COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Chi Jiang,Weiqu Liu,Maiping Yang,Chunhua Liu,Sha He,Yankun Xie,Zhengfang Wang
We present a facile and an inexpensive approach to prepare robust fluorine-free self-cleaning cotton textiles by surface modification with anatase TiO 2 sol and polydimethylsiloxane (PDMS) using a simple dip-coating method. The synergetic effect of the anatase TiO 2 particles and PDMS was critical and essential for obtaining a superhydrophobic coating with photocatalytic activity and UV durability. The coated cotton textiles not merely exhibited desirable superhydrophobic property with a water contact angle (WCA) of 153.8°, but also performed the considerable photocatalytic activity by the decomposition of oil red O under UV exposure. Importantly, the as-obtained self-cleaning cotton textiles were stable under various harsh conditions such as acidic, alkaline, corrosive organic solutions, and laundering. Moreover, the coated cotton textiles could also maintain its superhydrophobicity when exposed to long-term UV irradiation , displaying its excellent UV resistance. Therefore, this simple preparation approach can be regarded as a promising way to construct self-cleaning surfaces for scale up production.
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高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Bin Shang,Min Chen,Limin Wu
The biomimetic fabrication of Nepenthes as a new class of liquid-repellent surface materials has attracted much attention recently, but there still remains big challenges, for example, short-serving life, instability, and so forth. Herein, we develop a novel strategy to fabricate robust slippery liquid-repellent coating by the synthesis and use of silicon oil-contained ultraviolet-responsive microcapsules. Owing to the physical and chemical inertness of silicon oil and the substantial randomly dispersed microcapsules in the coating, this nepenthes-like liquid-repellent coating can not only endure different harsh environments but also have excellent long-term self-healing functions.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2015
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IF 2.587
Ziya Yu,Jun Ni,Linlin Fang,Daxiong Wu,Haitao Zhu
A multilayer three-dimensional (3D) structure made of hydrophobic stainless steel mesh has been designed for in situ continuous oil/water separation. The hydrophobic stainless steel mesh was prepared via a facile and environmental friendly method by etching with FeCl3 solution and coating with n-octadecylthiol. The as-prepared mesh allows oils (gasoline, diesel oil, engine oil) and organic solvents (hexane, liquid paraffin) to pass through and repels water. A separation device equipped with the multilayer 3D structure can continuously separate the aforementioned oils from oil–water mixtures. The separation efficiency of continuous separation is more than 99.0 wt % and shows little decrease after 10 cycles.
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高影响因子
RSC Advances
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2014
·Vol. 4
·期 96
·53514-53519
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IF 3.708
Daxiong Wu,Ziya Yu,Wenjuan Wu,Linlin Fang,Haitao Zhu
A continuous in situ oil–water separation technique for cleanup of oil spills has been designed using surface modified polyurethane (PU) sponges as sorbents. By connecting PU sponges to a vacuum pump, they can continuously separate various kinds of oil and organic pollutant, including engine oil, diesel oil, peanut oil, liquid paraffin and hexane, from the surface of water with negligible water take-up. The sorbents used in the technique were prepared by dip-coating commercial PU sponges with TiO2 sol and n-octadecylthiol successively. After surface modification, the sponges change from hydrophilic to superhydrophobic and superoleophilic surface with the water contact angle measured to be 152°. The as-prepared sponges absorb a broad variety of oils and organic solvents with high oil absorption capacity (80–110 g g−1) and negligible water take-up at both static and dynamic conditions. The success of the continuous in situ oil–water separation technique is based on the excellent oil–water selectivity and oil adsorption capacity of the modified sponges.
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高影响因子
Journal of Materials Chemistry A
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2014
·Vol. 2
·期 26
·10137-10145
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IF 0
Aikifa Raza,Bin Ding,Ghazala Zainab,Mohamed El-Newehy,Salem S. Al-Deyab,Jianyong Yu
Creating a practical and energy-efficient method with high efficacy to separate oil–water mixtures, especially those stabilized by surfactants, has proven to be extremely challenging. To overcome this challenge, a novel and scalable strategy was developed for the synthesis of superhydrophilic and prewetted oleophobic nanofibrous membranes by the facile combination of in situ cross-linked polyethylene glycol diacrylate nanofibers supported on polyacrylonitrile/polyethylene glycol nanofibrous (x-PEGDA@PG NF) membranes. The as-prepared x-PEGDA@PG NF membranes have shown superhydrophilicity with ultralow time of wetting and promising oleophobicity to achieve effective separation for both immiscible oil–water mixtures and oil-in-water microemulsions solely driven by gravity. These new membranes having a good mechanical strength of 14 MPa and mean pore sizes between 1.5 and 2.6 μm have shown a very high flux rate of 10 975 L m−2 h−1 with extremely high separation efficiency (the residual oil content in filtrate is 26 ppm). More importantly, the membranes exhibit high separation capacity, which can separate 10 L of an oil–water mixture continuously without a decline in flux, and excellent antifouling properties for long term use, thus making them important candidates for treating wastewater produced in industry and daily life. Such membranes are also ideal for high viscosity oil purification such as purification of crude oil.
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Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 16
·8772-8781
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IF 7.443
Sha Wang,Xinwen Peng,Linxin Zhong,Jiewen Tan,Shuangshuang Jing,Xuefei Cao,Wei Chen,Chuanfu Liu,Runcang Sun
The fabrication of superabsorbents for oil spillage cleanup is a hot topic today. However, the development of a low cost and highly efficient superabsorbent is still a big challenge. In this paper, we demonstrate a simple method to produce a low-cost, ultralight, elastic, and highly recyclable superabsorbent from renewable cellulose fibers via simple and environmentally friendly microfibrillation treatment and freeze-drying. Since microfibrillation of cellulose fibers resulted in hierarchical fibers that possess both fiber bulk and considerable microfibrils on the fiber surface, hierarchically porous sponges with ultralow density (0.0024 g cm−3) and high porosity (up to 99.84%) were obtained after freeze drying. The porous sponges after hydrophobic modification were elastic and exhibited rapid and outstanding absorption performances for various oils and organic solvents. The hydrophobic superabsorbent could selectively absorb oil from an oil–water mixture and showed an ultra-high absorption capacity of 88–228 g g−1, which is comparable to those of other novel carbon-based superabsorbents. More importantly, the superabsorbent showed excellent flexibility and elasticity, and could be repeatedly squeezed without structure failure (more than 30 times). The absorbed oil could be readily and rapidly recovered by means of simple mechanical squeezing, while the superabsorbent could be reused at once without any other treatment. The superabsorbent showed excellent recyclability and could be reused for at least 30 cycles while still maintaining high oil absorption capacity (137 g g−1 for pump oil). These advantages make the superabsorbent an ideal alternative for oil spillage cleaning.
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高影响因子
ACS Applied Materials & Interfaces
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2014
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IF 5.9
Xiaojuan Liu,Lei Ge,Wei Li,Xiuzhong Wang,Feng Li
The removal of oil and organic pollutants from water is highly desired due to frequent oil spill accidents, as well as the increase of industrial oily wastewater. Here, superhydrophobic and superoleophilic textile has been successfully prepared for the application of effective oil/water separation and selective oil adsorption. This textile was fabricated by functionalizing the commercial textile with layered double hydroxide (LDH) microcrystals and low surface energy molecules. The LDH microcrystals were immobilized on the microfibers of the textile through an in situ growth method, and they formed a nestlike microstructure. The combination of the hierarchical structure and the low surface energy molecules made the textile superhydrophobic and superoleophilic. Further experiments demonstrated that the as-prepared textile not only can be applied as effective membrane materials for the separation of oil and water mixtures with high separation efficiency (>97%), but also can be used as a bag for the selective oil adsorption from water. Thus, such superhydrophobic and superoleophilic textile is a very promising material for the application of oil spill cleanup and industrial oily wastewater treatment.
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高影响因子
CARBOHYDRATE POLYMERS
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2015
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IF 4.074
Xiangyun Wang,Shimei Xu,Yun Tan,Juan Du,Jide Wang
Oily wastewater is generated in diverse industrial processes, and its treatment has become crucial due to increasing environmental concerns. Herein, silanized cellulose was prepared by sol–gel reaction between microcrystalline cellulose (MCC) and hexadecyltrimethoxysilane (HDTMS) using for oil–water separation. The silanized cellulose was characterized by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). A higher mass ratio of HDTMS to MCC made silanized cellulose become looser, and showed lower water absorbency. The silanized cellulose exhibited specific separation performance towards vegetable oil–water mixture (not for mineral oil–water mixture) with separation efficiency of 99.93%. Moreover, the separation was fast with a water flux of 4628.5 L m −2 h −1 . The separation efficiency still remained at 99.77% even after recycling for 10 times.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Qiang Wang,Lei Yang,Bing Dai,Jie Bai,Zhenhuai Yang,Shuai Guo,Yurong He,Jiecai Han,Jiaqi Zhu
Forests of vertically aligned carbonaceous microcones are fabricated directly on a nickel mesh by microwave-plasma-assisted chemical vapor deposition. The microstructure is formed through a simple one-step process involving self-assembly. The fabricated composite exhibits superhydrophobicity and superoleophilicity as well as low density, owing to which it floats on water and can be used for the in-situ separation of oil from water at the oil/water interface. Furthermore, the composite exhibits pH responsivity, and its water permeability can be varied simply by altering the pH of the aqueous solution. In addition, the composite is suitable for use as an electrode material for supercapacitors owing to its large geometric surface area, porous structure, and superior electrical properties, which allow for fast ion and electron transportation. Thus, this composite consisting of forests of vertically aligned carbonaceous microcones on a nickel mesh is expected to find use in a wide range of fields and applications, including in environmental cleanup, flow switches, and energy storage devices.
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高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Hongqiang Li,Tao Liang,Xuejun Lai,Xiaojing Su,Lin Zhang,Xingrong Zeng
With oil spill accidents and oil industrial wastewater increasing, oil/water separation has attracted much attention in recent years. Herein, we report the fabrication of superhydrophilic and underwater superoleophobic thiol-ene/silica hybrid decorated fabrics for oil/water separation via vapor-liquid interfacial reaction. It is based on sol-gel reaction of tetraethyl orthosilicate (TEOS) to generate silica and thiol-ene reaction between poly(ethylene glycol) dimethacrylate (PEGDMA) and trimethylolpropane tris(3-mercaptopropionate) (TTMP) to form crosslinked hydrophilic polymer on polyester fabric under the catalysis of butylamine/ammonia vapor. The chemical structure of the surfaces on thiol-ene/silica hybrid decorated fabric was confirmed by FTIR and XPS, and obvious micro-nano morphology and roughness were observed with SEM and AFM. The water contact angle of the fabric attained 0° in 0.36 s, and the underwater oil contact angle reached up to 160°. Importantly, the fabric exhibited high separation efficiency at 99.5%, fast water flux above 71600 Lm −2 h −1 and excellent recyclability in oil/water separation. Our findings open a new strategy to fabricate organic-inorganic hybrid superhydrophobic and underwater superoleophobic materials for oil/water separation.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2017
·Vol. 27
·期 48
·1704293
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IF 12.124
Weiyang Lv,Qingqing Mei,Jianliang Xiao,Miao Du,Qiang Zheng
Developing novel filtering materials with both high permeation flux and rejection rate presents an enticing prospect for oil/water separation. In this paper, robust porous poly(melamine formaldehyde) (PMF) sponges with superwettability and controlled pore sizes through introducing layered double hydroxides (LDH) and SiO 2 electrospun nanofibers are reported. The LDH nanoscrolls endow the sponge with inherent superhydrophilicity and the SiO 2 nanofibers act as pore size regulators by overlapping the PMF mainframe. This approach allows the intrinsic large pores in the pristine sponge to decrease quickly from 109.50 to 23.35 µm, while maintaining porosity above 97.8%. The resulting modified sponges with varied pore sizes can effectively separate a wide range of oil/water mixtures, including the surfactant-stabilized emulsions, solely by gravity, with ultrahigh permeation flux (maximum of 3 × 10 5 L m −2 h −1 bar −1 ) and satisfactory oil rejection (above 99.46%). Moreover, separation of emulsions stabilized by different surfactants, such as anionic, nonionic, and cationic surfactants has been investigated for further practical evaluation. It is expected that such a pore size tuning technology can provide a low cost and easily scaled-up method to construct a series of filtering materials for high-efficient separation of target oil/water mixtures.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Kun Hou,Yicheng Zeng,Cailong Zhou,Jiahui Chen,Xiufang Wen,Shouping Xu,Jiang Cheng,Pihui Pi
Robust polyhedral oligomeric silsesquioxane (POSS)-based superhydrophobic fabrics were successfully generated by surface modification of fibers with mercapto silanes followed by click coupling with methacryl-heptaisobutyl POSS (MAPOSS). MAPOSS grafted onto the fabric surfaces not only increased the surface roughness but also lowered the surface energy of fabric, resulting in superhydrophobicity with a water contact angle of 159° and a sliding angle of 7°. Importantly, the as-prepared superhydrophobic cotton fabric is tolerant to corrosive liquids, UV irradiation, high temperature environment , ultrasonic washing and mechanical abrasion. And the as-prepared superhydrophobic fabric could be used as an adsorbent material for removing oil from water. In addition, MAPOSS could be easily grafted onto other porous substrates (including but not limited to polyester fabrics, filter papers and melamine sponges) to endow these materials with high hydrophobicity . Therefore, this facile, environmentally friendly, low cost and versatile method offers great technological promise in the preparation of robust superhydrophobic coatings on a large scale.
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高影响因子
危险品化学品经营许可证（带存储）