Preparation and properties of photothermal superhydrophobic melamine sponge for heavy oil absorption

IF 7.4 2区 工程技术 Q1 ENGINEERING, CHEMICAL
Luyao Wei , Tao Wu , Yujiang Li
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Abstract

Frequent oil spills lead to significant environmental issues and economic losses. In this work, a photothermal superhydrophobic melamine sponge (OPCM) was prepared with carbon black, polydopamine and octadecylamine for absorbing heavy oil. The surface properties, morphology and structure of OPCM were characterized by various characteristic techniques, including interfacial tensiometer, infrared thermography, SEM, FT-IR and XPS. Experimental results showed that the water contact angle of OPCM increased from 0° to 152.6°, signifying a change in wettability from superhydrophilicity to superhydrophobicity. And the surface temperature of OPCM rose rapidly from 25°C to 76.2°C within 1 min under the simulated sunlight irradiation of 1.0 kW/m2. Furthermore, three kinds of heavy oils with viscosities of 44204 mPa·s, 9373 mPa·s, and 3671 mPa·s were selected for the absorption test. The test indicated that the maximum absorption capacities of OPCM for these oils were 126 g oil/g OPCM, 117 g oil/g OPCM, and 114 g oil/g OPCM, respectively. At the same time, from the perspective of circular economy, after 11 cycles of oil absorption, the absorption capacities of OPCM remained at 107 g oil/g OPCM, 102 g oil/g OPCM, and 100 g oil/g OPCM. Because of the photothermal conversion property and thermal conductivity of OPCM, the viscosity of heavy oil decreased and the fluidity increased. Additionally, the capillary force and hydrophobic interaction improved the absorption efficiency of OPCM for heavy oil. The sponges OPCM are potentially useful for in addressing oil spills and environmental issues during crude oil production and transportation.
频繁的石油泄漏导致了严重的环境问题和经济损失。本研究利用碳黑、聚多巴胺和十八胺制备了一种光热超疏水三聚氰胺海绵(OPCM),用于吸收重油。采用界面张力仪、红外热成像、扫描电镜、傅立叶变换红外光谱和 XPS 等多种特征技术对 OPCM 的表面性质、形貌和结构进行了表征。实验结果表明,OPCM 的水接触角从 0°增加到 152.6°,表明其润湿性从超亲水变为超疏水。在 1.0 kW/m2 的模拟阳光照射下,OPCM 的表面温度在 1 分钟内从 25°C 迅速升至 76.2°C。此外,还选择了粘度分别为 44204 mPa-s、9373 mPa-s 和 3671 mPa-s 的三种重油进行吸收试验。试验结果表明,OPCM 对这些油的最大吸收能力分别为 126 克油/克 OPCM、117 克油/克 OPCM 和 114 克油/克 OPCM。同时,从循环经济的角度来看,经过 11 次吸油循环后,OPCM 的吸收能力仍保持在 107 克油/克 OPCM、102 克油/克 OPCM 和 100 克油/克 OPCM。由于 OPCM 的光热转换特性和导热性,重油的粘度降低,流动性增加。此外,毛细管力和疏水相互作用提高了 OPCM 对重油的吸收效率。海绵 OPCM 有助于解决原油生产和运输过程中的石油泄漏和环境问题。
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来源期刊
Journal of Environmental Chemical Engineering
Journal of Environmental Chemical Engineering Environmental Science-Pollution
CiteScore
11.40
自引率
6.50%
发文量
2017
审稿时长
27 days
期刊介绍: The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.
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