Self-adhesive polyethersulfone polyurethane carbon nanotubes fiber reinforced aerogel and its application in oil-water separation

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Structure Pub Date : 2025-02-07 DOI:10.1016/j.molstruc.2025.141682

Yanfei Gao , Yin Zhang , Yuqing Zhang , Kun Qi , Yuman Zhou , Jinfa Ming

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Abstract

The direct discharge of oily wastewater will seriously pollute water ecology and human health. Aerogel is ideal candidate to remedy the oily wastewater, but facing challenges for the usage of toxic small molecules crosslinker and the construction of elasticity. Herein, we adopt fiber self-adhesion mode, not crosslinker, to construct aerogel with ultra-light, high elasticity and excellent oil-water separation performance. And then, polyethersulfone/polyurethane/multi wall carbon nanotubes (PES/PU/MWCNTs) fiber aerogels are prepared by freeze-drying and heat treatment, and their ability to separate oil from water is explored through flux and separation efficiency tests. The addition of MWCNTs can enhance the mechanical properties of aerogels, and the compression stress of aerogels with 10 wt% MWCNTs is up to 2.6003 kPa. The density of PES/PU/MWCNTs-x composite fiber aerogel is stable at about 20–30 mg cm⁻³. By adjusting the content of MWCNTs, it is found that the aerogel with the parameter of 20 wt% MWCNTs has the best separation efficiency (99.97 %) and separation flux (32,897.67 L m⁻² h⁻¹). Our work provides a simple and effective construction scheme of fiber aerogel to solve the problem of oil-water separation.

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自粘聚醚砜聚氨酯碳纳米管纤维增强气凝胶及其在油水分离中的应用

含油废水的直接排放将严重污染水生态和人体健康。气凝胶是修复含油废水的理想选择，但面临着有毒小分子交联剂的使用和弹性结构的挑战。本文采用纤维自粘方式，而非交联剂，构建了超轻、高弹性、油水分离性能优异的气凝胶。然后，通过冷冻干燥和热处理制备聚醚砜/聚氨酯/多壁碳纳米管（PES/PU/MWCNTs）纤维气凝胶，并通过通量和分离效率试验探索其油水分离能力。MWCNTs的加入可以增强气凝胶的力学性能，添加10 wt% MWCNTs的气凝胶的压缩应力可达2.6003 kPa。PES/PU/MWCNTs-x复合纤维气凝胶的密度稳定在20 ~ 30 mg cm−3左右。通过调整MWCNTs的含量，发现MWCNTs含量为20 wt%时，气凝胶的分离效率为99.97%，分离通量为32,897.67 L m−2 h−1。为解决油水分离问题提供了一种简单有效的纤维气凝胶结构方案。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.