MACROMOLECULAR MATERIALS AND ENGINEERING
·
2016
·Vol. 301
·期 12
·1430-1436
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IF 2.834
Yi Wu,Shuxue Zhou,Limin Wu
Hydrophobic and super-hydrophobic materials have many important applications, but most of the artificially hydrophobic and super-hydrophobic surfaces suffer from poor durability. Herein, a facile method is reported to fabricate robust hydrophobic and super-hydrophobic polymer films through backfilling the silica colloidal crystal templates with the mixture of fluoropolymer, thermoset hydroxyl acrylate resins, and curing agent. After removal of the template, 3D ordered porous structures are obtained. The obtained polymer films have not only excellent hydrophobic or super-hydrophobic properties but also good stability against temperatures, acids, and alkalis. Dual ordered porous structure can obviously enhance the hydrophobicity of polymer films compared to unitary one.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Zengqi Lu,Xiaolong Fu,Jingwei Hou,Lei Yue,Jiamao Li,Guangming Ran,Chengjian Xiao,Xiaolin Wang
In order to enhance hydrogen-water isotope exchange performance, a hydrophobic microenvironment was constructed within the catalyst support and a bimetal catalyst was loaded. The catalyst was superhydrophobic, resulting in a significant improvement in performance. Through the adsorption/desorption performance test of water vapor, it was observed that the hydrophobic microenvironment could increase the diffusion rate of the reactant, while metal doping modification could enhance the concentration of the reactant around the active center. Comparatively, the catalytic performance of the catalyst containing the hydrophobic microenvironment was superior to that of the normal hydrophobic catalysts, even when the hydrophobicity was slightly diminished.
研究领域:
化学
·
材料科学
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核能科学
✓ 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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2021
·
IF 4.539
Bohao Yang,Mingbo Shi,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
The treatment of oil spill and the separation of oil-water mixture have been widely concerned in recent years. In this work, a one-pot synthesis strategy is developed to prepare fluorine functionalized zirconium-based metal organic framework (Zr-MOFs) (denoted as UiO-66-1F) by using 4-fluorobenzoic acid as modulator and modifier and p-phthalic acid (PTA) as ligand. 4-fluorobenzoic acid can participate in the formation of frameworks structure and cause structural defects, causing larger surface area and hierarchically porous structure. The hydrophobicity of UiO-66-1F increases with increasing of the ratio of 4-fluorobenzoic acid to zirconium chloride and when the ratio is 10, the synthesized UiO-66-1F(10) shows high hydrophobicity with a water contact angle (WCA) of 122° while the WCA of original UiO-66 is only 21°. UiO-66-1F(10) also has good chemical stability over a wide pH range (pH 1∼11) and good hydrothermal stability. In addition, a superhydrophobic sponge (UiO-66-1F(10)@PDA@sponge) with a WCA of 150° was prepared via in situ growth of UiO-66-1F(10) on a polydopamine modified sponge (PDA@sponge). The resulting composite shows high absorption capacities for various oils and organic solvents ranging from 50.5 g/g (n-hexane)– 107.8 g/g (dichloromethane) and good recyclability.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Lu Zhou,Xinzu Feng,Jihao Zuo,Lichun Dong,Cailong Zhou
Hydrophobic porous materials are of significant interest due to their potential for various large-scale industrial applications. In this study, we introduce the synthesis of a hydrophobic fluorine-containing covalent organic framework (F-COF), TAPB-TFA, using a low-temperature method, along with its applications in liquid marbles and oil/water separation. By a scandium(III) trifluoromethanesulfonate-catalyzed Schiff-base reaction, uniform spherical TAPB-TFA particles at the nanoscale are successfully synthesized. Results show that TAPB-TFA exhibits high crystallinity, excellent thermal and chemical stability, as well as superoleophilic/hydrophobic properties. The hydrophobic TAPB-TFA particles can be utilized to create various liquid marbles that exhibit excellent shape reconfigurability. Experiments confirm the outstanding performance of TAPB-TFA in separating oil/water mixtures and water-in-oil emulsions, achieving a separation efficiency of over 98.5%. The analysis concludes that the exceptional separation performance of TAPB-TFA is attributed to the synergistic effects of surface wetting-induced aggregation and size-sieving. TAPB-TFA demonstrates significant potential for applications in the environmental and energy sectors.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Yuchen Zhou,Yong Liu,Fanglin Du
The role of superhydrophobic coating in metal anti-corrosion, oil leakage treatment, waterproofing and antifouling cannot be overstated, yet the application of conventional superhydrophobic coatings is limited due to their toxicity, poor mechanical stability, and high cost. Herein we report our design on an eco-friendly wax-derived organic-based superhydrophobic coating based on self-designed sol and eco-friendly wax and integrated the spray coating technique . The W-GPAC coating exhibits superhydrophobicity (Contact Angle: 170.6°, Sliding Angle: 5.3°) with a glass substrate. It should be noted that the coating could preserve excellent superhydrophobic property in water spray impact test (Contact Angle:160° after 500 water impact cycles), linear abrasion test(Contact Angle:160° after 120 cm linear abrasion), and acid-base durability test (Contact Angle: greater than 165° after immersion in the acidic or alkaline environment for 600 min). In addition, the coating maintains outstanding adhesion with various substrates even at freezing treatment. The superior performance of the coating comes from the folded structure formed by the drying of GPAC sol which is formed by the dense siloxane crosslinking network of GPAC sol and long-chain silane on the coating surface . Taken together, the W-GPAC superhydrophobic coating enjoys low manufacturing cost, easy degradability, and no secondary pollution, and can be applied to almost commonly used substrates with superior mechanical durability, which could provide alternative solution for superhydrophobic application.
研究领域:
材料科学
·
表面工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaojie Li,Guangwen Zhang,Ku Du,Shaohui Yin,Yuhao Liu,Xiang Xu,Yangyang Liu
Fog collection has become one of the effective means to solving water scarcity. Wettability-mixed patterned surfaces exhibit great potential in fog collection. In this article, the desert beetle, honeycomb structures and cactus spines served as an inspiration in the proposal of a bionic pattern of honeycomb and cactus spine coupling (BPHCSC) that can efficiently collect fog. First, a superhydrophobic (SHB) surface was successfully prepared on the surface of 5052 Al alloy through combined electrochemical etching with fluorosilane modification. Subsequently, laser etching technology was used in the precise etching of a superhydrophilic BPHCSC on the SHB surface. Compared with the fog collection efficiencies of a single SHB surface and the honeycomb-like wettability-mixed patterned surface composed of rectangular channels, that of the prepared BPHCSC surface increased by approximately 23.5% and 4.27%, respectively. In addition, a thorough exploration was conducted on the effects of factors, such as the distance between the sample surface and the fog outlet, tilt angle and the number of laser etchings, on fog collection efficiency. This study provides a new idea for fog collection and exhibits a broad application potential in fields, such as microfluidic systems, droplet manipulation and cell screening.
研究领域:
材料科学
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生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3069
·
IF 4.329
Xiao Liu,Xiaofei Song,Ziming Wang,Chunlei Xia,Ting Li,Xiaoning Li,Qian Xu,Suping Cui,Shanshan Qian
A series of novel comb-like poly(butyl acrylate)-g-poly(dimethylaminoethyl methacrylate) (PBA-g-PDMAEMA) with different side chain lengths were designed and successfully synthesized by the “first main chain then side chain” method. Infrared Spectroscopy (IR),1H Nuclear Magnetic Resonance (1H NMR), and gel permeation chromatography (GPC) were used for structural confirmation and molecular weight characterization. This polymer exhibited responsive behavior from hydrophilicity to hydrophobicity under the alkaline environment of cement-based materials, with the contact angle of 105.6°, a decreased evaporation rate, and a hydrophile–lipophile balance (HLB) value. A significant internal hydrophobic effect on cement mortar was shown in the water absorption rate, which decreased by 75.2%, and a dry shrinkage-reducing rate of more than 30%. Furthermore, this polymer can effectively slow the exothermic rate, reduce the heat release, and delay the exothermic peak of cement hydration. It was interesting that these properties showed a direct correlation with the side chain length of the comb polymer. The aims of this study are to provide a new avenue to synthesize polymers with the spontaneous hydrophilicity–hydrophobicity transition in the cement system, achieving excellent internal hydrophobicity of cement-based materials, and to offer a promising alternative to resist external erosion for improving the durability and service life of cement-based materials.Keywords:hydrophilicity–hydrophobicity conversion;internal hydrophobicity;molecular design;cement-based material;hydration
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
·
2022
·Vol. 8
·期 7
·407
·
IF 4.432
Liangpeng Zeng,Ziqi Liu,Jingliang Huang,Xiaolin Wang,Hui Guo,Wei-Hua Li
Hydrogel is a kind of soft and wet matter, which demonstrates favorable fouling resistance owing to the hydration anti-adhesive surfaces. Different from conventional hydrogels constructed by hydrophilic or amphiphilic polymers, the recently invented “hydrophobic hydrogels” composed of hydrophobic polymers exhibit many unique properties, e.g., surface hydrophobicity and high water content, suggesting promising applications in anti-fouling. In this paper, a series of hydrophobic hydrogels were prepared with different chemical structures and water content for anti-fouling investigations. The hydrophobic hydrogels showed high static water contact angles (WCAs > 90°), indicating remarkable surface hydrophobicity, which is abnormal for conventional hydrogels. Compared with the conventional hydrogels, all the hydrophobic hydrogels exhibited less than 4%E. colibiofilm coverage, showing a contrary trend of anti-fouling ability to the water content inside the polymer. Typically, the poly(2-(2-ethoxyethoxy)ethyl acrylate) (PCBA) and poly(tetrahydrofurfuryl acrylate) (PTHFA) hydrogels with relatively high surface hydrophobicity showed as low as 5.1% and 2.4%E. colibiofilm coverage even after incubation for 7 days in bacteria suspension, which are about 0.32 and 0.15 times of that on the hydrophilic poly(N,N-dimethylacrylamide) (PDMA) hydrogels, respectively. Moreover, the hydrophobic hydrogels exhibited a similar anti-adhesion ability and trend to algaeS. platensis. Based on the results, the surface hydrophobicity mainly contributes to the excellent anti-fouling ability of hydrophobic hydrogels. In the meantime, the too-high water content may be somehow detrimental to anti-fouling performance.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Depeng Chen,Linling Cui,Hui Rong,De’e Liu,Yuan Fang,Thumelo Jonathan Sithole,Yaling Wang,Yajun Lv,Zhong Lv,Tengfei Xiang
The deterioration of cement-based materials is frequently associated with water infiltration. This work introduces hydrophobic nanoparticles (NPs) synthesized from silicon dioxide with varying particle sizes, which significantly enhance the water repellency when incorporated into mortar. The results indicate a clear negative correlation between the water contact angle (WCA) of the mortar and the size of the hydrophobic NPs; when 20 nm hydrophobic NPs are incorporated, the WCA can reach 153.16 °, exhibiting three-dimensional superhydrophobicity. Furthermore, the water absorption rate of the superhydrophobic mortar after 120 hours immersion is only 42.16 % of that of ordinary mortar. In electrochemical corrosion experiments, the corrosion current density of the superhydrophobic mortar is two orders of magnitude lower than that of ordinary mortar, effectively preventing corrosive liquids from penetrating the steel reinforcement within the concrete. This work provides a solid scientific and theoretical foundation for the widespread application of superhydrophobic cement-based materials in harsh, high-humidity, and corrosive environments.
研究领域:
建筑材料学
·
腐蚀科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 13
·10365-10371
·
IF 3.289
Lei Peng,Wenkang Lei,Ping Yu,Yunbai Luo
The separation of water and oil is a promising work due to the increasing worldwide oil pollution and leakage of chemical solvents. Superhydrophobic porous materials were prepared for their separation. In this work, various porous substrates of copper meshes, filter papers and polyurethane (PU) sponges were chosen to obtain superhydrophobic surfaces. Superhydrophobic surfaces were fabricated by polyvinylidene fluoride (PVDF) and hydrophobic nano-silica particle coatings through a spraying approach. The superhydrophobicity, stability of coatings and oil/water separation effect of these as-coated materials were studied. The results demonstrated that all the surfaces showed high water contact angles (>150°), good reusability and excellent oil selectively. Moreover, the coated filter paper was scaled up for practical use of removing trace water from mineral insulating oil in our group. It is promising that this superhydrophobic coating could be used in more applications.
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
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Jiangfan Chang,Xiaoyan He,Zongcheng Yang,Xiuqin Bai,Chengqing Yuan
Inspired by nature, the superhydrophobic surface has great potential for application in the field of antifouling due to its excellent fouling resistance. Nanocomposite coatings are an economical way to fabricate superhydrophobic surfaces by controlling the surface chemical composition and topography. However, the available open literature assessing the chemical composition effects on hydrophobicity and antifouling performance is rare. In this study, epoxy-based nanocomposite coatings with various wettability were fabricated by using the air-spray technique. The element distributions of the coatings at different depths were characterised by EDS and XPS . The results showed that the top coating surfaces of ER-F, ZnF40-1:5, and ZnF40-1:9 were enriched in F and Si elements, evidencing the self-stratifying. And by reducing the solid surface free energy , the hydrophobicity of ER-F, ZnF40-1:5, and ZnF40-1:9 was significantly improved. And the coating ZnF40-1:9 achieved super-hydrophobic. Based on the Young's equation and the “equation of state for the interfacial tensions”, it was found that the effect of solid surface free energy on CAH was greater than that on WCA due to the greater coefficient of the variable. The superhydrophobic coating ZnF40-1:9 shows great antifouling performance against marine diatom P. tricornutum and its antifouling rate is up to 94.1%. By reducing the surface free energy, the hydrophobicity of nanocomposite coatings can be improved significantly, consequently improving the antifouling performance effectively. These findings might provide insight into developing superhydrophobic nanocomposite coatings to inhibit biofouling.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2021
·
IF 0
Guangming Tan,Xiangyang Xue,Zhigao Zhu,Jiansheng Li
Membrane distillation holds promise for further recovery of reverse osmosis (RO)-concentrated seawater to realize zero-liquid discharge; however, severe scaling induced by high-concentration salts and fouling triggered by a naturally occurring substance would result in severe wetting of the hydrophobic distillation membrane. To retard membrane wetting during the concentration process, the membrane’s interfacial structure and the seawater’s ingredients were systematically investigated to improve the membrane’s durability. The results demonstrated that the dual-layer membrane with hierarchically rough beads-on-a-string structured fibers could enlarge the water evaporation area on the membrane surface to improve membrane water flux, and superhydrophobicity can reduce the contact area between the salt and membrane surface to prevent membrane scaling. Significantly, the membrane’s durability can be further improved by adjusting the seawater ingredients. This finding revealed that the scaling resulting from Ca2+ and Mg2+ when they exist alone is more severe than when they exist together. Therefore, eliminating the dominant Ca2+, Mg2+, and naturally occurring substance in seawater and maintaining it in a neutral state can stably concentrate the seawater with a high water recovery of ∼85%. The regulation of the membrane interface integrated with optimal seawater ingredients is essential for the application of membrane distillation in the treatment of RO-concentrated seawater.
研究领域:
环境工程
·
水处理
·
海水淡化
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）