Ternary liquid separation using PVDF nanofiber membranes with tunable structure and surface tension

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE

Macromolecular Research Pub Date : 2023-12-15 DOI:10.1007/s13233-023-00219-5

Kyu Hong Kyung, Sae Hoon Kim, Jin Ho Kim

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引用次数: 0

Abstract

Wastewater from industrial sources varies greatly in composition. Separating and recycling these waste remains challenging. The efficacy of nanofiber membranes in separating binary liquids has been demonstrated, which in this work we extend to the separation of ternary liquids. Polyvinylidene fluoride (PVDF) nanofiber membranes with different surface tensions were fabricated by electrospinning and surface coating. Membranes made from polyvinyl alcohol and polyacrylic acid (PVA-PAA), and PVDF nanofiber membranes were used in combination for separating water and oils. And pure PVDF and PVDF membranes coated with tetraethyl orthosilicate and decyltrimethoxysilane (TEOS/DTMS) were used together to separate different oils. The structural parameters of PVDF nanofiber membranes, e.g., pore size, thickness, and porosity were easily adjusted to achieve high flux and separation efficiency. For example, the average separation efficiencies for water, oleic acid, and silicon oil were 99.21%, 94.45%, and 84.61%, respectively. Finally, using a two-step setup, a ternary liquid mixture of water, oleic acid, and silicon oil was efficiently separated, which shows great promise for addressing the problem of separating wastewater with mixed compositions.

Graphical abstract

Schematic illustration of wettability relationship of PVDF membrane

Abstract Image

查看原文本刊更多论文

使用具有可调结构和表面张力的 PVDF 纳米纤维膜进行三元液体分离

工业废水的成分千差万别。分离和回收这些废水仍然是一项挑战。纳米纤维膜在分离二元液体方面的功效已得到证实，在这项工作中，我们将其扩展到分离三元液体。我们通过电纺丝和表面涂层制造了具有不同表面张力的聚偏二氟乙烯（PVDF）纳米纤维膜。将聚乙烯醇和聚丙烯酸（PVA-PAA）制成的膜与 PVDF 纳米纤维膜结合起来用于分离水和油。纯 PVDF 膜和涂有正硅酸四乙酯和癸基三甲氧基硅烷（TEOS/DTMS）的 PVDF 膜一起用于分离不同的油。PVDF 纳米纤维膜的结构参数（如孔径、厚度和孔隙率）很容易调整，以获得高通量和分离效率。例如，水、油酸和硅油的平均分离效率分别为 99.21%、94.45% 和 84.61%。最后，通过两步设置，水、油酸和硅油的三元液体混合物得到了高效分离，这为解决混合成分废水的分离问题带来了巨大希望。图文摘要 PVDF 膜的润湿性关系示意图

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.