INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Yurong Zhao,Xing Xing,Congbin Xu,Yali He,Chen Yang,Jianzhong Zheng,Zhiqiang Hu
Maintaining hydrophobicity of the membrane in membrane distillation is vital for treating high-salinity feedwater containing surface active substances due to their wetting impact on the membrane. An effective approach to mitigate membrane wetting is to build rough nanostructures on a pristine membrane to render its surface omniphobic. Directly building nanostructures on polypropylene (PP), however, is challenging, as the material is chemically inert. In this study, a novel method was developed to physically plant ZnO seeds on the PP membrane above the material’s heat deflection temperature. A biomimetic nanostructure was then constructed on the membrane surface by growing fluorinated ZnO nanorods along the seeded PP substrate. The resulting omniphobic membrane exhibited a contact angle constantly above 160° against a test solution containing 50 g/L NaCl and 0.06 mM sodium dodecyl benzenesulfonate. Compared to the pristine PP membrane, the modified PP membrane showed a nearly complete salt rejection and much improved antiwetting capacity against the surfactant added in the test solution. The physical seeding method presented in this study is therefore a promising alternative approach to functionalize chemically inert polymeric substrates with constructed biomimetic nanostructures.
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
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Jianwen Peng,Peng Ye,Xinyu Bu,Yue Zhang,Yanji Zhu,Ruitao Wang,Di Bao,Huaiyuan Wang
Photovoltaic (PV) modules have become a powerful contributor to global CO 2 emissions mitigation, but have suffered a significant loss in power generation efficiency caused by the deposition of surface contamination. Conventional self-cleaning coatings typically require laborious fabrication processes, elaborate texturing, and fluorinated materials, which are difficult to integrate with transparency, environmental compatibility, and adaptability. Herein, we show a highly transparent, fluorine-free, and dynamically omniphobic liquid-like polyurethane coating (LLPuC) prepared by well cross-linking between polydimethylsiloxane (PDMS)-grafted hydroxyacrylate (P x HA y ) copolymer and polyisocyanate at elevated or room temperature. The LLPuC could be applied to various substrates by spraying or blading methods and has demonstrated good transparency (91.79 % at 550 nm) of the coated glass. The liquid-like flexible chains of PDMS were enriched on the LLPuC and moved spontaneously, resulting in a smooth surface with dynamic omniphobicity (WSA = 11.5 ± 0.6°, OSA ≤ 15°), anti-smudge, and self-cleaning capability, as evidenced by the LLPuC coated PV module achieving a 92.83 % efficiency recovery ratio after the self-cleaning process. Moreover, the obtained coating also exhibited good adhesion strength, flexibility, anti-abrasion, and stability. Thus, the approaches and findings in this work have opened up a new avenue for self-cleaning coatings of PV modules and various outdoor transparent devices.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Jianfeng Li,Shujuan Guo,Zhaozan Xu,Jianguo Li,Zihe Pan,Zhiping Du,Fangqin Cheng
In order to reduce the wetting and fouling propensity of polyvinylidene fluoride (PVDF) membrane during coking wastewater treatment by membrane distillation, two kinds of omniphobic PVDF composite membranes were prepared by coating SiO 2 nanoparticles on PVDF membrane surface via electrostatic adsorption or chemical bonding respectively, and subsequently fluorination. The coated SiO 2 nanoparticles observed as amounts of nano-scale protrusions by scanning electron microscope constructed a re-entrant structure and enhanced membrane surface roughness . The omniphobicity of the modified membranes was confirmed by high contact angles (> 150°) for water, diiodomethane and ethylene glycol on the membrane surface. The omniphobic layer with SiO 2 nanoparticles coated via chemical bonding was more stable than electrostatic adsorption. Both the omniphobic PVDF membranes exhibited stable and high rejections of the inorganic and organic contaminants, which were determined by conductivity, total organic carbon and three-dimensional excitation-emission fluorescence spectroscopy of the distillate. The modified omniphobic membranes also showed much less flux decline than the pristine PVDF membrane in direct contact membrane distillation tests (120 h), suggesting their excellent anti-fouling performance. This study indicates that coating silica nanoparticles via chemical bonding is an effective and promising method to fabricate omniphobic PVDF membrane for coking wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 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
Deke Li,Yufeng Fan,Guocai Han,Zhiguang Guo
Superwetting surfaces that repel various liquids have been exciting for biomimetic research and have displayed versatile potential applications. Generally, superhydrophobic coatings can allow for droplet rolling off and antifouling, whereas it is a challenge to achieve superomniphobic surfaces with transparency, flexibility, and conductivity. Here, we adopt an effective and simple method to fabricate a superomniphobic, transparent, and flexible smart silk fibroin (SF) membrane by spray-coating long AgNWs dispersed in polydimethylsiloxane (PDMS), followed by treatment with vacuum drying. The resulting SF/AgNWs membranes are super-repellent to different liquids with low surface tension and water, and demonstrate high contact angles (CAs) more than 150° and low rolling-off angles (RAs) even less than 10°. Moreover, the obtained membranes display superior sensitivity under stretching and bending, as well as intact stability of high transparency, which can be considered as promising flexible sensing electronics to detect human motions under wet conditions.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Zhigao Zhu,Lingling Zhong,Thomas Horseman,Zhiyuan Liu,Gaofeng Zeng,Zhenyu Li,Shihong Lin,Wei Wang
Wetting induced by salt-scaling and surfactants is the Achilles heel of membrane distillation, especially for concentration of high salinity wastewater. Herein, we rationally developed a membrane with robust wetting resistance by integrating superhydrophobic-omniphobic surface and anti-deformable pores into one system. The membrane was first developed by electrospinning, which was then modified with surface roughness , and followed by coating of polydimethylsiloxane to weld the intersecting fibers and fluoroalkylsilane to lower the membrane surface energy. The product exhibits excellent wetting resistance when concentrating the high salinity NaCl solution from 20 to 38 wt% (saturation condition), the simulated reverse osmosis concentrated water, the gypsum and the low-surface-tension high salinity wastewater. Moreover, the mechanism of membrane wetting resistance was also systematically discussed based on the experiment and computer simulation. It reveals that the superhydrophobic-omniphobic surface could stabilize the surface-bound air layer chemically, thus reducing the contact of crystals and surfactant with the membrane surface. Simultaneously, the anti-deformable pore also helps it overcome the asymmetrical hydraulic disturbance on enlarging membrane pore size, thus stabilizes the surface-bound air layer structurally. The presented development will provide a platform to understand and achieve wetting and scaling inhibition MD membrane for high salinity wastewater treatment .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Zian Wang,Longhui Zheng,Lixin Wu,Zixiang Weng
Omniphobic coatings with low contact angle hysteresis (CAH) are of great practical significance. Yet, the mass production of coating with high transparency and a long service life through a facile and scalable approach still remains a challenge. By constructing covalent bonds between glass substrate and coating, in this work, a facile approach for the preparation of slippery coating for glass by ultrasonically immersing the substrate in a copolymer solution was proposed, which is a promising material to meet all aforementioned requirements. Corresponding results showed that the CAH for water and hexadecane on the surface of coating are both lower than 5°, while the CAH for high-viscosity glycerol is around 13°. Also, the transmittance of the coated glass at a visual wavelength of 550 nm is as high as 93 %. Thanks to the thermal self-healability of the coating, the omniphobicity experienced sand drop abrasion, water cleaning and high-speed water impact can be regained. Still, the transmittance is over 90 %. Meantime, it is gratifying to see that the omniphobicity can be self-healed by using a portable hair drier at a designated area efficiently. This facile approach presented here shows potential in the scalable preparation of self-cleaning and anti-fouling coatings with high transparency.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Shidong Zhao,Limin Wu,Shuxue Zhou
Achieving hard anti-smudge coatings that combine self-healing of lubricant-impregnated surfaces and omniphobicity of liquid-like surfaces presents a critical challenge. To address this issue, nanoscale silicone oil pools were generated by emulsifying silicone oil with an amphiphilic polydimethylsiloxane (PDMS)-bearing polysiloxane sol, which were then incorporated into the methyltrimethoxysilane-derived sol to create mechanically robust, transparent, and self-healing coatings. The key was the employment of both a PDMS network and single-end grafted PDMS brushes, with the former providing molecular-level channels for the secretion of silicone oil molecules and the latter strengthening the dynamic omniphobicity of hard coatings. Additionally, the tight physical entanglement between the cross-linked PDMS network and the silicone oil imparts excellent resistance to fluid erosion, thereby ensuring long-term anti-smudge performance.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Xiaozhen Hu,Mutian Yang,Dejian Yang,Defu Xu,Jiangang Lu,Lin Zhou
Interfacial solar desalination has shown great potential to address the global freshwater scarcity attributing to the advantages of high energy conversion efficiency, environmental friendly, cost effective and so on. However, accompanied by rapid vapor generation in the interfacial region, salt simultaneously crystallizes on the surface of photothermal materials, especially in highly concentrated brine, which would seriously affect the efficiency and long-term stability due to the blocking of vapor escaping channels as well as decreasing of solar absorption. In addition, organic substances in seawater may also pollute the absorbers during evaporation. Here, we demonstrate an omniphobic-hydrophilic melamine sponge based janus photothermal absorber by taking advantage of the 1H,1H,2H,2H-perfluorooctyltrichlorosilane modification, providing the upper layer both hydrophobic and oleophobic features, resulting in salt resistance and anti-fouling performance, respectively. Even with saturated NaCl solution as input, no salt accumulation was observed on the light absorbing surface during 8 h continuous evaporation. Moreover, the absorber exhibits excellent anti-fouling properties in oily water. Our strategy provides an avenue for the development of multifunctional solar absorbers aiming to sustainable treatment of highly concentrated brine and oil-bearing water.
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 Materials Chemistry A
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2025
·
IF 9.5
Ximing Zhong,Shunfeng Hu,Lingfeng Li,Xizhi Zhang,Guowei Liang,Dengle Duan,Hongjun Zhou,Xinhua Zhou
In this work, a novel biopolymer-based omniphobic coating system is developed by using mercaptosuccinic acid-modified soybean oil biopolymer as a coating precursor (SOMA), polysilazane (PSZ) as an omniphobic agent, and trimethylolpropane tris(2-methyl-1-aziridinepropionate) (TTMAP) as a curing agent. The resultant omniphobic coatings are highly transparent with smooth surfaces due to inherent coating compatibility. And the introduction of polysilazane effectively reduces coating surface energy, bestows the coatings with remarkable anti-smudge properties, making them available for anti-ink, anti-graffiti, and anti-fingerprint applications. Also, these coatings exhibits outstanding chemical shielding performance to protect substrates from exposure to extreme corrosive environments. In addition, they are verified to be mechanically robust, and can be toned into various colors without compromising coating omniphobicity. By experimental comparison, these omniphobic coatings show incomparable advantages over commercial fluorinated omniphobic coatings, superomniphobic coatings, and superhydrophobic coatings in view of liquid repellency and application prospect. More strikingly, they are able to repel bacterial suspension and inhibit bacterial adhesion, thus providing substrates with low bacterial adhesivity. Therefore, these newly-developed biopolymer-based omniphobic coatings are sustainable and versatile in functions, and enormously promising for widespread applications.
研究领域:
材料科学
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表面化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Huimin Chen,Yangyang Mao,Binyu Mo,Yang Pan,Rong Xu,Wenqi Ji,Guining Chen,Gongping Liu,Wanqin Jin
Novel design of omniphobic membrane could relieve the wetting phenomenon caused by low surface energy contaminants in the feed of membrane distillation process. In this work, we reported on a new kind of omniphobic graphene oxide (GO) membrane fabricated by plasma treatment and subsequent fluoroalkyl grafting of stacked GO laminates. The plasma treatment not only created in-plane nanopores in GO nanosheets to provide more water channels, but also added active sites for fluoroalkyl grafting to build a robust omniphobic membrane surface. The resulting omniphobic membrane exhibited outperformed water flux of ∼35 kg m −2 h −1 and salt rejection of 99.9% for 35 g L −1 NaCl solution with 0.2–0.4 mM sodium dodecyl sulfate (SDS) at 60 °C during over 450 h of direct contact membrane distillation (DCMD) process. This work provides a facile strategy to develop high-flux and wetting-resistance materials for membrane distillation.
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
DESALINATION
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2023
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IF 9.9
Rongchao Wang,Hao Zhang,Liang Zhu,Lin Chen,Wucheng Ma,Longjie Jiang,Yue Zhu,Bin Wu,Wei Zhang
Membrane distillation (MD) with the application of omniphobic membranes shows much promise for desalinating saline wastewater containing low surface tension contaminants. However, the complicated membrane production steps and the wetting of the membranes have hindered its industrial application. This study reported a simple and highly efficient air spraying strategy to fabricate an omniphobic membrane by spraying a coating solution comprising fluorinated multi-walled carbon nanotubes (F-MWCNTs) onto a commercial polytetrafluoroethylene (PTFE) membrane. The contact angles for water and hexadecane on the surface reached 173.0° and 161.2°, and the water flux remained stable for 12 h when tested in DCMD with low surface tension fluids (SDS and STAC). The omniphobic membrane showed higher wetting resistance in direct membrane distillation (DCMD) experiments than the PTFE membrane when feeding low surface tension feed solutions. During spraying, F-MWCNTs randomly accumulated, and solvent evaporation resulted in micron-level mounds and surface roughness . The presence of air gaps on the membrane surface prevented the surfactant molecules from directly contacting the membrane surface and enabled the membrane to operate generally in the liquid with surfactant for a long time. The membrane was not only resistant to wetting of liquids containing low surface tension but was also easy to prepare and was expected to be used for large-scale desalination of low surface tension wastewater.
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
PROGRESS IN ORGANIC COATINGS
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2019
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IF 3.42
Yingfen Huang,Xiaohong Ding,Chang Lu,Longshan Bai,Huaimin Guan,Yuejin Tong
A facile approach to fabricate transparent and nonfluorinated coatings with dynamical omniphobicity on diverse substrates was developed. Hydrosilane formation was conducted using non-stoichiometry liquid silicone (Sylgard 184) on the surfaces of glass, silicon wafer , stainless-steel, acrylic sheet and silicone rubber, followed by covalently grafting monovinyl-terminated polydimethylsiloxane to hydrosilane. The resultant liquid-like coatings showed contact angle hysteresis and sliding angle below 5° for water and below 10° for n-hexadecane, revealing excellent repellency to both polar and non-polar liquids. Moreover, the coatings displayed high self-cleaning performance, not only for liquid contaminants but also for solid contaminants.
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）