CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Jiahui Chen,Yi Zhou,Cailong Zhou,Xiufang Wen,Shouping Xu,Jiang Cheng,Pihui Pi
Quick and on-demand oil/water separation by superwetting materials has attracted wide attention in recent years. Herein, an underoil superhydrophobic and underwater superoleophobic cotton fabric was used for highly efficient and versatile oil/water separation, such as heavy oil/water separation, light oil/water separation, water-in-oil emulsion separation and oil-in-water emulsion separation, and even immiscible organic solvents separation. The fabric was fabricated via a simple two-step approach, including a vapor-liquid sol-gel process to deposit silica with thiols (SiO 2 -SH) particles, and a followed thiol-ene click reaction to graft 2-(dimethylamino) ethyl methacrylate (DMAEMA) and shows an underoil water contact angle (UOWCA) of 162° and an underwater oil contact angle (UWOCA) of 162°. Importantly, the fabric is able to maintain its high UOWCA and UWOCA after 120 h UV irradiation, 1000 g sand impact and after separately immersed in acid, base, neutral and NaCl solution for 168 h as well as various organic solvents for 240 h. The fabric with simple fabrication, excellent durability and versatile separation abilities might has potential application in various liquids separation.
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
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yingbo Li,Jing Ma,Hongjun Lin,Cheng Chen,Saleam Raza,Qianqian Zeng,Xinchun Lu,Liguo Shen
The development of composite membranes utilizing transition metal carbides and nitrides, exemplified by Ti 3 C 2 T x (MXene), has proven efficacious in the treatment of oily wastewater. However, challenges arise from the prolonged and convoluted transport paths within MXene interlayer nanochannels, significantly impeding mass transfer and diminishing membrane permeability. This investigation incorporated porous covalent organic frameworks (COFs) as intercalating agents into two-dimensional (2D) MXene-based membranes to expand the interlayer nanochannels. The resulting MXene@COF-TpBD functional layer polyethersulfone (PES) composite membrane exhibited a distinctive dual superoleophobic surface, concurrently manifesting underwater superoleophobicity and underoil superhydrophobicity (underwater oil contact angle >150°, underoil water contact angle >150°). The membranes exhibited excellent water flux (up to 4092.7 L m −2 h −1 ·bar −1 ), efficient oil-water emulsion separation (up to 1908.4 L m −2 h −1 ·bar −1 , rejection rates >99.78 %), noteworthy fouling resistance and structural stability, outperforming most of existing similar membranes. Furthermore, supported by the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory, the incorporation of COF-TpBD improved the antifouling characteristics of the composite membrane. This work presents innovative insights into the improvement of 2D MXene membranes and the use of COF-TpBD for the specific remediation of oily wastewater.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2024
·Vol. 44
·期 5
·347-353
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IF 1.7
Sida Fu,Haidong Li,Hongtao Liu,Yan Zhao,Zhiguang Xu
In this study, superoleophobic and superhydrophilic fabrics with self-healing property have been prepared by the use of chitosan (CS), sodium tripolyphosphate (TPP), Capstone FS-60 (FS-60), and dopamine hydrochloride as coating materials. The coated fabrics show oil contact angle of 154° for soybean oil, and water droplets can be spread on the surface in 1 s. Notably, it is further demonstrated that the coating has self-healing property. After undergoing home laundering, Martindale abrasion, or acid/base etching, the fabrics lose their superoleophobic and superhydrophilic property, while they can restore the superoleophobic and superhydrophilic property by just being wetted with distilled water and then heated in an oven. Additionally, the coated fabrics prove effective in separating oil/water mixtures. These fabrics, endowed with superoleophobic and superhydrophilic property along with self-healing capability, present innovative features and applications across diverse fields.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Jian Wang,Feiran Li,Yunlu Pan,Fang Chen,Cong Huang,Xuezeng Zhao
Selective superwetting surfaces preserve the opposite superwetting properties of oil and water and have attracted considerable attention for their application in oil-water separation owing to their efficient surface energy since 2000. Among these surfaces, superoleophobic/superhydrophilic surfaces are considered remarkable because of their anti-oil properties. The coexistence of superoleophobicity and superhydrophilicity poses a challenge based on the traditional surface/interface theory. However, the fabrication of superoleophobic surfaces requires extremely low surface energy, which is achieved by introducing compounds with long fluorocarbon chains. However, these compounds are harmful to the environment. Herein, a mesh with superoleophobic/superhydrophilic properties was developed by coating a chemically etched copper mesh substrate with photopolymerized short fluorocarbon chains and water-insoluble hydrophilic monomers. This mesh can separate different types of oil-water mixtures with a separation efficiency of >99 %. The mesh demonstrated excellent underwater stability as well as chemical and mechanical durability. The water resistance and chemical durability of the mesh are stronger than those of the control copper mesh using metal ions and long fluorocarbon chains. Moreover, oil-water separation was achieved even after immersion in deionized water and salt, acid, and alkali solutions. In addition, the mesh preserves the ability of oil-water separation after being cleaned and reused for 10 times. The proposed superoleophobic/superhydrophilic mesh offers a solution for continuous oil-water separation and has prospects for developing anti-fouling/sweat-absorbing fabrics and self-cleaning surfaces.
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
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Feiran Li,Wenting Kong,Xuezeng Zhao,Yunlu Pan
Materials that possess distinguishable superwettability toward oil and water have aroused widespread attention for their application in oil–water separation. Among them, a superoleophobic/superhydrophilic material is considered as the ideal candidate because of its antioil-fouling and water-wetting behavior; however, the fabrication is a challenge and there has been insufficient attention given to multipurpose applications in treating intricate mixtures. Herein, for the first time, a multifunctional superoleophobic/superhydrophilic coating integrated with a photocatalysis property was fabricated by the combination of polarity component-enhanced fluorosurfactant and titanium dioxide (TiO2) nanoparticles. The coating applied on stainless steel mesh preserves the ability to separate immiscible oil–water mixtures, whereas the coated cotton preserves the ability to separate both surfactant-stabilized oil-in-water and water-in-oil emulsions. Notably, benefiting from the photocatalysis property of titanium dioxide, the coating also can be used in liquid purification. Contaminated oil can be separated and purified by a separation–purification process, during which the oil-soluble contamination is degraded under ultraviolet (UV) irradiation. The multipurpose coating provides an alternative solution for oil–water remediations, which has prospects in intricate liquid treatment in industrial and domestic applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Ying Dong,Chuixiu Huang,Xiao-Yu Yang
Intrinsic wettability of atomically thin solids has a great impact on science and technology. Herein, the wetting property of liquid-exfoliated molybdenum disulfide (MoS 2 ) was investigated. The prepared MoS 2 nanosheets can be well dispersed in nonpolar (1,2-dichloroethane and 1-dodecanol) and polar (water-ethanol cosolvent) solvents. Similarly, the MoS 2 -coated fabric shows excellent underwater superoleophobic and underoil superhydrophobic properties. Taking advantage of the unusual intrinsic wettability, few-layered MoS 2 demonstrates the great potential in on-demand oil-water separation.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Zehao Chen,Ting Zhao,Qing Tan,Jihao Zuo,Shouping Xu,Yunjun Nong,Xiufang Wen,Pihui Pi
The crude oil spillage and large-scale industrial release of oily effluents has led to significant ecological degradation and resource wastage. Traditional superwetting materials encounter intractable challenges for treating surfactant-stabilized oil–water emulsions, including trade-off effect of permeation flux and separation efficiency, and low emulsion processing life. These issues considerably impede advancements in oil–water separation industry. In order to enhance the demulsification durability of materials while ensuring high separation efficiency and flux, this work doped perfluorooctanoic acid (PFOA) onto the modified sponge surface with superhydrophilic charged surface, and a unique in-air superhydrophilic-oleophobic sponge was prepared. This special surface allows rapid water phase permeation yet offers remarkably more stable oleophobicity compared with traditional underwater oleophobic materials when processing a large amount of emulsions. The intrinsic oleophobicity endows the sponge outstanding fouling resistance and greatly increases the one-cycle emulsion treatment amount up to 1695 L·m −2 . Moreover, the sponge's inherent long permeation channels and surface charge maintain a high separation efficiency of over 97 %. The large pores of the sponges and superhydrophilic surface provide a high permeation flux exceeding 40,000 L·m −2 ·h −1 . The sponge with high separation efficiency, flux, and capacity marks a significant advancement, offering a promising strategy for superwetting material applications in oil-in-water emulsion separation fields.
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
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Guoxin Zhu,Xiong Zhang,Yan He
Oily wastewater produced from various industries and oil spills has posed serious threats to the environment and human health. Promisingly, superwetting materials emerge as great candidates for efficient oil/water separation. In this work, a superhydrophilic-superoleophobic melamine sponge was prepared using a facile immersion method. Methyltrimethoxysilane (MTMS) was used as a binder, which combined fluorosurfactant (FS-50) and TiO 2 onto the sponge surface. The coated sponge displayed a water contact angle of 0° and an oil contact angle of 154.5°. Accordingly, it exhibited absorption capacities of above 86 g/g for water and under 1 g/g for oils. Based on its selective permeability and 3D porous structures, the coated sponge could continuously separate various immiscible oil/water mixtures and oil-in-water emulsions with separation efficiencies larger than 99.4 % and 98.7 %, respectively. Notably, the superhydrophilic-superoleophobic sponge was extended to present opposite wettability towards polar and nonpolar liquids. Consequently, it achieved continuous separation of immiscible oil/oil mixtures, with separation efficiency over 99.1 %. Additionally, the coated sponge displayed excellent reusability, great mechanical stability against compression and abrasion, and stable separation performance for various harsh oil/water mixtures. The study presented a promising separation candidate for future applications in oily wastewater treatment and other liquid/liquid separation fields.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
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IF 5.9
Yan Liu,Yanhong Wu,Hongchun Chen,Rujing He,Hong Xiao,Chengyi Huang,Xiaojing Wang,Zhenxing Zeng,Jinsong He,Yanzong Zhang
At present, there are few studies on the removal of water from oil, but water in fuel can cause machine malfunctions and even safety accidents, which cannot be ignored. In this study, an oil-resistant superhydrophilic/air superoleophobic sponge (SS-MS) was designed to selectively absorb water from oil. Through layer by layer deposition, polyphenols, particles, and fluorinated surfactants were assembled on the sponge, finally achieving the effect of super hydrophilic and super oil phobic in the air. The contact angle of the modified sponge SS-MS on diesel oil can reach 153°, and the absorption efficiency of water in diesel oil can reach more than 99 %. Moreover, a continuous selective absorption device for water in oil was constructed, the SS-MS sponge can still achieve a water absorption efficiency of 98 % after ten cycles. Importantly, the SS-MS has excellent mechanical and chemical stability under 80 % strain, different pH, UV irradiation times and temperatures. In addition, the materials used in this study are all green and low-pollution substances, and melamine sponge has the advantages of low price, light weight, good elasticity and high porosity. In summary, SS-MS offers a new approach to remove water from fuel and has the potential for large-scale applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qian Xiang,Yan Liu,Bo Wang,Chengyi Huang,Lilin Wang,Jinsong He,Dong Tian,Fei Shen,Yanzong Zhang
To realize efficient treatment of oily wastewater, various super-wetting materials have been developed. Oily wastewater is often complex and may contain both oil-in-water and water-in-oil emulsions. However, most of the current studies focus on the treatment of single emulsions, and there are fewer studies on the simultaneous separation of oil-in-water and water-in-oil emulsions. In this paper, by removing hemicellulose and lignin from bamboo processing waste powder (BPWP), the treated bamboo powder (TBP) containing mainly cellulose was obtained. TBP has superoleophobicity underwater and superhydrophilicity underoil, which can separate not only various oil-in-water emulsions stabilized by surfactants, but also water-in-oil emulsions stabilized by different surfactants, and the separation efficiency is higher than 99 %. The separation efficiencies of TBP for different water-in-oil emulsions were all higher than 99 %. On this basis, we have established an intelligent device that makes full use of underwater super-hydrophobic and under-oil super-hydrophilic properties to realize the purification of water and de-watering and recycling of floating oil in complex oil-water systems. This work provides a very promising direction for industrial application in practical oily wastewater treatment and fuel recovery.
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
Journal of Water Process Engineering
·
2024
·
IF 6.3
Shusu Shen,Qifeng Fan,Honglin Li,Lunbo Xu,Ganwei Zhang,Renbi Bai
Developing a stable MOF-modified membrane for efficient treatment of oily wastewater remains a challenge. In this study, NH 2 -MIL-88B(Fe) (NM88B) was deposited on the commercial polyvinylidene fluoride (PVDF) membranes, and grafted with perfluorohexane-1-sulfonic acid potassium salt (PFHx) to achieve quaternization modification. This reaction proceeds in an environmentally friendly manner due to the absence of any catalyst. The introduction of fluorine atoms through grafting PFHx resulted in the modified PVDF membrane (NPF) demonstrating remarkable underwater superoleophobic property with an underwater oil contact angle at ∼180°. In separation of various oil-water emulsions, the NPF membrane afforded a high permeation flux (up to 2043 L·m −2 ·h −1 ) and rejection rate (∼99 %). The oil rejection of NPF membrane was >99 % after 10 filtration cycles of n -hexadecane-water emulsion, and the pure water flux of the recovered membrane was kept at 82.65 % of the original flux, indicating a very good reusability and stability. Filtration of mixed dye/oil-water emulsions showed that the NPF membrane remove 99 % of both oil and dye from the mixture. This work provides a simple and stable modification of PVDF membrane, exhibiting remarkable underwater superoleophobicity and hydrophilicity , thereby harboring substantial prospects in the treatment of oily wastewater.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Mingji Su,Yong Liu,Shihong Li,Zhengping Fang,Benqiao He,Yuhong Zhang,Yulin Li,Peixin He
Hydrogel has been widely applied in agriculture, oil/water separation, and tissue engineering due to its hydrophily and three-dimensional network structure. But its practical applications are restricted by their non-reversible deformation or poor mechanical property to a great extent. In this study, we prepared a rubber-like, interpenetrating-network poly(acrylamide-co-acrylic acid)/chitosan/methacryloxy propyl trimethoxyl silane modified SiO 2 nanocomposite hydrogel (P(AM-co-AA)/CS/MPS-SiO 2 nanocomposite hydrogel, SIPN-Gels) that exhibit feature underwater superoleophobicity, self-healing and low swelling ratio properties. The nanocomposite hydrogel has hierarchically porous structure and dense spherical papillae structures on its surface, which can improve oil-repellent capability and result in superoleophobicity and self-cleaning property. Besides, synergetic interactions of CS physical networks and MPS-SiO 2 crosslinked P(AM-co-AA) covalent network endows the hydrogel with rubber-like mechanical property (high elasticity, fast self-recovery after large tensile or compression deformation), superior to most of reported underwater superoleophobic hydrogels. To apply this hydrogel for efficient oil/water separation, the obtained underwater superoleophobic hydrogel is further coated on a stainless-steel mesh as separator, we believe that the rubber-like nanocomposite hydrogel will inspire researchers to design flexible and wearable oil-repellent or oil/water separation materials.
研究领域:
材料科学
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环境工程
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）