聚四氟乙烯膜的超疏水改性及应用研究进展

doi:10.13475/j.fzxb.20240304602

纺织学报 ›› 2024, Vol. 45 ›› Issue (08): 65-71.doi: 10.13475/j.fzxb.20240304602

• 纺织科技新见解学术沙龙专栏:先进非织造品与技术 • 上一篇下一篇

聚四氟乙烯膜的超疏水改性及应用研究进展

李成才¹^,², 朱登辉¹, 朱海霖¹^,², 郭玉海¹()

1.浙江理工大学纺织科学与工程学院(国际丝绸学院), 浙江杭州 310018
2.现代纺织技术创新中心(鉴湖实验室), 浙江绍兴 312030

收稿日期:2024-03-19 修回日期:2024-05-10 出版日期:2024-08-15 发布日期:2024-08-21
通讯作者: 郭玉海(1973—),男,研究员,博士。主要研究方向为高分子材料。E-mail:gyh@zstu.edu.cn。
作者简介:李成才(1990—),男,讲师,博士。主要研究方向为高分子分离膜材料制备。
基金资助:
国家自然科学基金青年科学基金资助项目(52303160)

Research progress of superhydrophobic modification and application of polytetrafluoroethylene membrane

LI Chengcai¹^,², ZHU Denghui¹, ZHU Hailin¹^,², GUO Yuhai¹()

1. College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 300318, China
2. Innovation Center of Advanced Textile Technology (Jianhu Laboratory), Shaoxing, Zhejiang 312030, China

Received:2024-03-19 Revised:2024-05-10 Published:2024-08-15 Online:2024-08-21

摘要/Abstract

摘要：

超疏水聚四氟乙烯膜材料具有突出的化学稳定性、高耐热性、强疏水性和高断裂韧性等优点,在膜分离技术领域中广泛应用。为开发高效、低成本、耐久稳定、绿色环保的超疏水改性技术,根据聚四氟乙烯膜的超疏水改性原理,从聚四氟乙烯分子化学结构出发,分析了2种改性机制“不改变聚四氟乙烯的化学结构”和“改变聚四氟乙烯的化学结构”,介绍了超疏水聚四氟乙烯膜材料制备和改性中的优缺点,阐述了超疏水聚四氟乙烯膜材料的功能性应用形式和领域,最后探讨了超疏水聚四氟乙烯膜材料目前存在的问题及未来发展的方向,以期为高性能超疏水聚四氟乙烯膜材料的进一步研究提供参考。

关键词: 分离膜材料, 聚四氟乙烯膜, 超疏水, 改性方法, 分离技术

Abstract:

Significance Surfaces with special wetting behavior, especially superhydrophobic surfaces with high water contact angles greater than 150° and low slide angles less than 10°, have attracted attention because they can be used in a variety of applications requiring special surface properties, such as anti-corrosion, self-cleaning, and drag reduction. Polyterafluoroethylene(PTFE) is a good material for preparing superhydrophobic membranes because of its good thermal stability, chemical resistance, low surface energy and low thermal conductivity. However, the surface of the membrane material prepared by PTFE resin cannot meet the requirements of superhydrophobic, so the superhydrophobic modification becomes the focus of research.

Progress In this paper, the preparation, modification and application of PTFE membranes were reviewed. The advantages and disadvantages of different processes for the preparation and modification of superhydrophobic PTFE membrane were summarized. According to the superhydrophobic modification principle of PTFE membrane and the molecular chemical structure of PTFE, two modification mechanisms of "not changing the molecular structure of PTFE" and "changing the molecular structure of PTFE" were analyzed. Based on practical cases, the early modification methods such as laser etching, ion irradiation and plasma etching are introduced one by one, and their shortcomings are analyzed. The super hydrophobic modification of PTFE further reduces the surface energy of the membrane, which can solve the problems of easy contamination, poor selective permeability and short service life. Finally, the application of super hydrophobic PTFE membrane in oil-water separation, membrane distillation, printing and dyeing wastewater treatment is introduced.

Conclusion and Prospect The preparation technology of superhydrophobic PTFE membrane was summarized into two types: "no change in the chemical structure of PTFE" and "change in the chemical structure of PTFE". The first method is relatively simple and economical, but because most of the bonding methods are physical bonding, its bonding strength is low, the superhydrophobicity cannot be maintained over time, and it is prone to secondary pollution. The second method is fast, easy to control the surface structure, and has good hydrophobicity retention, but the molecular structure of PTFE is destroyed, which will adversely affect the mechanical strength and chemical stability of the membrane. Subsequent development should be carried out from the following aspects. 1) The selection of environmentally friendly nanoparticles and the enhancement of partical bonding strength and uniformity should be extensively explored. Nanoparticles should be combined with the industrial production process of PTFE membrane, and the process of dual-directional stretching to prepare PTFE membrane should be added to form a superhydrophobic PTFE membrane in one step. 2) A mild and efficient surface construction method, which can reduce the damage to the PTFE membrane substrate as much as possible while obtaining super hydrophobicity should be developed to achieve the coexistence of functional performance and strength. 3) The density ratio between the crystalline state and the amorphous state of PTFE should be controlled during membrane making, and the surface energy of PTFE should be reduced by increasing the amorphous state density, so as to directly realize the super hydrophobic of PTFE membrane.

Key words: separation membrane material, polytetrafluoroethylene membrane, superhydrophobic, modification method, separation technique

中图分类号:

TQ342.711

李成才, 朱登辉, 朱海霖, 郭玉海. 聚四氟乙烯膜的超疏水改性及应用研究进展[J]. 纺织学报, 2024, 45(08): 65-71.

LI Chengcai, ZHU Denghui, ZHU Hailin, GUO Yuhai. Research progress of superhydrophobic modification and application of polytetrafluoroethylene membrane[J]. Journal of Textile Research, 2024, 45(08): 65-71.

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链接本文: http://www.fzxb.org.cn/CN/10.13475/j.fzxb.20240304602

http://www.fzxb.org.cn/CN/Y2024/V45/I08/65

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聚四氟乙烯膜的超疏水改性及应用研究进展

Research progress of superhydrophobic modification and application of polytetrafluoroethylene membrane

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