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用于油水分离的超疏水/超亲油硬脂酸与聚合物改性磁性聚氨酯的合成:聚合物性质的影响

Synthesis of Superhydrophobic/Superoleophilic stearic acid and Polymer-modified magnetic polyurethane for Oil-Water Separation: Effect of polymeric nature.

作者信息

Satria Mauliady, Saleh Tawfik A

机构信息

Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.

Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.

出版信息

J Colloid Interface Sci. 2023 Jan;629(Pt B):522-534. doi: 10.1016/j.jcis.2022.08.180. Epub 2022 Sep 5.

Abstract

The superhydrophobic/superoleophilic materials based on polyurethane foams have been layered with three different polymers and extensive modification with iron/magnetic nanocomposite. The general desires are to study the effect of the polymer layer and to eliminate the oil contaminant from the oil-water system which is crucial due to the development of environmental technologies. These materials were generated by facile dip-coating two-step method on the polyurethane foams (PUF) surface. PUF was directly layered with polydopamine/polypyrrole/polyaniline (PDA/PPy/PANI) and incorporated with Fe-SA (stearic acid) nanocomposites by ultrasonication and refluxing. In addition, characterization by FTIR, SEM/EDX, XRD, and TGA presented that the polymer layer and Fe-SA nanocomposites successfully covered the PUF surface caused by the chelating interaction between the carboxylates and active sites on iron particles due to intermolecular hydrogen bond interaction. Interestingly, the water contact angle (WCA) measurement of the nanocomposites displayed that the contact angle significantly improved up to 164°. After 20 cycles of oil absorption capacity, the WCA steadily remained up to 153° indicating powerful superhydrophobic properties of the materials. Furthermore, the oil absorption capacity of the materials was evaluated using typical oil-water separation methods such as reusability, separation efficiency, and oil permeate flux. The results exhibited that the modified PUFs have enhanced the absorption capacity up to 44 times the foam weight, 99 % separation efficiency, and about 8000 L.m.h oil flux. For oil removal, the dyed oil phase was rapidly absorbed within 2 s confirming the highly used products for a wide area of oil-water separation. PDA-coated PUF nanocomposites obtained the most outstanding results due to their remarkable interfacial adhesion properties which provide larger active functional groups for hydrogen bonding interaction on PUF surface and Fe-SA nanocomposites.

摘要

基于聚氨酯泡沫的超疏水/超亲油材料已与三种不同的聚合物分层,并通过铁/磁性纳米复合材料进行了广泛改性。总体目标是研究聚合物层的作用,并从油水体系中去除油污,这对于环境技术的发展至关重要。这些材料是通过在聚氨酯泡沫(PUF)表面采用简便的浸涂两步法制备的。PUF直接与聚多巴胺/聚吡咯/聚苯胺(PDA/PPy/PANI)分层,并通过超声处理和回流与Fe-SA(硬脂酸)纳米复合材料结合。此外,通过傅里叶变换红外光谱(FTIR)、扫描电子显微镜/能谱仪(SEM/EDX)、X射线衍射仪(XRD)和热重分析仪(TGA)表征表明,由于羧酸根与铁颗粒上活性位点之间的螯合相互作用以及分子间氢键相互作用,聚合物层和Fe-SA纳米复合材料成功覆盖了PUF表面。有趣的是,纳米复合材料的水接触角(WCA)测量显示,接触角显著提高至164°。经过20次吸油能力循环后,WCA稳定保持在153°,表明该材料具有强大的超疏水性能。此外,使用可重复使用性、分离效率和油渗透通量等典型的油水分离方法评估了材料的吸油能力。结果表明,改性后的PUF吸油能力提高到泡沫重量的44倍,分离效率达到99%,油通量约为8000 L·m⁻¹·h⁻¹。对于除油,染色油相在2秒内迅速被吸收,证实了该产品在广泛的油水分离领域的高实用性。由于其卓越的界面粘附性能,PDA包覆的PUF纳米复合材料获得了最优异的结果,这种性能为PUF表面和Fe-SA纳米复合材料上的氢键相互作用提供了更大的活性官能团。

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