NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 30
·14289-14296
·
IF 3.3
Xin-Xin Chen,Yu-Ping Zhang,Hong-Li Du,Li Wan,Cheng-Gang Zuo,Ling-Bo Qu
Membrane separation is a very promising and economical method for gravitational oil/water separation and the collection of oil spills. Both superhydrophilicity/underwater superhydrophobicity (SHL&UWSOB) and superhydrophobicity/superlipophilicity (SHB&SOL) are suitable materials for the solution. In this work, an ingenious design strategy of “two birds with one stone” to modify Ni foams (NFs) was developed, in which SHL&UWSOB was initially fabricated by the in situ growth of a bimetallic Fe/Ni-MOF on an NF surface by solvothermal synthesis. Further modification based on the resultant SHL&UWSOB-NF led to the construction of a SHB&SOL surface by simple immersion of stearic acid. The micro/nano structure beneficial to underwater superoleophobicity was tailored by optimizing the solvothermal reaction time in the range of 10–24 h. The results showed that SHL&UWSOB-NF was obtained with a high oil contact angle (OCA) of 165.9° under water when the time of the solvothermal reaction was kept at about 18 h. Likewise, the further modified NF exhibited an obvious SHB&SOL property with a water contact angle (WCA) of 156.3° and a water rolling angle (SCA) of 9°. The light oil (n-hexane) floating on the water's surface and heavy oil of carbon tetrachloride (CCl4) at the bottom of the water, as well as the mini-separation of oil/water, demonstrated its facile and versatile application as a separation medium. The strategy may offer new approaches for the fabrication of superwetting/superantiwetting separation materials for oil/water separation and oil collection.
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
Nanomaterials
·
2022
·Vol. 12
·期 9
·1531
·
IF 5.719
Xiangcai Ge,Zhijun Zhou,Zheng Tan,Shoufei Wang,Xingchuan Zhao,Guina Ren,Bo Ge,Wei Li
Environmental pollution and clean water production are challenges to the development of human society. In this paper, devices consisting of a superhydrophobic Ni-CoFe2O4foam layer (floating layer), a hydrophilic channel and a superhydrophilic Ni-CoFe2O4foam layer (photothermal conversion layer) were designed. The light energy was converted into heat on the photothermal layer, for which the hydrophilic channel provided a small amount of water. The superhydrophobic layer ensured the floating and selective adsorption of organic solvents on the water surface, whose contact angle reached 157°, and the steam production rate reached 1.68 kg·m−2·h−1. Finally, the LSV curve demonstrated that the Ni-CoFe2O4foam prepared had a minimum starting potential, achieving the multifunctionality of the Ni foam.Keywords:superhydrophobic;oil–water separation;clean water production
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Mingming Wu,Bin Xiang,Peng Mu,Jian Li
Superwettable membranes with superhydrophilicity/underwater superoleophobicity (SHL/UWSOB) or hydrophobicity/underoil superhydrophobicity (HB/UOSHB) are considered critical components in the chemical industry. However, despite the unique wettability of these membranes, there are still challenges in meeting the needs of the developing society. Herein, a Janus nanofibrous membrane with a special micro-nanostructure was constructed by a bottom-up electrospinning strategy using two different precursors: zeolitic imidazolate framework-8-polyacrylonitrile/ N,N -dimethylformamide (ZIF-8-PAN/DMF) and candle soot-polyacrylonitrile/ N,N -dimethylformamide (CS-PAN/DMF). The PAN@ZIF-8 nanofibrous membrane exhibited HB/UOSHB, with water contact angles higher than 150° in oils, whereas the PAN@CS nanofibrous membrane displayed favorable SHL/UWSOB, with oil contact angles greater than 151° in water. Simultaneously, the resulting Janus nanofibrous membrane exhibited excellent rejection rate (99.1%) towards various oil–water emulsions and a high flux of up to 1720 ± 20 L m −2 h −1 driven only by gravity. The as-prepared Janus membrane was cycled five times without compromising the flux and rejection rate, demonstrating its satisfactory cycling stability. Comparative analysis demonstrated that the comprehensive separation performance of the resulting Janus nanofibrous membrane was superior to that of current homogeneous or other Janus membranes. More importantly, the as-prepared Janus membrane exhibited favorable chemical stability under harsh conditions (acidic and alkaline environments). This study presents a facile and efficient method for constructing a performance-stabilized Janus membrane, which can be utilized for multiple applications, such as oil–water separation, osmotic gasification, and seawater desalination.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Linlin Yu,Ruoyu Chen,Qian Jia
Oily wastewater, especially oil-water emulsions, has caused severe environmental damage. It is urgent to develop a simple, efficient superhydrophobic and superoleophilic material to address this issue. In this work, a multifunctional sponge based on MOF was proposed. The hydroxy-assisted method was employed to prepare MOF-5 with metal coordination centers. Subsequently, octadecylphosphonic acid (OPA) was used to hydrophobically modify MOF-5 to prepare stable and hydrophobic OPA-MOF-5. Polydimethylsiloxane (PDMS) with low surface energy was employed as the adhesive, and the hydrophobic OPA-MOF-5 was loaded onto the polyurethane (PU) sponge to obtain the stable superhydrophobic OPA-MOF-5@PDMS@PU with a WCA of 155.9°. The produced modified sponge exhibited high sorption capacity and oil-water separation efficiency, with a sorption capacity of 26.7 (petroleum ether)-85.6 (chloroform) g/g and a separation efficiency of over 99 %. It has also shown satisfactory emulsion purification and flame retardancy capacities.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Canyu Cui,Shihui Jiao,Wenwen Wang,Guangsheng Pang
It is essential to synthesize a versatile organic solvent/water separation material with excellent stability and durability. Superwetting materials, known for their multiple practical functionalities in everyday life and industrial production, have been receiving special concern for years. In this paper, the multifunctional superhydrophobic surface has been successfully prepared by coating polydimethylsiloxane (PDMS) onto three-dimensional nest-like Co-Ni layered double hydroxides (LDHs) using fabrics as a substrate (N Co-Ni LDHs/PDMS). The hierarchical nest-like structure of Co-Ni LDHs promotes the formation of abundant air cushions and enhances self-cleaning ability under liquid, which is beneficial to the efficient separation of organic solvent/water mixture. The results fabrics (superhydrophilic N Co-Ni LDHs and superhydrophobic N Co-Ni LDHs/PDMS) exhibit a high separation efficiency of 99.1 % and a flux of 11400 L m −2 h −1 for n-hexane, kerosene, cyclohexane, tetrachloroethylene and tetrachloromethane. The separation efficiency is above 99.0 % and flux is above 10200 L m −2 h −1 after 10 cycles of separation. The superhydrophobic N Co-Ni LDHs/PDMS can load 21 times its own weight and sail on water at a velocity of 60 cm s −1 . Additionally, the superhydrophobic fabrics display excellent chemical stability and mechanical durability. The as-fabricated fabrics are suitable for application in organic solvent/water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 26
·21362-21366
·
IF 3.289
Yu-Peng Liu,Hui-Fen Liu,Yan-Ge Feng,Zhi-Lu Liu,Hai-Yuan Hu,Bo Yu,Feng Zhou,Qun-Ji Xue
Transparent superhydrophobic coatings for the protection of material surfaces are becoming more and more important along with the rapid development of intelligent electronic displays. Here we present an easily fabricated, transparent and healable superhydrophobic self-cleaning coating. The polyaniline nanofiber network is coated with a silica shell by chemical vapor deposition of tetraethoxysilane catalyzed by ammonia. A porous silica nanotubular coating is obtained after calcination. By releasing perfluorooctyl acid packed in the pores of nanotubes at mild conditions, healable self-cleaning performance of the coating is achieved. The coating has high transparency for reading letters and pictures beneath the coated glass plate.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Frontiers in Materials
·
2023
·
IF 3.2
Wang Wei,Song Xiangning,Xie Yan,Sheng Xuejia,Zhang Shucai
In recent years, oil spills and organic pollution have caused severe damage to the ecological environment. Therefore, the treatment of oily wastewater has become a serious challenge. Here, with the help of melamine foams as a substrate, MXene nano-rough structures were built, and cetyltrimethoxysilane was grafted onto their surfaces to create an oil-absorbing material that is both user-friendly and effective at oil-water separation. Due to the nano structures of MXene were constructed and the long-chain silanes were modified on the foam surface, the material became superhydrophobic. In addition to being able to selectively absorb oils from an oil/water mixture (including emulsified oils) up to 111 times its weight, the modified foam was found to have a water contact angle of 157 which could selectively absorb oil but not water. Furthermore, it demonstrated sustained hydrophobicity and lipophilicity after experiencing strong acid/alkali or prolonged high-temperature treatment, allowing for various scenarios where oil-water separation can be used in severe settings without compromising performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·569
·
IF 3.4
Lei Fan,Bo Li,Yan Wang,Jinhang He,Jie Bai,Tao Zhu,Yuan Yuan
The icing of glass insulators is likely to cause faults such as insulator flashover, which poses a serious threat to the power system. Traditional deicing techniques have the disadvantage of being costly and inefficient. Herein, polytetrafluoroethylenes (PTFEs) as nanoparticles and epoxy and fluorosilicone resins as binders were blended to construct an anti-icing coating. The superhydrophobic (SHP) epoxy/fluorosilicone/PTFE coatings for anti-icing were successfully prepared on glass slides through one-step spraying. The effect of PTFE mass fraction on the microstructure, on the wettability and on the anti-icing properties of the coatings was investigated. The results showed that the coatings with different PTFE mass fractions had different microstructures. When the PTFE mass fraction was 47.2%, the SHP coating exhibited a uniform rough structure with an apparent contact angle as high as 164.7° and a sliding angle as low as 3.2°. Moreover, the water droplets can bounce back five times with a contact time of only 9.5 ms and a rebound height of 4.58 mm. In the low-temperature environment (−10 °C), the SHP coating displayed good anti-frosting, anti-icing and icephobic properties. The delayed frosting time (1499 s) and delayed freezing time (1295.3 s) of the SHP coating were three and five times longer than those of the glass, respectively. The SHP coating presented an ice-adhesion strength (39.8 kPa) that was six times lower than that of glass. The prepared SHP coating demonstrated potential applications for the anti-icing of glass insulators.Keywords:superhydrophobic;PTFE;spraying;anti-icing
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2023
·Vol. 75
·期 9
·3353-3364
·
IF 2.6
Jia Wenhu,Cao Huaijie,Zeng Yanwei,Chen Xiaohang,Xu Qunjie
Anticorrosive coatings for corrosion protection on aluminum alloy remain challenges in high protection efficiency and stability with facile design. Here, a stable superhydrophobic film is successfully prepared on 5052 aluminum alloy (AA5052) by electrodeposition to enhance its corrosion resistance in 3.5 wt% NaCl solution. The contact angle reaches 157° at the electrodeposition voltage of 10 V. Electrochemical tests confirm that it can serve as a highly effective and stable coating for corrosion protection with an inhibition efficiency ( η ) of 99.1%. The charge transfer resistance of the coated Al alloy increases remarkably from 8.955 kΩ cm 2 to 366.1 kΩ cm 2 . Besides, the superhydrophobic surface shows good stability when it is exposed to air and NaCl solution for a long time. After immersion for 12 days in 3.5 wt% NaCl solution, the superhydrophobic coating still exhibits a low corrosion current density of 3.309 × 10 -7 A/cm 2 . The synergy effects of the superhydrophobicity and the Ce 3+ endow the coating with remarkably enhancing corrosion resistance. This facile strategy can provide new ideas for designing highly effective and stable anti-corrosion coatings on aluminum alloy.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jisheng Yang,Han Li,Zede Yi,Murong Liao,Zhiyong Qin
Superhydrophobic treatment of wood is of great significance for improving the service life of wood and expanding its application fields. In this study, two process methods were designed to meet above requirements. Using polydopamine (PDA), 3-mercaptopropyltriethoxysilane (KH580) and nano-Al 2 O 3 as the micro-nano structure maker and octadecyltrichlorosilane (OTS) as a low surface free energy agent to modify rough surface in order to prepare superhydrophobic wood samples (Wood@One-step and Wood@Two-step). The contact angle (CA) and sliding angle (SA) of the Wood@One-step were 155.3° and 4.76°, respectively; the CA and SA of the Wood@Two-step were 152.9° and 7.65°, respectively. Surface electron microscopy (SEM) images showed that the surface of Wood@One-step and Wood@Two-step were honeycomb structure and layered stacking structure respectively. The superhydrophobic properties of Wood@One-step were superior because of its more reasonable micro-nano roughness. Atomic force microscope (AFM) images presented that the nano-Al 2 O 3 particles could effectively provide nano-level roughness. X-ray photoelectron spectroscopy (XPS) analysis showed that KH580 had covalent interaction with PDA. Thermogravimetric (TG) analysis, the immersion of acid-base solution and organic solution revealed that obtained superhydrophobic wood samples had excellent stability in the face of environmental challenges.
研究领域:
材料科学
·
木材科学
·
表面化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 12
·2086
·
IF 5.719
Yuxin Wang,Jiahuan Chen,Yifan Yang,Zihan Liu,Hao Wang,Zhen He
This study develops the nanostructured superhydrophobic titanium-based materials using a combined preparation method of laser marking step and the subsequent anodizing step. The structural properties were determined using an X-ray diffractometer (XRD) and scanning electron microscope (SEM), while the performance was explored by wear and corrosion tests. The laser marking caused a rough surface with paralleled grooves and protrusions, revealing surface superhydrophobicity after organic modification. The anodizing process further created a titanium oxide (TiO2) nanotube film. Both phase constituent characterization and surface elemental analysis prove the uniform nanofilm. The inert nanosized oxide film offers improved stability and superhydrophobicity. Compared to those samples only with the laser marking process, the TiO2nanotube film enhances the corrosion resistance and mechanical stability of surface superhydrophobicity. The proposed preparation pathway serves as a novel surface engineering technique to attain a nanostructured superhydrophobic surface with other desirable performance on titanium alloys, contributing to their scale-up applications in diverse fields.Keywords:titanium alloy;nanostructure;superhydrophobicity;anodic oxidation
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 44
·e202404251
·
IF 1.9
Zichao Yin,Zhenhua Sun,Junyi Li,Haigang Zhou,Jingjing Qi,Weidong Wang
Graphical A multifunctional coating composed of PTFE, PDMS, and nano silica was successfully prepared via deposition coating and heating treatment in this study, which possessed excellent anti-corrosion, anti-scaling, anti-fouling, anti-icing, and self-cleaning properties. This superhydrophobic coating can be loaded onto various facilities and equipment as top finish, protecting the substrates from water containing contaminants. This coating may have broad applications in the field of metal substrate protection. PTFE-based superhydrophobic coatings have received increasing research and the fabricated coatings exhibited excellent anti-corrosion, anti-scaling, anti-fouling, and anti-icing properties. In order to further enhance the hydrophobicity of PTFE coating, a PTFE-based coating consisted of nano-silica and polydimethylsiloxane (PDMS) was fabricated by deposition coating and annealing treatment. The water contact angle and sliding angle of the coating achieved 160.65° and 3.02°, respectively, demonstrating it possessed superhydrophobic property. Due to its excellent surface feature, the coating exhibited resistance to milk, coffee, and mud water, and could be easily cleaned by water flow. Besides, the water droplet on the coating had a longer freezing time and the ice droplet could be easily removed from the coating. Ascribed to the abundant nonpolar groups and the air cushion formed under water, the prepared coating had outstanding anti-scaling and anti-corrosion properties. The electrochemical impedance of the steel plate with the coating (above 9000 Ω·cm 2 ) increased by two orders of magnitude compared with the non-coating one (78.2 Ω·cm 2 ), and the anti-scaling rates of the coating towards BaSO 4 and SrSO 4 were all above 80%. It is promising that the coating will be a competitive candidate in many application fields.
研究领域:
材料科学
·
表面工程
✓ 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）