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通过构建三维水友网络,对具有化学抗性的聚四乙烯 (PTFE) 毛细膜进行水友性修改

Mingpeng Hou¹, Qiuying Li¹, Yanchao Che²

¹School of Material Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.

|April 27, 2024

概括

这项研究通过创建水友网络来增强用于过水的聚四乙烯 (PTFE) 膜. 经过修改的PTFE毛细管膜显示出改善的水流和化学阻力.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

聚四乙烯 (PTFE) 毛细管膜具有出色的化学和热电阻,广泛用于分离技术.
PTFE固有的疏水性限制了其在水过应用中的有效性.
开发增强PTFE水友性的方法对于扩大其在水处理中的使用至关重要.

研究的目的:

开发一种用于修改PTFE毛细管膜的新方法,以提高其水友性和水流量.
为了研究改造膜的化学稳定性和结构完整性.
评估这些改造膜在先进水过方面的潜力.

主要方法:

自由基共聚合的烯胺 (AM),N,N-甲基基烯胺 (MBA) 和乙烯三西兰 (VTES).
解-凝聚着西兰键,形成与PTFE物理交织在一起的3D水友网络.
修改膜的特性,包括水接触角度测量和纯水流量测试.
通过沉浸在酸性,性和氧化溶液中评估化学耐药性.

主要成果:

经过修改的PTFE毛细管膜显示水接触角度显著减少 (24.3-61.2%的减少).
纯水流量从0大幅增加到1732.7-2666.0 L/m2·h.
增强的水友性归因于引入的胺和西洛基以及增加的表面粗度.
经过修改的膜在强化学溶液 (HCl,NaOH,NaClO) 中浸泡2周后保持了水友性和结构完整性.

结论:

开发了一种成功的方法来制造具有水友性和耐化学物质的PTFE毛细管膜.
修改后的膜显示了提高水过效率的巨大潜力.
这一进步解决了传统PTFE膜在水处理应用中的局限性.

关键词:

PTFE毛细体膜的毛细体膜是什么耐化学性耐化学性耐化学性水友性修饰是一种水友性修饰.水过水的过方法

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