膜科学与技术

己六醇表面接枝改性制备抗污染聚酰胺反渗透膜研究

作者：张笑雨¹，²，田欣霞²，荆兆敬³，田磊²，王海涛¹，魏杨扬²，常娜⁴，王剑²，李兆魁²

单位： 1. 天津工业大学环境科学与工程学院，天津 300387； 2. 自然资源部天津海水淡化与综合利用研究所，天津 300192； 3. 天津工业大学纺织科学与工程学院，天津 300387；4. 天津工业大学化学工程与技术学院，天津 300387

关键词：反渗透膜；己六醇；接枝改性；水通量；抗污染

DOI号： 10.16159/j.cnki.issn1007-8924.2025.02.004

分类号： TQ051.893

出版年,卷(期):页码： 2025,45(2):30-39

摘要：

芳香族聚酰胺反渗透膜已广泛应用于海水及苦咸水淡化、废水处理及回用等领域，然而膜污染一直是制约反渗透系统经济性、稳定性和可靠性的关键问题之一。利用界面聚合后聚酰胺表面残留的酰氯基团，以己六醇为抗污染功能单体，对聚酰胺膜进行表面接枝改性，制备抗污染的高通量反渗透膜。实验结果表明，改性后的反渗透膜具有更小的接触角、更大的粗糙度、更大的水通量及更强的抗污染性。在保持脱盐率不变的前提下，改性膜（M-2）的水通量较未改性膜提高46.6%[达到61.0 L/(m2·h）]。采用牛血清蛋白进行膜表面污染实验，改性膜（M-2）的水通量下降率（17.4%）低于未改性膜（20.0%），采用纯水清洗后，改性膜（M-2）的通量恢复率（87.3%）高于未改性膜（84.1%）。结果显示，己六醇表面接枝改性反渗透膜能显著提高膜的水通量和抗污染性能。

?Aromatic polyamide (PA) reverse osmosis (RO) membranes have been extensively employed in seawater desalination, brackish water desalination and wastewater treatment-reuse. However, membrane fouling remains a critical issue that restricts the economy, stability and reliability of RO systems. Herein, dulcitol was used as the antifouling functional monomer to modify the RO membrane by reacting with the residual acyl chloride groups on the surface of PA layer. The experimental results showed that the modified membrane exhibited a decreased water contact, enhanced roughness, increased water flux and enhanced anti-fouling property. The water flux of the modified membrane (M-2) was increased by 46.6% [up to 61.0 L/(m2·h)] , while the rejection rate was remained, compared with that of the unmodified membrane. The water flux reduction rate (17.4%) of modified membrane (M-2) was lower than that of unmodified membrane (20.0%), and the flux recovery rate (87.3%) of modified membrane (M-2) was higher than that of unmodified membrane (84.1%) after cleaning with pure water. These results suggested that the dulcitol grafting can improve the water flux and antifouling property of RO membranes.

基金项目：

国家重点研发计划（2023YFE0101000）；天津市科技计划项目（23ZGCXQY00040）；中央级公益性科研院所基本科研业务费专项资金项目（K-JBYWF-2024-QR-04，K-JBYWF-2024-T07）

作者简介：

张笑雨（1997-），女，河北邯郸人，硕士生，研究方向为抗污染反渗透膜

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