RSC Advances
·
2016
·Vol. 6
·期 29
·24773-24779
·
IF 3.289
Liuhua Yu,Gazi Hao,Shuai Zhou,Wei Jiang
With the continuous exploitation and utilization of oil resources, oil pollution has become increasingly serious, which not only causes economic loss, but also damages the living environment of human beings. Herein, oleic acid coated Fe3O4 particles and PS microspheres were introduced to the surface of pure foam through an inexpensive two-step immersion method; we obtained a durable and modified magnetic polystyrene foam (DMMPF) with high efficiency and selectivity. The as-obtained DMMPF exhibited superhydrophobicity, superoleophilicity, and fast magnetic response via the surface chemical modification. In addition, the as-prepared DMMPF could be used for continuous separation of various oils and organic solvents from the water surface. The absorption intake capacity of DMMPF was 40.1 times its own weight and the absorbed oils/organic solvents could be collected by simple mechanical extrusion. Furthermore, the as-prepared DMMPF retained an excellent absorption capacity and a large water contact angle after 60 separation cycles. It is recognized that DMMPF could be suitable for large-scale oil spill processing.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Hong Shi,Tiantian Wang,Long Zhao,Weihua Zhu
ABSTRACT With the aggravation of environmental pollution caused by oil and chemical leakages, oil-water separation has attracted great attention from both academia and industry. In this paper, a costeffective dip-coating and thermal treatment method based on the modification of nylon mesh has been developed for oil-water separation. Ultra-low surface energy polybenzoxazine and hydrophobic silica nanoparticles were adopted to engineer nylon mesh superhydrophobic-superoleophilic. The morphology, chemical composition and surface properties of the modified nylon mesh were characterized by using scanning electron microscopy, Fourier-transform infrared spectroscopy and contact angle (CA) measurements, etc. The modified nylon mesh exhibited excellent superhydrophobic property with a high water contact angle of 154.3° and distinct superoleophilic feature with a negligible oil CA of nearly 0°, leading to more than 99.5% ± 0.1% of oil-water separation efficiency with high permeate flux (up to 1.77 × 10 4 ± 100 L/(m 2 h)) merely under gravity. In addition, the novel nylon mesh displayed excellent reusability after more than 30-cycle measurements. Our findings may provide a promising approach to the treatment of oil spills and oily wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2016
·
IF 3.993
Botao Song,Qing Xu
Both the wettability and pore size of filtration materials are of great importance in oil/water separation. However, conventional strategies have mainly focused on the fabrication of filtration materials with special wettability, regardless of the pore size. Herein, we demonstrated the design and construction of special wettable nanofibrous mats with tunable pore sizes as filtration materials for selective and efficient separation of oil from oil/water mixtures. The nanofibrous mats with different pore sizes were prepared by the electrospinning approach using a stainless steel wire mesh as the collector, and the results indicated that the pore size of the nanofibrous mats gradually increased with the decrease in the mesh number. The results of the wettability behavior demonstrated that all of the nanofibrous mats showed highly hydrophobic and superoleophilic properties. Owing to the special wettability and the porous structure, the nanofibrous mats were sequentially applied for oil/water separation, and they showed excellent ability to separate both layered oil/water mixture and water-in-oil emulsion; moreover, it was also found that the oil flux could be highly improved by controlling the pore size of the nanofibrous mat and that the oil flux of the nanofibrous mat with the largest pore size was about 10 times higher than that of the conventional nonwoven mat that had the smallest pore size. The nanofibrous mats developed with controllable pore sizes can therefore be practically used as highly efficient filtration materials in the management of oily water.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Lei Tang,Gang Wang,Zhixiang Zeng,Luli Shen,Lijing Zhu,Yingxin Zhang,Qunji Xue
With the development of research on superwettability materials, superhydrophobic and superoleophilic materials show superior separation ability in oil-water separation due to their excellent oil-water selectivity. However, due to the super wetting ability of the oil to the material, it is difficult to clean and reuse after adsorbing the oil spill. Therefore, how to realize the complete regeneration of superhydrophobic and superoleophilic materials is still a worldwide problem. In this paper, the controlled adsorption-desorption process of oil and the complete regeneration of materials are realized by pH induced superwettability transformation. We fabricate a pH-responsive oil-water separation sponge by a method of simply impregnating the carboxyl and alkyl group modified SiO 2 nanoparticles on the surface of melamine sponge (MS) skeleton, which can change the wettability from superhydrophobicity and superhydrophilicity through protonation and deprotonation in different pH solutions. The experiment results indicate that the sponge is superhydrophobic and superoleophilic in acid and neutral solution, and can adsorb oil in water. While in basic solution, it becomes superhydrophilic and underwater superoleophobic, which can release the adsorbed oil. With the help of a vacuum pump, we can use this wettability transition to achieve a continuous oil adsorption and desorption process. These findings offer a new preparation method of regenerative 3D adsorption materials like MS in oil-water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2018
·Vol. 26
·期 3
·2055-2074
·
IF 3.809
Li Hui,Wang Xin,He Yunqing,Peng Lincai
Abstract Oil/water separation is highly desired due to increasing industrial oily wastewater and frequent oil spill accidents. Here, superhydrophobic/superoleophilic paper was successfully fabricated by the combination of layer-by-layer (LBL) deposition of chitosan (CS) and hexadecyltrimethoxysilane (HMTS)- g -TiO 2 on paper surface and subsequent heat treatment. The formation of CS/HTMS- g -TiO 2 multilayers on modified papers was characterized. The wettability and physical strength of the modified papers were also examined. The paper modified with (CS/HTMS- g -TiO 2 ) 20 multilayers followed by heat treatment showed superhydrophobicity with a water contact angle of 167.4° and superoleophilicity with an oil contact angle of 0°. This paper had comparable tensile strength to that of original paper and excellent self-cleaning performance. The as-prepared paper could also effectively separate both immiscible oil–water mixtures and water-in-oil emulsions solely driven by gravity. The obtained paper exhibited stable recyclability, high environmental and mechanical durability. Therefore, this LBL-modified paper could be useful for oil spill cleanup and industrial oily wastewater treatment. Graphical abstract
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jincui Gu,Peng Xiao,Peng Chen,Lei Zhang,Hanlin Wang,Liwei Dai,Liping Song,Youju Huang,Jiawei Zhang,Tao Chen
Although the construction of superwettability materials for oil/water separation has been developed rapidly, the postprocess of the used separation materials themselves is still a thorny problem due to their nondegradation in the natural environment. In this work, we reported the functionalization of polylactic acid (PLA) nonwoven fabric as superoleophilic and superhydrophobic material for efficient treatment of oily wastewater with eco-friendly post-treatment due to the well-known biodegradable nature of PLA matrix.
研究领域:
材料科学
·
环境科学
·
生物降解材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2017
·Vol. 9
·期 11
·563
·
IF 3.364
Feiran Li,Ziran Wang,Yunlu Pan,Xuezeng Zhao
Superhydrophobic/superoleophilic surfaces (water contact angle greater than 150° with low hysteresis, with an oil contact angle smaller than 5°) have a wide-range of applications in oil/water separation. However, most of the essential methods to fabricate this kind of surface are complex, inflexible, and costly. Moreover, most methods focus on separating immiscible oil and water mixtures but lack the ability to demulsify surfactant-stabilized emulsions, which is widely present in industry and daily life. In this study, a facile and effective method was developed to fabricate superhydrophobic/superoleophilic surfaces that can be easily applied on almost all kinds of solid substrates. The treated porous substrates (e.g., steel mesh; cotton) can separate oil/water mixtures or absorb oil from a mixture. Furthermore, the compressed treated cotton is capable of demulsifying stabilized water-in-oil emulsions with high efficiency. The simple, low-cost, and material-unrestricted method provides an efficient way to separate oil/water mixtures of various kinds and has great potential in energy conservation and environmental protection.Keywords:superhydrophobic;superoleophilic;oil/water separation;stabilized water-in-oil emulsion
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhibiao Chen,Bin Zhan,Shuyi Li,Dongsong Wei,Wenting Zhou,Yan Liu
Owing to the excellent adsorption capacity and high selectivity, aerogel have attracted considerable attention recently as promising sorbent materials for oil–water separation. Although many preparation methods for aerogel have been reported, green, facile, and low-cost fabrication is still a challenge. Herein, we reported the preparation of superhydrophobic and superoleophilic aerogel for oil and organic solvents collection from water. The crushed corn stover was treated with sodium hydroxide and hypochlorous acid to obtain the biomass cellulose fibers. The aerogels were produced using polyvinyl alcohol binder, followed by a freeze-drying method. It showed high porosity (98.26–99.01%) and low density (15.15–24.95 mg/cm 3 ). After modified with hexadecyltrimethoxysilane by chemical vapor deposition, the aerogel exhibited superior superhydrophobicity and showed excellent adsorption capacity (75 g/g). The adsorbed oil and organic solvents can be recovered by extrusion or centrifugation, and the aerogel showed stable performance and excellent reusability. Besides, the aerogel can separate various water-in-oil emulsions with separation efficiencies up to 99.94% and flux as high as 5529 L•m −2 •h −1 . Taken together, the results illustrate that the aerogel hold promise for the fields of oil recovery and environmental protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Open Physics
·
2021
·Vol. 19
·期 1
·486-493
·
IF 1.067
Ting Liang,Biao Wang,Zhenzhong Fan,Qingwang Liu
A facile method for fabricating superhydrophobic and superoleophilic powder with 5A zeolite and stearic acid (SA) is reported in this study. The effect of different contents of SA on contact angle (CA) was investigated. The maximum water CA was 156.2°, corresponding to the optimum SA content of 1.5 wt%. The effects of SA and the mechanism of modified 5A zeolite powder by SA were analyzed by sedimentation analysis experiment, FTIR analysis, particle size analysis, and SEM characterization. The SA-modified 5A zeolite was used as an oil sorbent to separate oil–water mixture with potential use in floating oil. The separation efficiency was above 98%.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ning Yang,Renqiang Yuan,Weikun Li,Xin Tan,Zonghao Liu,Qianli Zhang,Chunyang Li,Liqin Ge
Spills of marine oily pollutants and illegal discharges of industrial organic solvents have severely undermined the natural resources and ecological sustainability. Herein, a versatile and durable modified melamine sponge (MS) was fabricated by integrating with multilayered microcapsules (MCs) and chemical vapor deposition of 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES), namely PFDTES@MCs@MS. The combination of giant microcapsules on the sponge structure imparts the rough surface micro-construction, accompanied by the hydrophobic modification, which enabled PFDTES@MCs@MS to exhibit superhydrophobic/super-oleophilic and self-cleaning capabilities. PFDTES@MCs@MS displayed outstanding oil–water mixtures or emulsions separation capabilities with the separation efficiencies more than 99%. Impressively, PFDTES@MCs@MS preserved mechanical and chemical durability in 100 recycle tests or chronic processes under harsh conditions. In addition, PFDTES@MCs@MS exhibited the remarkable uptake capacity of organic solvents or oils, and the adsorption amount of light or heavy oil was barely impacted with squeezing after the 50 times of circulation. Furthermore, the PFDTES@MCs@MS displayed antibacterial performance. Significantly, the PFDTES@MCs@MS showed superior photothermal conversion capability, the temperature of it increased dramatically to approximately 80 °C within 180 s under simulated sunlight from room temperature (about 25 ℃), and the flux of separating high-viscosity oils was significantly increased. This study presents a novel oil sorption and separation materials with excellent durability and repeatability, which establishes the foundation for the judicious design of innovative weapons to combat the challenging oil spills.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2021
·
IF 3.739
Chengwei Xu,Yan Yu,Xiaodong Si
The surface wettability of fibers in coalescing filter has a critical effect on filter’s performance. In this study, we employed common glass fiber filters as model and prepared superoleophilic and superoleophobic surface filters via a facile dip-coating method. The superoleophilic treatment shows a considerable reduction in pressure drop. The wet pressure drop at saturation decrease from 12.91 kPa to 8.56 kPa after superoleophilic coating. The filtration efficiency of fine particles (<100 nm) increase owing to coating treatment. The combinations of superoleophilic and superoleophobic filter and drainage strategy were also evaluated. The results show that the combination has no advantage due to emergency turn of wettability. The drainage layer with appropriate rank could enhance the drainage rate at unsaturation stage. However, the drainage strategy is never a good idea to improving coalescence performance because it brings the extra pressure drop.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2017
·Vol. 18
·期 12
·2307-2314
·
IF 1.113
Liang Liping,Su Mengyao,Zheng Cong,Li Jiaqi,Zhan Haihua,Li Xuming,Meng Xu
A straightforward approach was proposed to modify cotton fabric for oil/water separation based on musselinspired reaction. The poly(DMA-Octadecyl acrylate) was designed to contain key chemical constituents present in mussel adhesive proteins by free radical polymerization of dopamine hydrochloride and octadecyl acrylate, which strongly adsorbed to fabric substrates, providing a special surface for fabric. The chemical structure, surface topography, and surface wettability of the fabric were characterized. The results showed that as-prepared cotton fabric displayed a high CA of >150° when dripped water droplets were on the modified fabric surface, and the oil contact angle (OCA) was close to 0°, it had excellent potential to be used in practical applications and has created a new method of fabric modification for oil/water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）