide pH range. This study presents a feasible approach employing green monomers for fabricating nanofiltration membranes with outstanding separation performance and robust chlorine resistance.

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.