RSC Advances
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2016
·Vol. 6
·期 91
·88001-88009
·
IF 3.289
Ziai Liu,Xuyue Wang,Mingqian Gao,Jinlong Song,Liu Huang,Jiyu Liu,Xin Liu,Wei Xu,Danyang Zhao
Oil spills seriously pollute the environment and cause huge economic losses. Recently, materials with extreme wettability are widely used for oil/water separation. However, the existing methods have drawbacks including complicated and costly fabrication processes for oil/water separation materials, limited oil collecting capacity and reduced oil/water separation efficiency after being polluted by oil, etc. Therefore, an efficient and low-cost method for oil spill collection is urgently needed. We proposed a one-step immersion method to fabricate an oil spill absorption material. Superhydrophobicity and superoleophilicity were obtained by a common polyurethane sponge after being immersed into a cupric stearate solution and drying process. Water droplets can be supported as a spherical shape with a contact angle above 155.5° and can easily roll off from the surface, while hexane, hexadecane, diesel oil, peanut oil and lubricating oil can spread completely on the modified sponge. The prepared sponge can maintain water repellency after continuous oil spill collection for more than 4 h. A large-scale oil skimmer was designed to collect oil spills by employing the extreme wettability sponge and was successfully used for the collection of floating diesel oil, peanut oil, and lubricating oil on water. This method is simple, low cost and mass-producable, and the obtained oil skimmer possesses a high oil collection capacity, excellent durability and recyclability. Therefore, it has application prospects for the collection of oil spills on the sea or under other harsh conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 31
·48921
·
IF 2.188
Tai Zhang,Changfa Xiao,Jian Zhao,Xiaozhen Liu,Yan Huang,Dawei Ji
In this study, the cost-effective graphite powder (GPd)-coated polyurethane (PGPd-PU) sponge hollow tube (PGPd-PUHT) was prepared for high-efficient continuous oil removal, the hydrophobicity-superoleophilicity PGPd-PU sponge was fabricated through a simple dip-coating method, which dipping PU sponge into GPd dispersion and drying, then coating polydimethylsiloxane (PDMS) on sponge skeleton, as-prepared sponge could selectively absorb a variety of oils up to 34 times of its own weight for dimethyl sulfoxide (DMSO). The PGPd-PUHT was prepared via wrapping PGPd-PU sponge on porous tubular support. The obtained PGPd-PUHT could continuously collect various types of oils from water surface with flux as high as 1.52 kL/m 2 h, and excellent separation efficiency (up to 97.7%) for toluene, as well as remarkable reusability. Moreover, a continuous floating oil collection device based on PGPd-PUHT was designed which showed excellent floating oil collection ability. In addition, our strategy possesses the advantages of low cost, simple preparation, highly efficient, and easily scale-up, showing a great potential for dealing with practical oil spill remediation. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48921.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SN Applied Sciences
·
2021
·Vol. 3
·期 1
·1-8
·
IF 0
Xu Weikang,Zhang Zhentao,Cai Xiaomei,Hong Yazhen,Lin Tianliang,Lei Tingping
Effective treatment of frequent oil spills and endless discharged oily wastewater is crucial for the ecosystem and human health. In the past two decades, the collection of oil from water surface has been widely studied through the simple fabrication of superhydrophobic meshes with various coating materials, but little attention is paid to the design aspects of the meshes based oil-collecting device and practical oil collection. Here, 3D-printing devices with different configurations of (super)hydrophobic meshes, circular truncated cone (CTC), cylinder and inverted CTC, and the same inverted cone-shaped structure (below the meshes for temporary oil storage) are investigated. Results demonstrate that the CTC meshes based device especially for an oblate one not only shows higher stability and discharge of the collected oils than previous reports, but also allows floating oils to enter the (super)hydrophobic mesh faster. We anticipate that future success in developing high-performance (super)hydrophobic meshes and the further optimization of the CTC mesh-based device parameters will make our proposed device more practical for the treatment of real-life oil spills.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
LANGMUIR
·
2021
·
IF 3.882
Xin Yan,Guohua Liu,Jinliang Xu,Xiaojing Ma
Removal of oil from water is strongly desired due to environmental pollution, and related studies are mainly limited to the material itself. Here, we propose an oil–water separation device, called a floating well, which includes a container for oil collection and a modified mesh screen for oil separation. The mesh screen is superhydrophilic to oil and superhydrophobic to water. The oil removal experiment was performed in a basin. Under the calm surface condition, the oil collection efficiency is shown to be 42–69%. The inadequate oil collection is explained by the breakdown of a thin oil film above water to form an oil-free area, preventing direct contact between the separator and the oil. Sustained by a wave generator, we are surprised to find that with a low-frequency surface wave, the oil collection efficiency is increased to 98%, and the collection speed reaches 2.5 times that under the calm surface condition. The almost complete collection is due to the sustained contact between the separator and the oil, under which the surface wave continuously drives the oil film toward the separator from elsewhere, thus the oil-free area cannot be formed. Our work presents a new clue for large-scale in situ applications, in which the nature wave energy of river/sea can be the driving force for continuous oil separation and collection.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2023
·Vol. 31
·期 12
·5261-5271
·
IF 5.3
Li Yuqi,Zhang Hui,Lin Xiaoying,Gong Lingzhu,Shi Ronghui
Water pollution caused by dyeing wastewater discharge, organic chemical reagent leakage and frequent oil spill incidents has aroused widespread international concern. Various methods have been proposed to remove single pollutant from wastewater. However, it is still a challenging task to develop advanced materials that can simultaneously and effectively remove various pollutants from wastewater. In this study, we successfully fabricated a novel multifunctional Pd-decorated alginate/nanofibrillated cellulose (Pd@ALG/NFC) aerogel through a facile and green in-situ reduction, followed by solution-aerogel conversion strategy. The as-prepared Pd@ALG/NFC aerogel exhibited superior catalytic activity toward methylene blue (MB) with a high degradation efficiency above 99% and excellent underwater superoleophobicity with OCA > 150° for various oils. It enabled rapid degradation of MB and efficient separation of different kinds of organic pollutants and oils from water by gravity, with an efficiency exceeding 98.3% and a water flux above 120.5 L·m − 2 ·min − 1 . Moreover, the aerogel is compressible, shape stable and recyclable. These features make the hybrid aerogel a promising candidate for multi-pollutants wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Quan Shen,Yue Jiang,Shanzhu Guo,Lin Huang,Haibo Xie,Long Li
Gradual-transition wettability gradient is a highly promising wettability profile for driving fluid directionally transport across the thickness of porous membranes. However, the fabrication of such membranes is still challenging, limiting their further application in various fields. Here, we report a one-step strategy to fabricate membranes with gradual-transition wettability gradient (GMs) by programmed in-line-blending electrospinning polymers (poly (ε-caprolactone) (PCL) and poly (ε-caprolactone-co-ethylene glycol) (PCE)) with compatible segments but obviously different wettabilities. The results demonstrate that two opposite gradual-transition wettability gradients across the thickness are successfully fabricated in GMs, and resulting GMs exhibit excellent directional liquid transport property that can only allow liquid drops and continuous flow to permeate across the thickness in the direction from the lyophobicity-rich side to the lyophilicity-rich side while blocking the permeation process in the reverse direction. Additionally, no matter under high or low gravity conditions, the directional fluid transport flux of membranes with different wettability profiles improves as the gradient layers increase from 3 to 78, corresponding to the transition of wettability profile from 3-layered Janus wettability to 78-layered gradual-transition wettability. As a result, GMs achieve much faster directional fluid transport fluxes than membranes with abrupt-change wettability gradient (AMs) and homogeneous wettability, owing to the acceleration of internal driving forces originating from the gradual-transition wettability gradient. Based on this particular property, GMs also show great potentials in ultrafast directional floating oil collection and energy-saving directional separation of oil/water mixtures, offering new insight for designing and fabricating wettability-anisotropic porous membranes with potential and versatility in multiple applications.
研究领域:
材料科学
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表面化学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2019
·
IF 3.683
Dan Wang,Gang Zhao,Chunhao Chen,Hui Zhang,Ruomeng Duan,Dafeng Zhang,Mingtong Li,Bin Dong
In this paper, we report a novel multi-responsive walnut-like micromotor consisting of polycaprolactone (PCL), iron oxide nanoparticles (Fe3O4 NPs), and catalase, which is constructed through a one-step electrospinning method. Based on the catalytic activity and photothermal and magnetic responsiveness originating from catalase and Fe3O4 NPs, respectively, the resulting micromotor exhibits an autonomous movement in the presence of hydrogen peroxide (H2O2) fuel, controlled motion velocity under light irradiation, and guided movement direction upon the application of an external magnetic field. Owing to the hydrophobic nature of the PCL polymer constituent inside the micromotor, the autonomous moving micromotor can collect spilled oil inside a solution once it collides with the oil droplet. Since the micromotor could be separated out using a magnetic field, we believe the current walnut-like micromotor holds great promise in the field of environmental remediation.
研究领域:
材料科学
·
纳米技术
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
SN Applied Sciences
·
2020
·Vol. 2
·期 12
·1-12
·
IF 0
Wang Yijing,Jin Ling,Xue Tao,Shao Feifei,Yao Yuan,Li Xinxin
The application of pH-responsive superwetting materials receives increasing attention in oil/water separation. In this work, a mussel inspired robust surface coating fabricated with dopamine, copolymer PDMAEMA- co -PHEMA- co -PHFBMA (PDHH) and SiO 2 nanoparticles (DPS) was formed on stainless steel mesh to perform multiple repeatable oil/water separation. Herein, dopamine was chosen to provide strong adhesion strength and durability, endowing the mesh excellent stability in harsh environments, such as mechanical abrasion, acid/alkali immersion and UV irradiation. In virtue of pH stimulation, the as-prepared mesh can be reversibly switched between superhydrophobicity and superhydrophilicity. Moreover, the mesh possesses remarkable oil/water separation efficiency (SE) (≥98%) and desirable recyclability. An oil collector prepared by the mesh and kapok fiber showed good oil absorption capability in the range of 39.67–79.56 g/g. The facile and inexpensive preparation of the durable separation device enables it promising in actual oil/water separation. Graphic abstract
研究领域:
材料科学
·
环境工程
·
化学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）