Role of the side chain configuration on the effective recovery of phenolic compounds using polymer inclusion membranes based on tertiary amine

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2024-08-24 DOI:10.1016/j.reactfunctpolym.2024.106030

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Abstract

Polymer inclusion membranes (PIMs) exhibit great potential in the separation and recovery of valuable materials from wastewater and secondary resources. In this work, the effect of alkyl chain configuration of the functional carriers on the physicochemical properties and permeability of PIMs was investigated. Three tertiary amine isomers with different alkyl chain configurations were selected as carriers: trioctylamine, triisooctylamine, and tris(2-ethylhexyl)amine. Operating conditions like carrier contents, feed solution pH, phenol concentration, and stripping solution properties were also investigated. The results obtained in this study indicate that tertiary amines with less branched alkyl chains perform better phenol transport efficiency. Furthermore, the transport efficiency decreased rapidly with increasing steric hindrance of the carriers. Trioctylamine-based PIM displayed optimal extraction efficiency of 92.8 % and stripping efficiency of 90.8 % due to its lower steric hindrance, higher hydrophilicity, and larger crystallinity. Phenol extraction and stripping efficiencies remained above 85.7 % and 80.8 % after 8 cycles, demonstrating excellent stability.

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侧链构型对使用基于叔胺的聚合物包合膜有效回收酚类化合物的作用

聚合物包涵膜（PIMs）在从废水和二次资源中分离和回收有价值物质方面具有巨大潜力。在这项工作中，研究了功能载体的烷基链构型对 PIM 的理化性质和渗透性的影响。研究选择了三种具有不同烷基链构型的叔胺异构体作为载体：三辛胺、三异辛胺和三（2-乙基己基）胺。此外，还研究了载体含量、进料溶液 pH 值、苯酚浓度和汽提溶液特性等操作条件。研究结果表明，支链烷基较少的叔胺具有更好的苯酚迁移效率。此外，随着载体立体阻碍的增加，传输效率迅速降低。基于三辛胺的 PIM 具有较低的立体阻碍、较高的亲水性和较大的结晶度，其最佳萃取效率为 92.8%，汽提效率为 90.8%。苯酚萃取效率和汽提效率在 8 次循环后仍分别保持在 85.7 % 和 80.8 % 以上，显示出极佳的稳定性。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.