ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wenjing Ma,Yuansheng Li,Mengjie Zhang,Shuting Gao,Jiaxin Cui,Chaobo Huang,Guodong Fu
Wastewater pollution has always been one of the most severe worldwide environmental problems. In addition, in light of the frequent oil spills that have occurred in recent years, the treatment of oily wastewater is particularly important. In this work, a novel zeolitic imidazolate framework-8@thiolated graphene (ZIF-8@GSH) composites-based polyimide (PI) nanofibrous membrane was developed via a facile electrospinning and in situ hydrothermal synthesis approaches for effective purification of oily wastewater. The membrane showed superhydrophobicity/superoleophilicity and high separation efficiency (>99.9%) for a wide range of oil/water mixtures and water-in-oil emulsions. Besides, the membrane demonstrated excellent photocatalytic dye degradation, antibacterial, self-cleaning, and mechanochemical durable abilities, showing high potential in oily wastewater treatment and water remediation.
✓ 已验证
产品关联
DOI
PubMed
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.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qingtao Zeng,Piming Ma,Xiaojing Su,Dehui Lai,Xuejun Lai,Xingrong Zeng,Hongqiang Li
The fabrication of an eco-friendly superhydrophobic material for oil–water separation is of important theoretical and practical significance. Herein, we proposed a facile method to fabricate a superhydrophobic and magnetic poly(lactic acid) (SMPLA) nonwoven fabric. First, polydopamine (PDA) was formed by polymerization of dopamine on the fabric surface to provide strong adhesion force, and then, in situ generated iron oxide (Fe3O4) particles were immobilized on the PDA layer to construct surface roughness and endow the fabric with magnetic property. Finally, the fabric was further coated with poly (vinylidene fluoride-co-hexafluoropropylene) to decrease the surface energy. The obtained SMPLA nonwoven fabric exhibited superhydrophobicity with a water contact angle of 151.7° and possessed strong resistances to organic solvents, acids, alkalis, and boiling water, as well as abrasion. Owing to the excellent water repellency, the fabric also demonstrated good self-cleaning capability. In addition, the fabric was able to absorb organic solvents high up to 36 times of its own weight, and the oil–water separation efficiency reached up to 99.5%. Moreover, the fabric was also driven by a magnet to separate the oil floating at the specified area on water surface. Our method is facile, cost-effective, and scalable, and the superhydrophobic and magnetic fabric with degradable PLA as a substrate is highly promising to be applied in the treatment of practical oil pollution.
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 12
·3699-3711
·
IF 7.704
Wenjing Ma,Mengjie Zhang,Yuansheng Li,Mengmeng Kang,Chaobo Huang,Guodong Fu
One of the most pervasive environmental issues is water contaminated with various oils. Developing an efficient and novel functional membrane for oil/water separation is urgently needed. Herein, a flexible, durable and magnetic pH-responsive F3O4/MA–TiO2/PI electrospun nanofibrous membrane (ENM) was fabricated via an electrospinning and green dip-coating route. Combining the rough hierarchical structure and pH-responsive wettability, the as-prepared hybrid membrane can controllably separate a range of not only heavy oil/water but also light oil/water mixtures by only adjusting the pH of the aqueous medium. Both separations exhibit a large flux and outstanding efficiency for the tested oil/water mixtures even after 20 reuse cycles due to the hierarchical structure and flexibility of the membrane. In addition, the flexibility and magnetism of the membrane make it easily removed with a magnet after the separation of the oil/water mixtures. More importantly, the as-prepared membrane not only has excellent stability towards high temperature, corrosive organic solvent/salt solution immersion, and UV irradiation but also shows great resistance to mechanical abrasion and ultrasonic treatment, and the preparation method is facile, environmentally friendly, and cost-effective. Thus, such a membrane may offer exciting opportunities in the application of oily wastewater treatment and on-demand oil/water separation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Ting Ying,Jiafei Su,Yijing Jiang,Qinfei Ke,He Xu
In this work, a pre-wetting induced superhydrophilic/superlipophilic micro-patterned membrane with surface-loaded BiVO 4 nanoparticles (Bi/PDA@PT) was successfully prepared by electrospinning and polydopamine (PDA) surface modification technology for highly efficient emulsified oily wastewater separation. The results showed that the as-prepared membranes exhibited micro hole-patterned structures and the BiVO 4 nanoparticles were uniformly deposited on the surfaces of fibers to construct hierarchical porous structures by using PDA as an adhesive polymeric bridge. During the separation process of emulsified oily wastewater, the hierarchical porous structures in membranes significantly improved the separation flux, which was nearly 2–3 times than that of the non-patterned membranes. Based on the existence of PDA, the membranes exhibited prewetting-induced superoleophobicity under water and superhydrophobicity under oil, which made it possible for them to separate both water-in-oil and oil-in-water emulsified oily wastewater selectively and efficiently. Moreover, the BiVO 4 nanoparticles loaded on the membranes could degrade the oily contaminants adsorbed on the membranes (nearly 100%) under visible light. All these attractive features demonstrate that the Bi/PDA@PT membranes show a great potential for sustainable and efficient emulsified oily wastewater separation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 5
·2847-2857
·
IF 4.21
Yang Maiping,Liu Weiqu,Liang Liyan,Jiang Chi,Liu Chunhua,Xie Yankun,Shi Hongyi,Zhang Fengyuan,Pi Ke
Abstract In this work, we proposed a mild and fluorine-free strategy for fabricating robust superhydrophobic coatings with TiO 2 , 3-mercaptopropyltriethoxysilane (MPTS) and polyhedral oligomeric silsesquioxanes using dip-coating and thiol-ene click reaction. The modified cotton exhibited superb superhydrophobicity with a WCA of 157.6°, which showed anti-wetting property in both water and air. Moreover, the durability of the treated cotton against acid and alkaline solutions, different temperatures, abrasion and peeling tests was verified. The highlight is the dual self-cleaning afforded by superhydrophobicity and photocatalytic degradation. The oil red O was adopted as organic pollutant model and could be decomposed completely with the aid of resultant coating after UV irradiation for 3 h. In addition, the modified cotton could be used as filter material and has the potential in the application of oil–water separation. After seven separation cycles, the separation efficiency still maintained 99.0%, while the WCA of cotton kept as high as 154.6°. Therefore, the above-mentioned features demonstrated that this fluorine-free method could reduce the usage of long-chain fluorinated polymers and prepare superhydrophobic cotton which could be applied in self-cleaning as well as oil–water separation fields. Graphic abstract
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2019
·Vol. 15
·期 47
·9727-9732
·
IF 3.399
Guanzhou Luo,Li Wang,Xinying Li,Kai Yang,Yongle Luo,Shouping Xu,Pihui Pi,Xiufang Wen
A facile method that combines alkali-assisted oxidation and –SH chelation with a click chemistry reaction was employed to create an F-POSS polymer surface (fluorinated octavinyl polyhedral oligomeric silsesquioxane polymer)-based Cu mesh (F-POSS-OM). The as-prepared F-POSS-OM surface displayed a cohering hierarchical nano-F-POSS polymer granule/micro-Cu(OH)2 wire structure, which provided a re-entrant geometry needed for liquid-repellency and low liquid sliding angles (<15°). Moreover, the easy-prepared structure endows the F-POSS-OM with remarkable durability for mechanical and chemical damages, including wear abrasion, tape-peeling, 100 cm-height hammer impact, severe hand twisting, strong acid/base/salt solutions, and high temperatures. Importantly, F-POSS-OM still retained excellent self-cleaning performance even after being subjected to these damages.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Dandan Zhao,Mingwang Pan,Jinfeng Yuan,Hui Liu,Shaofeng Song,Lei Zhu
s Although recent progress has been made in the development of superamphiphobic fabrics, durability has been an obstacle to their wide application in practice. In this work, a robust water-borne superamphiphobic coating was successfully prepared using poly(vinylidene fluoride) (PVDF) latex particles (225 nm) modified with a cationic fluorocarbon surfactant (Zonyl 321) and an fluoroalkylsilane (FAS). It is demonstrated that the superamphiphobic coating could strongly adhere to various substrates (fabric, sponge, wood, and filter paper) to efficiently repel water and hexadecane under harsh environments such as strong ultraviolet (UV) irradiation, abrasion, plasma cleaning, boiling water, and strong acid/base corrosion. Furthermore, this coating could exhibit good thermal healing capability upon thermal annealing. Through a thorough study of the self-assembly structure of the composite PVDF/Zonyl 321/FAS particles, the robust superamphiphobic property was considered to relate to the following reasons. First, PVDF latex particles provided nanoscale roughness and good UV/chemical resistance. Second, cationic Zonyl 321 self-assembled onto negatively charged PVDF latex particles to form a shell structure with inner fluoroalkyl groups protected by the outer positive charges, which could provide strong adhesion to various fabrics. Third, FAS self-assembled into the fluoroalkyl shell and subsequent self-condensed to render a lightly crosslinked structure. After forming a dense coating onto a substrate, further crosslinking via self-condensation of FAS provided robustness for the coating. Subsequent thermal annealing at 130 °C drove the fluoroalkyl side chains to accumulate at the top surface for superamphiphobicity. This understanding of the composite PVDF/Zonyl 321/FAS system will help us design even better superamphiphobic coatings in the future.
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2019
·
IF 3.192
Yali He,Menghui Wan,Zhihua Wang,Xia Zhang,Yanbao Zhao,Lei Sun
A simple and mild low-cost method for fabricating fluoride-free super-hydrophobic cotton fabrics is presented. The two-step method involves the decoration of the cotton fabrics by ZnO nano-rods to construct rough surface and the grafting of low surface energy stearic acid (SA) onto the as-decorated cotton fabrics via an immersion route. The as-prepared ZnO/SA modified cotton fabrics were characterized by X-ray powder diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy and Fourier transform infrared spectroscopy . The wetting behavior of coffee, milk, tea, water dyed by methylene blue, strong acid (HCl), strong alkali (NaOH), and saturated salt solution (NaCl) on the ZnO/SA modified cotton fabrics was evaluated with a contact angle tester, and the durability of the ZnO/SA modified cotton fabrics in corrosive liquids and under ultraviolet (UV) irradiation was tested. In addition, the oil/water separation efficiency of the ZnO/SA modified cotton fabrics towards the oil/water mixed solutions of n -hexane, liquid paraffin, dichloromethane, chloroform and motor oil with different density and viscosity was investigated; and their degradation rate under harsh conditions (e.g., immersion in acid and alkali or exposure to UV irradiation) was calculated. Results demonstrate that ZnO and SA are chemically bonded onto the surface of cotton fabrics to achieve super-hydrophobicity. The as-prepared ZnO/SA modified cotton fabrics exhibit a water contact angle of over 164°; and they retain the super-hydrophobicity after immersion in acid and alkali solutions or under UV irradiation. Besides, they have an oil/water separation efficiency of over 96.5% for all the tested liquids as well as a biodegradability rate of 59.0% after immersion in phosphate buffer saline solution containing cellulase (pH = 4.8) for 15 days. Therefore, the present approach could be applicable to constructing durable super-hydrophobic cotton fabrics with promising potential for oil/water separation in industry.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Guanzhou Luo,Lanfang Wen,Kai Yang,XinYing Li,Shouping Xu,Pihui Pi,Xiufang Wen
A robust and durable fluorinated 8-MAPOSS-based superamphiphobic fabric (Fabrics-S-MAPOSS-F) was obtained by in situ grafting of 3-Mercaptopropyltriethoxysilane (MPTES), 8-Methacryl polyhedral oligomeric silsesquioxane (8-MAPOSS) and 2-(perfluorooctyl) ethyl methacrylate (FMA) on a cotton fabric. The micropores and mesopores bonding structure with low surface energy on the as-prepared Fabrics-S-MAPOSS-F can capture air, endowing the fabric antifouling, self-cleaning, dehydration resistance, buoyancy boost, drag reduction performance, as well as good durability after UV irradiation, mechanical damage, 300 °C oven heating for 2 h and separately immersion in acid/base/salty solution, even in 98% H 2 SO 4 for 30 min. The Fabrics-S-MAPOSS-F can float on the surface of water or blended oil effortlessly with loading 18.8 times and 15.6 times its own weight of SiO 2 powder, respectively. Compared to untreated fabric, the Fabrics-S-MAPOSS-F exhibits a sailing velocity boost by nearly 2.5 times in both water and blended oil. The drag reduction rate is as high as ~154.7%. This novel smart Fabrics-S-MAPOSS-F can be considered a promising material in life jacket, special garments, package protection or smart device.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Maiping Yang,Chi Jiang,Weiqu Liu,Liyan Liang,Yankun Xie,Hongyi Shi,Fengyuan Zhang,Ke Pi
Despite the existing efforts, developing a versatile and less-harmful method is of difficulty for the preparation of durable superhydrophobic surfaces. Herein, a mild and water-rich approach is proposed to obtain fluorine-free robust superhydrophobic materials, which is prepared using composite solutions of polydimethylsiloxane (PDMS) and titanium dioxide (TiO 2 ) to reduce the usage of organic solvents. With the optimized PDMS solution/TiO 2 aqueous sol mass ratio (2:8), the coated cotton fabric possessed a water contact angle (WCA) of 156.9° and a shedding angle of 6.8°. The resulting superhydrophobic cotton fabric (SCF) also performed well under various harsh conditions. Furthermore, the SCF not only exhibited excellent anti-staining ability, but also could degrade organic pollutant under UV irradiation owing to its photocatalytic activity. More importantly, the SCF could be used repeatedly for oil-water separation and water purification without significant loss in its superhydrophobicity, which provide the prospect of employing in the field of environmental protection. The composite coating can be utilized on different substrates including PET fabric, non-woven fabric and sponge to impart superhydrophobicity to their surfaces. Overall, our work provides a facile, timesaving and less-harmful approach for fabricating multifunctional superhydrophobic fabrics, which have significant advantages in self-cleaning, outdoors and water treatment application.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Yuxiang Sun,Fangfang Shi,Yajun Niu,Yu Zhang,Fei Xiong
Lipid deposition induced various diseases including nonalcoholic fatty liver and hyperlipemia. The excessive accumulation of triglyceride (TG) and the deposition of fat were the two most critical causes. Here, we developed Fe 3 O 4 @ [email protected] nanoparticles (NPs) with amphiphilic structures, which exhibited an excellent role in eliminating excess TG. Hydrophobic TG was adsorbed efficiently by Fe 3 O 4 @ [email protected] NPs through the “liposuction effect” and the formation of [email protected] complex was then conducted. The [email protected] complex was further enclosed by the endosome based on the endocytosis and subsequently was taken into the lysosome, degrading with the help of lipases. Meanwhile, the “nano-enzyme effect” of Fe 3 O 4 NPs recovered the lipid-regulated proteins including PPARα, further triggering biodegradation pathways of TG, although the lipid-regulated proteins were obviously inhibited in the high-fat hepatocytes models. These two mechanisms of Fe 3 O 4 @ [email protected] NPs together achieved the down-regulation of TG in vivo and in vitro. Therefore, our findings provided a novel thought in treating these diseases associated with lipid deposition, that is, nanoparticles modified by specific structure exhibit a superior TG removal.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）