利用光热转化机理，一步法简便地构建疏水海绵，实现对泄漏原油的优越吸附和回收

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-17 DOI:10.1016/j.colsurfa.2025.137246

Di Zhang , Kai Yue , Jingyuan Zhao , Ruirui Zhao , Xuejie Wang , Xinyue Liu , Wenhao Geng

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引用次数: 0

摘要

原油是一种重要的不可再生化石燃料。令人遗憾的是，大量原油泄漏到海里。因此，开发具有优异吸附和回收性能的新型材料对泄漏原油进行资源化利用已迫在眉睫。本文以碳纳米管（CNTs）和聚二甲基硅氧烷（PDMS）为原料，采用简单的一步法构建了改性海绵（CNTs/PDMS@SP）。该海绵具有良好的疏水性，水接触角为142°，对原油和几种有机溶剂具有较高的吸附能力，并具有优异的自清洁性能。此外，CNTs/PDMS@SP具有优异的油水分离性能（高达98 %）。经过10次循环后，分离效率仍高达96.6% %。此外，在光照下，由于CNTs/PDMS@SP光热转化的快速升温，原油的粘度迅速降低，这使得改性海绵具有对原油的快速吸附能力。在1.0 kW/m2条件下，改性海绵的表面温度可达60℃左右，对原油的吸附量高达13.12 原油/吸附剂。在1.0 kW/m2的条件下，经过多次循环后，CNTs/PDMS@SP的表面温度始终保持在60°C以上，且光照断断续续，证明了其出色的光热稳定性。令人兴奋的是，即使经过20次吸附-挤压循环，CNTs/PDMS@SP的原油吸附量仍然达到8.73 原油/吸附剂，在1.0 kW/m2条件下，原油回收率仍高于90 %。CNTs/PDMS@SP的优越性能不仅使其在原油泄漏和油水分离方面具有广阔的应用前景，而且为回收性能优异的吸附剂的规模化生产铺平了道路，使原油得到充分再利用，节约了大量能源。

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Facile construction of hydrophobic sponge by one-step strategy for the superior adsorption and recovery of leaked crude oil via photothermal conversion mechanism

Crude oil is an important fossil fuel and non-renewable. Pitifully, large amount of crude oil was leaked into the sea. Therefore, it is urgent to develop novel material with superior adsorption and recovery performance for the reutilization of the leaked crude oil. Herein, the modified sponge (CNTs/PDMS@SP) was constructed by using carbon nanotubes (CNTs) and polydimethylsiloxane (PDMS), and a facile one-step method. This sponge presented excellent hydrophobicity with the water contact angle of 142°, a high adsorption capacity for crude oil and several organic solvents, and an outstanding self-cleaning property. Moreover, the CNTs/PDMS@SP boasted excellent oil-water separation performance (up to 98 %). Even after 10 cycles, the separation efficiency still remained as high as 96.6 %. In addition, under illumination, the viscosity of crude oil was rapidly decreased due to the rapid temperature increment of CNTs/PDMS@SP by photothermal conversion, which endowed the modified sponge with the ability of fast adsorption of the crude oil. Under 1.0 kW/m², the surface temperature of the modified sponge reached to ca. 60 °C, and the adsorption amount of crude oil was as high as 13.12 g_{crude oil}/g_adsorbent. The surface temperature of CNTs/PDMS@SP consistently remained above 60 °C after several cycles under 1.0 kW/m², with intermittent light on and off, which proved its brilliant photothermal stability. Excitingly, even after 20 adsorption-extrusion cycles, the crude oil adsorption capacity of CNTs/PDMS@SP still reached to 8.73 g_{crude oil}/g_adsorbent, and the crude oil recovery rate was higher than 90 % under 1.0 kW/m². The superior performance of CNTs/PDMS@SP not only enables it as a promising adsorbent for the applications in crude oil leakage and oil-water separation, but also paves the way for the scale-up production of adsorbent with excellent recovery performance, fully reutilizing the crude oil and saving large amount of energy.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.