具有梯度疏水性的光热多孔材料,用于快速和高选择性油/水分离和原油开采。

IF 3.9 3区 医学 Q1 ENGINEERING, MULTIDISCIPLINARY
Tianwen Wang, Song Song, Shiwen Bao, Yanfeng Gong, Yujue Wang, Chuncai Wang, Wenshao Ma, Nuo Liu, Kunyan Sui, Jun Gao, Xueli Liu
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引用次数: 0

摘要

石油泄漏和含油废水排放对生态系统和人类健康构成了严重威胁,但有效的清理和回收仍然是一个巨大的挑战。由于原油的高粘度,它的吸收特别困难。在本研究中,我们提出了一种将沙漠甲虫的背激发梯度疏水性与光热效应相结合,以提高吸收率的策略,以快速和高选择性地吸收原油以及其他油和可变粘度的有机溶剂。采用烷基硅烷基梯度化学改性法对mxene -聚氨酯海绵进行了吸油材料的制备。复合海绵的疏水梯度为海绵中的选择性油润湿提供了额外的驱动力。由于梯度润湿性与光热加热之间的协同作用,对稠油、稀油、轻柴油等多种油的吸附速率和分离速率都比无梯度润湿性时要快。所制备的材料吸油性能稳定,重复性好。表面硅烷改性也被证明有助于防止MXene的氧化,促进材料的长期稳定性。本研究对快速、高选择性液体吸收剂的开发具有一定的指导意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photothermal Porous Material with Gradient Hydrophobicity for Fast and Highly Selective Oil/Water Separation and Crude Oil Recovery.

Oil spills and oily wastewater discharges have posed severe threats to the ecosystem and human health, yet efficient cleanup and recovery remain huge challenges. The absorption of crude oil is especially difficult due to its high viscosity. In this study, we propose a strategy for the fast and highly selective absorption of crude oil as well as other oils and organic solvents with variable viscosity by combining the desert beetle's back-inspired gradient hydrophobicity with the photothermal effect to enhance the absorption rate. The oil-absorbent material was prepared through the alkylsilane-based gradient chemical modification of MXene-polyurethane sponges. The hydrophobic gradient across the composite sponge offers an extra driving force for the selective oil wetting in the sponge. Owing to the synergistic effect between gradient wettability and photothermal heating, a faster absorption rate, in addition to the high separation rate, was achieved for a variety of oils, including thick crude oil, thin crude oil, and light diesel oil, compared to that without gradient wettability. The as-prepared material is robust with good repeatability for the oil absorption. The surface silane modification was also demonstrated to help prevent the oxidation of MXene, facilitating the long-term stability of the material. This study will enlighten the development of fast and highly selective liquid absorbents.

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来源期刊
Biomimetics
Biomimetics Biochemistry, Genetics and Molecular Biology-Biotechnology
CiteScore
3.50
自引率
11.10%
发文量
189
审稿时长
11 weeks
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