构建具有高密度水友微区域的自我修复的聚硫膜,通过二维限制通道进行增强染料/盐的选择性分离
Shenghui Liu1, Jintuan Zhang2, Anette Theliander3
1College of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin ,541004, China.
Environmental research
|January 22, 2024
概括
这项研究开发了一种使用-层双氧化物 (MgAl-LDH) 的自我愈合超膜,以有效地分离染料和盐,同时抵抗膜损伤. 这种创新的膜具有出色的透性,分离效率和污染防治性能,用于废水处理.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 由于膜污染和损伤,染料/盐废水带来了重大挑战,影响了分离效率.
- 现有的超膜在处理复杂的废水流时,通常会受到性能和寿命的降低.
研究的目的:
- 构建一个具有自我愈合能力的2D紧密超膜,以改善染料/盐分离.
- 通过解决膜损伤和污染问题来提高膜的耐用性和效率.
- 为了研究使用二维-层双氧化物 (MgAl-LDH) 的自我愈合和透性能的兼容性.
主要方法:
- 制造一个2D紧密的超膜,包含MgAl-LDH.
- 通过AMPS-PAN的胀来评估物理自我愈合,通过流量,盐保持,SEM和机械强度来评估.
- 通过涉及CC和聚硫链的反应评估化学自我愈合,通过XPS,流量,盐保持和机械性能得到证实.
- 使用分离选择性 (ɑ) 量化染料/盐分离效率,并分析透流量,盐保留率和染料保留率.
- 使用污染指数和接触角测量测试反污染性能.
主要成果:
- 膜表现出对物理和化学损伤的有效自我愈合,在损伤后恢复性能.
- 实现了高染料/盐分离效率,甲基蓝的保留率为97.7%,特定透流量为99.1L/m2h.
- 2D MgAl-LDH 材料促进了自我愈合和透性能之间的平衡.
- 膜表现出极好的防污染性能,如污染指数和接触角结果所示.
结论:
- 使用MgAl-LDH开发的2D超膜显示出对高效和持久的染料/盐废水处理具有显著的前景.
- 自愈能力提高了膜的寿命,并保持了高分离性能在受污染的环境中.
- 这种材料为应对工业废水应用中膜污染和降解的挑战提供了可行的解决方案.
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