Construction of electroneutral hollow fiber loose nanofiltration separation layer based on aldol condensation reaction and the investigation on dye removal |
Authors: TANG Shenyi,WU Biao, CUI Zhenyu |
Units: 1. School of Material Science and Engineering, Tiangong University, Tianjin 300387,China; 2. Tianjin TisunItacsa Technology CO., LTD, Tianjin 300382, China |
KeyWords: electroneutrality; chemical cross-linking; hollow fiber membrane; loose nanofiltration; dye removal |
ClassificationCode:TQ028,TB34 |
year,volume(issue):pagination: 2024,44(2):125-133 |
Abstract: |
In this work, polyvinylidene fluoride (PVDF)/styrene maleic anhydride (SMA) hollow fiber ultrafiltration membrane was used as a substrate matrix, a robust and compact electroneutral hollow fiber loose nanofiltration (LNF)separation layer was constructed based on the aldol condensation reaction by sequentially introducing three hydrophilic compounds (triethylene glycol (TEG), glutaraldehyde (GA), polyvinyl alcohol (PVA)) on the membrane surface. The microstructural characteristics and separation performance of the membrane were systematically analysed. The acquired results indicated hydrophilicity gradually increased and charge relatively neutral as chemical reaction occurred. Both negatively charged Sunset Yellow (SY) and positively charged Crystal Violet (CV) dyes can be completely removed while maintaining high permeation flux (27.8 L/(m2 h), 28.9 L/(m2 h)). In addition, the membrane exhibited excellent chemical stability and long-term operation stability. This work provides a novel method to fabricate electroneutral hollow fiber LNF membrane with high separation performance. |
Funds: |
国家自然科学基金面上项目(21978213) |
AuthorIntro: |
汤申艺(1998-),女,山东聊城人,硕士生,主要从事膜材料制备及应用研究,E-mail:932624861@qq.com |
Reference: |
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