| Fabrication of antifouling polyamide reverse osmosis membrane by surface grafting of dulcitol |
| Authors： ZHANG Xiaoyu1,2, TIAN Xinxia2， JING Zhaojing3， TIAN Lei2，WANG Haitao1， WEI Yangyang2， CHANG Na4， WANG Jian2， LI Zhaokui2 |
| Units： 1.School of Environmental Sciences and Engineering， Tiangong University， Tianjin 300387, China；2. The Institute of Seawatre Desalination and Multipurpose Utilization, MNR(Tianjin)， Tianjin 300192, China； 3. School of Textile Science and Engineering， Tiangong University， Tianjin 300387, China；4. School of Chemical Engineering and Technology，Tiangong University， Tianjin 300387, China |
| KeyWords： reverse osmosis membrane; dulcitol; grafting; water flux；antifouling |
| ClassificationCode：TQ051.893 |
| year,volume(issue):pagination： 2025,45(2):30-39 |
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Abstract： |
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?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. |
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Funds： |
| 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） |
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AuthorIntro： |
| 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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Reference： |
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