Fluoroalkylation FeOOH/PVDF Mixed Matrix Membrane: Preparation and Membrane Distillation Performance

Hai-fu Gao; Long-fei He; Jia-jing Sun; Chun-rui Wu; Hua-yan Chen; Xuan Wang; Xiao-long Lu

doi:10.11777/j.issn1000-3304.2025.25192

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Fluoroalkylation FeOOH/PVDF Mixed Matrix Membrane: Preparation and Membrane Distillation Performance

Research Article | 更新时间：2026-01-16

- Fluoroalkylation FeOOH/PVDF Mixed Matrix Membrane: Preparation and Membrane Distillation Performance
- Acta Polymerica Sinica Vol. 57, Issue 1, Pages: 143-156(2026)
- 作者机构：
  
  1.天津工业大学材料科学与工程学院先进分离膜材料全国重点实验室天津 300387
  2.天津工业大学化学工程与技术学院天津市绿色化工过程工程重点实验室天津 300387
  3.天津膜天膜科技股份有限公司天津 300457
- 作者简介：
  
  Chun-rui Wu, E-mail: wuchunrui@tiangong.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25192
  CLC：
- CSTR：32057.14.GFZXB.2025.7482
- Received：15 August 2025，
  
  Accepted：29 September 2025，
  
  Published Online：16 December 2025，
  
  Published：20 January 2026
- 稿件说明：
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高海富, 贺龙飞, 孙佳静, 武春瑞, 陈华艳, 王暄, 吕晓龙. 氟烷基化FeOOH/PVDF共混膜微结构调控及其膜蒸馏性能研究. 高分子学报, 2026, 57(1), 143-156.

Gao, H. F.; He, L. F.; Sun, J. J.; Wu, C. R.; Chen, H. Y.; Wang, X.; Lu, X. L. Fluoroalkylation FeOOH/PVDF mixed matrix membrane: preparation and membrane distillation performance. Acta Polymerica Sinica (in Chinese), 2026, 57(1), 143-156.
高海富, 贺龙飞, 孙佳静, 武春瑞, 陈华艳, 王暄, 吕晓龙. 氟烷基化FeOOH/PVDF共混膜微结构调控及其膜蒸馏性能研究. 高分子学报, 2026, 57(1), 143-156. DOI： 10.11777/j.issn1000-3304.2025.25192. CSTR： 32057.14.GFZXB.2025.7482.

Gao, H. F.; He, L. F.; Sun, J. J.; Wu, C. R.; Chen, H. Y.; Wang, X.; Lu, X. L. Fluoroalkylation FeOOH/PVDF mixed matrix membrane: preparation and membrane distillation performance. Acta Polymerica Sinica (in Chinese), 2026, 57(1), 143-156. DOI： 10.11777/j.issn1000-3304.2025.25192. CSTR： 32057.14.GFZXB.2025.7482.

摘要

膜蒸馏(MD)技术是海水淡化与高浓水体资源化的重要手段，优异的疏水性和均匀的孔结构是解决膜污染、润湿问题和保障MD高效运行的关键. 本工作设计了溶解同步功能化、羟基诱导相分离方法：基于水解缩合反应在铸膜液溶解过程中将全氟辛基三乙氧基硅烷(FAS)接枝于羟基氧化铁(FeOOH)纳米棒表面，形成氟硅烷化羟基氧化铁(F-FeOOH)，增强疏水性的同时解决纳米粒子团聚问题，进而在相分离成膜过程中通过F-FeOOH调控聚偏氟乙烯(PVDF)膜的晶型结构，规范聚合物链胶束生长与固化，优化膜表面及孔结构. 研究表明，F-FeOOH的引入，在增强材料化学疏水性的同时诱导PVDF分子链晶型向

晶型转变，改性膜疏水性显著提升，膜下表面的纯水接触角可达135.5°，相比于原膜提升了42.6%；膜孔径均匀性提升，最可几孔径占比达98.4%；MD通量达到38.5 kg/(m

·h)，与原膜相比提升了75.0%；膜截留率超过99.9%，且在30 h的防污染和抗润湿实验中表现出良好的稳定性.

Abstract

Membrane distillation (MD) is the key technique for resource extraction from high concentrate solutions. Hydrophobicity and pore size uniformity of the membranes are critical factors to solve membrane wetting problem and ensure the highly efficiency of MD process. In this work

a new idea of functionalisation of additives during dissolution process and modification of crystallization transformation of membrane materials during phase separation was proposed. Iron hydroxide oxide (F-FeOOH) nanorods were introduced in PVDF casting solution and fluorosilanated during the dissolution process. Then

the crystallization of the PVDF was modified owing to the interaction between the g

roups of modified nanorods and PVDF chains. The problem of nanorods aggregation could be solved

the hydrophobicity and pore size uniformity could be improved simultaneously just in traditional phase separation process. The effects of F-FeOOH synthesis on the variation of membrane structure and properties were investigated. The results demonstrated that the hydrophobicity of the F-FeOOH modified membranes were significantly enhanced

with the formation of a spherical particle structure on the down-surface and high pore size uniformity of the membranes. The water contact angle of the membranes could reach 135.5°

which was enhanced 42.6%

the percentage of the most probable pore size of the modified membrane increased to 98.4%

the MD flux reach 38.5 kg/(m

·h)

which was improved by 75.0%

and the retention rate for salt was kept over 99.9%. The modified membrane showed persistent stability in 30 h anti-fouling and anti-wetting experiments.

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references

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