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优化纳米过膜层层的修改:化学和形态洞察力

Tanaz Moghadamfar^1,2, Rodrigo Rocha de Oliveira³, José Luis Cortina^1,2,4

¹Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya (UPC)-Barcelona TECH, Campus Diagonal-Besòs, 08930 Barcelona, Spain.

ACS applied polymer materials

|July 17, 2025

概括

层次的修改增强了纳米过膜,以改善多价值离子去除. 这项研究优化了表面特性,显著提高了废水处理应用中和离子的选择性.

关键词:

强大的生活-XNN 复合膜是复合膜的一种.平板板膜是一种平板板膜.聚电解质多层的多层电解质.增强选择性的增强选择性

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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:

纳米过 (NF) 膜对于在水处理和工业中分离多价离子至关重要.
膜污染和寿命缩短需要表面修改策略.
层对层 (LBL) 技术提供了一种方法来提高NF膜的性能和防腐 properties.

研究的目的:

评估LBL修改对半芳香聚胺NF膜 (Fortilife-XN) 的影响.
分析LBL处理后表面特性,形态和离子排斥的变化.
优化LBL修改参数,以提高多价值离子分离中的性能.

主要方法:

使用聚4-styrenesulfonate (PSS) 作为聚和聚二甲基化 (PDADMAC) 或聚乙烯化 (PAH) 作为聚的LBL修改.
使用FTIR,圆测量和拉曼成像等技术,对膜表面特性 (接触角度,粗度,形态,厚度) 的表征.
使用混合盐溶液 (NaCl,CaSO4,MgSO4) 进行初步纳米过试验,以评估离子选择性和透性.

主要成果:

LBL的修改改变了膜表面的特性,特定的双层组合显示了增强的湿透性和粗性.
FTIR和拉曼成像证实了成功的多层沉积和结构变化.
与裸体膜相比,修改后的膜对Na/Ca (高达134%) 和Na/Mg (高达131%) 的选择性显著增加.

结论:

LBL修改是一种有效的策略,可以提高聚胺NF膜的性能,用于多价离子离子分离.
表面性能分析为LBL参数对膜性能的影响提供了关键的见解.
优化的LBL修改膜显示了在废水处理和盐水管理中提高效率的潜力.