Materials
·
2023
·Vol. 16
·期 9
·3532
·
IF 3.4
Ruohan Xia,Bing Zhang,Kousuo Dong,Yao Yan,Zisheng Guan
Superhydrophobic coatings with excellent water-repellent properties imply a wide range of application areas. However, improvements are needed in terms of stability and complex processing procedures. In the present study, a superhydrophobic coating on Al sheets was prepared by mixing hexadecyltrimethoxysilane (HDTMS)-modified SiO2nanoparticles and acid-catalyzed silica sols (HD-SiO2/SiO2Sol) with polydimethylsiloxane (PDMS) binder. The HD-SiO2nanoparticles and acid-catalyzed silica sol (SiO2sol) form a binary graded micro-nanostructure, providing excellent superhydrophobicity (Water Contact Angle = 158.5°, Sliding angle = 0°). Superhydrophobic coatings with excellent water-repellent properties have potential for corrosion prevention. However the commonly used organic resins have poor chemical and mechanical properties. In the present study, the results of outdoor exposure for 30 days, immersion in acid and alkaline solutions for 24 h, grit abrasion, and water impact experiments, respectively, showed that the prepared superhydrophobic coating has good wear resistance. The integrated superhydrophobic coating on the Al sheets exhibited good corrosion inhibition with an efficiency (η) of 98.9%, which is much higher than that of the uncoated sheets. The present study provides a promising approach for producing stable superhydrophobic coatings at a low cost, with the potential to supplant conventional organic resin anti-corrosion coatings.Keywords:superhydrophobic;SiO2;surface modification;anti-corrosion
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
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Mengnan Yu,Rongzhan Liu,Yanwei Du,Zhenyu Ni
Cotton fabric is widely used for its excellent wearability but often suffers from drawbacks such as poor stain resistance, susceptibility to corrosion, and low colorfastness. Here, we introduce a novel method to create colorful superhydrophobic cotton fabric using octadecylamine-modified dialdehyde cellulose (DAC/ODA) particles as building units, which are synthesized via a Schiff base reaction and subsequently dyed with active dyes. Leveraging the film-forming ability of ODA and the affinity between cellulose materials, DAC/ODA formed a robust coating on the cotton surface, with its microstructure precisely controlled through thermal induction. The resulting fabric (DAC/ODA/Cotton) exhibited exceptional superhydrophobicity, with a water contact angle of 155° and an osmotic pressure of 426.2 mm. The uniform coverage of DAC/ODA on cotton fibers also ensured high air permeability (33.1 mm/s). Additionally, DAC/ODA/Cotton demonstrated outstanding antifouling performance against various common liquids and water can easily remove dust from its surface. Importantly, the fabric maintains its superhydrophobicity under extreme conditions such as high temperature, UV radiation, and acid-base exposure. Even after 100 abrasion cycles, no significant changes in surface morphology and color on DAC/ODA/Cotton were observed. This fluorine-free, environmentally friendly approach offers significant potential for developing multifunctional textiles and coatings with broad applications while reducing environmental impact.
研究领域:
材料科学
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纺织工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Weitao Song,Huiping Song,Shirui Zhang,Zhenlian Fan,Fangqin Cheng
Superhydrophobic coatings have garnered immense attention in recent years. Nevertheless, the creation of superhydrophobic coatings is often associated with high production costs and comparatively intricate fabrication processes. In this paper, we utilize cheap and easily available ultrafine fly ash(FA) as the main raw material to replace the expensive filler substances traditionally used for constructing rough structures, and Polydimethylsiloxane(PDMS) as a low surface energy modification to construct FA-based superhydrophobic coatings by a simple spraying method. The PDMS/FA coating surface exhibits a water contact angle(WCA) of 157.65°and a water sliding angle(WSA) of 2.00° The irregular morphology of the FA is conducive to forming a rough texture on the coating surface, which captures more air, leading to the formation of a stable air layer. Molecular dynamics (MD) simulations provide an insight into the anti-wetting mechanism of the superhydrophobic surface through an analysis of energetic and dynamic properties. PDMS/FA coatings remain superhydrophobic at 150 °C, in UV, and in varying pH environments. In addition, PDMS/FA coatings offer excellent mechanical, self-cleaning and anti-icing properties. This innovative approach to superhydrophobic coating, utilizing solid waste material as a basic material, demonstrates potential applicative value in fields such as self-cleaning and anti-icing.
研究领域:
材料科学
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表面工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Jiahang Liu,Jian He,Pan Wu,Chao Yang,Wei Jiang
The preparation of superhydrophobic metal surfaces by one-step immersion in fatty acid solutions is simple and convenient, but the effect of the fatty acid type has not been investigated. In this work, Cu meshes were soaked in ethanol solutions of fatty acids with different carbon chain lengths to obtain surfaces with different wettabilities , which varied from superhydrophilicity to superhydrophobicity. The results showed that the contact angle of the surfaces gradually increased from 2.7 ° for the sample prepared with formic acid to 151.8 ° for the sample prepared with myristic acid. The maximum apparent surface energy and solubility parameter were 82.33 mN/m and 65.79 J 1/2 /cm 3/2 for the C 1 -Cu surface, and the lowest were only 6.3 mN/m and 19.91 J 1/2 /cm 3/2 , respectively, for C 14 -Cu. A simulation confirmed that as the carbon chain length of the fatty acid increased, the solubility parameter decreased, and the hydrophobicity increased. One-step immersion enables facile, inexpensive one-step preparation of membrane surfaces with controllable superhydrophobicity for large-scale industrial applications.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Applied Sciences-Basel
·
2020
·Vol. 10
·期 6
·1985
·
IF 2.474
Jialu Zhang,Hao Xu,Jie Guo,Tianchi Chen,Hongtao Liu
To facilitate the recycling and reuse of cigarette filters and oil/water separation, a superhydrophobic cigarette filter was made by coating with dodecanethiol-modified polypyrrole (Ppy) particles by a dip-coating method. SEM, FTIR, and XPS were used to analyze the surface morphology and chemical compositions. The as-prepared superhydrophobic cigarette filter can realize wettability alteration via changing the ammonium persulfate (APS) concentration from 0.15 mol/L to 3 mol/L, and the contact angle increased from 0° on the original cigarette filter to 155° with a sliding angle of 5°. The superhydrophobic cigarette filter could effectively separate various oils and organic solvents. The separation efficiency was 98.8% and the separation stability was good. Furthermore, the as-prepared superhydrophobic cigarette filter had a large oil absorption range and could absorb different oils and organic solvents, including petroleum ether, engine oil, vegetable oil, n-hexane, and chloroform, with maximum absorption capacities ranging from 9.4 g/g to 22.7 g/g. According to the above results, we believe that the as-prepared superhydrophobic cigarette filter should have great potential in the recovery of solid waste and high-efficiency oil/water separation.Keywords:polypyrrole;superhydrophobicity;oil/water separation;cigarette filter
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Haoyu Wang,Jinghui Wang,Mei Cui,Rongxin Su,Renliang Huang
The oil-absorbent sponge is effective in the prevention and cleanup of offshore oil spills. However, biofouling in marine environments will significantly reduce its oil absorption capacity. Herein, a novel type of antifouling and superhydrophobic polyurethane (PU) sponge was successfully prepared via grafting Econea (antifouling agent) to diisocyanate monomer and hydrophobic modification of PDMS (Polydimethylsiloxane) and SiO 2 . The prepared PDMS-SiO 2 @PU-Econea sponge shows not only super-hydrophobicity with a WCA of 154.5° but also excellent antifouling properties with more than 99% of inhibition to Escherichia coli after immersed in artificial seawater (salinity ≈35‰) for 50 days. It can absorb 133.9 times of trichloromethane than its own weight and still maintain 98.5% of absorption after 50 cycles. In addition, the PDMS-SiO 2 @PU-Econea sponge exhibits excellent continuous oil–water separation performance. The separation fluxes of n-hexane and dichloromethane are 151.0 and 136.3 L·h −1 ·g −1 , respectively, and the oil–water separation efficiency is up to 99.9%, it can absorb 50 times of crude oil than its own weight in 75 s. Therefore, the antifouling and superhydrophobic PDMS-SiO 2 @PU-Econea sponge is a promising and applicable oil absorbent sponge for long-term oil/water separation and cleanup of oil spills in marine environment.
研究领域:
材料科学
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环境科学
·
海洋学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Chenchen Liao,Yingge Li,Meihuan Gao,Yurou Xia,Weihong Chai,Xinying Su,Zaihang Zheng,Yan Liu
Inspired by the super-wetting phenomena in nature, superhydrophobic , fluorine-free and bio-based cotton fabrics with multi-functionality have been prepared by a facile impregnation method. In this work, in situ prepared polydopamine (PDA) was utilized as a binder to adsorb the 8 % flame retardants consisting of ammonium polyphosphate (APP) and β-cyclodextrin (CD) onto the surface of cotton fabric, which was then modified with hydrophobic hexadecyltrimethoxysilane (HDTMS) to change the surface energy. The water contact angle and rolling angle of the cotton fabrics were 154° and 5°, demonstrating excellent self-cleaning capability and oil-water separation efficiency (99 % ± 1 %). Compared with pure cotton fabrics, the multifunctional cotton fabrics had exceptional flame-retardant properties that cannot be ignited. In addition, the cotton fabrics maintained superhydrophobic and flame retardant properties after 600 cm sandpaper friction tests, 7 times oxygen plasma etching-repairing tests, 20 times tape peeling tests, and knife cutting tests. And the multi-functionality mechanism of superhydrophobic cotton fabrics has been illustrated in detail. Consequently, a green and bionic modification presented in this paper via a novel route satisfies the demand for safety and functionality of cotton fabrics in the actual application.
研究领域:
材料科学
·
纺织工程
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环境科学
✓ 已验证
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2021
·Vol. 23
·期 10
·2100347
·
IF 3.862
Jialu Zhang,Hao Xu,Jie Guo,Yingying Zhang,Tianchi Chen
The aerospace industry has extremely strict requirements for metal materials, especially the stability of the material at a low temperature and in harsh environment. Herein, superhydrophobic anti-icing aluminum sheets are fabricated with traditional hydrothermal reaction and modified by (heptadecafluoro-1,1,2,2-tetradecyl) triethoxysilane (AC-FAS). Field-Emission Scanning Electron Microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) are used to analyze the surface morphology and chemical compositions. The satisfactory properties of superhydrophobicity and anti-icing result from its dense microcosmic array structure and its low surface energy. The prepared superhydrophobic aluminum surface can realize wettability alteration, in which the contact angle increases from 118° on the original aluminum sheets to 155° with a rolling angle of 10°. In addition, the prepared superhydrophobic surface has anti-icing and self-cleaning ability. According to the aforementioned results, it is believed that the superhydrophobic aluminum sheets can be an excellent candidate in the aerospace field.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Qun Wang,Binjie Xin,Yifan Wang,Guangtao Zan,Shengyou Li,Kaiying Zhao
Oiled wastewater generated from industrial processes inflicts significant harm on the environment, posting a pressing need for affordable materials that provide prospect for effective oil-water separation and the recovery of valuable oil resources from such wastewater. The incorporation of zeolitic imidazolate framework (ZIF) onto the commercial cotton fabric, due to its porous structure and adjustable properties, offers a promising solution to this challenge. In this work, a cotton fabric with multifunctionalities was designed by in situ growing ZIF-67 onto cotton (ZIF-67@Cotton). The robust superhydrophobic surface was successfully created on ZIF-67@Cotton by combining a self-roughness structure with the modification using a low surface energy agent. This modification imparts versatility, enabling self-cleaning, high-efficiency oil-water separation, and mechanical stability. The resulting ZIF-67@Cotton exhibits a desirable water contact angle (WCA) superhydrophobic characteristic (over 156°), and exceptional resistance to mechanical abrasion during laundering. Notably, this superhydrophobic ZIF-67@Cotton not only efficiently extracts oil from oil/water mixtures with a efficiency over 99.5 % and water-in-oil emulsion (99.3 %) after repeating 20 times but also exhibits superior UV resistance which introduces an innovative approach to develop next-generation multifunctional flexible fabrics featuring superhydrophilic and underwater superoleophobic surfaces.
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
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Linlin Yu,Jiawei Ji,Ruoyu Chen,Qian Jia
Frequent oil spill incidents and increasing amounts of industrial wastewater pose a serious threat to the environment. The use of superhydrophobic materials to separate oil/water mixtures has attracted widespread attention. In this work, a superhydrophobic sponge based on MOF-5 was prepared to achieve efficient continuous oil–water separation and emulsion purification. HDTMS-MOF-5@PDA@MS (H-MOF-5@PDA@MS) not only exhibited superhydrophobic property (WCA = 153.8°, SA = 6.5°) but also exhibited excellent saturated adsorption capacity, with an oil adsorption capacity of 66 (petroleum ether)-168 (chloroform) g/g and oil–water separation efficiency of 99.2%. It also demonstrated efficient performance in various emulsion purification processes. Furthermore, it maintained a stable superhydrophobicity in some extreme environments. H-MOF-5@PDA@MS is expected to have wide application perspective in the fields of environmental pollution control and wastewater treatment due to its low cost, simple process, excellent oil–water separation efficiency, reusability, and environmental friendliness.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiaobing Chen,Ruihang Wen,Gaocan Qi,Hechao Xu,Zhihao Yuan
Lotus leaves usually get the superhydrophobicity from the presence of epicuticular wax on its multilevel micro- and nano-structured surface. It is known that the epicuticular wax is weakly hydrophilic with a contact angle of ∼ 74°, and inorganic elemental sulfur also has a weak hydrophilicity similar to the wax. Inspired by the waxy feature, here we first attempt a superhydrophobicity-harvested strategy by modifying a rough surface with weakly hydrophilic elemental sulfur. The superhydrophobicity of a series of materials including metal hydroxides, oxides, sulfides and chlorides, metals, and even hydrophilic organics, can be achieved by prefabricating their topographic textures combined with elemental sulfur surface modification. DFT calculation suggests that the presence of V S defects on the elemental sulfur coatings can make their rough surfaces have a stronger affinity for O 2 2– than for H 2 O, which allows for the formation of O 2 2– -adsorbed layer on their surface, and thus imbues the hydrophobicity or superhydrophobicity. Our study offers a new and general approach to enhance the surface hydrophobicity via inorganic rather than low surface-energy organic modification.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Ting Dong,Na Tian,Bing Xu,Xiaohua Huang,Shan Chi,Yanming Liu,Ching-Wen Lou,Jia-Horng Lin
Superhydrophobic aerogels are attractive candidates in controlling oil spills. The major challenges for existing aerogels are the construction of mechanical endurance as well as accessible of building materials. Herein, a newfangled biomass superhydrophobic aerogel (M-PCF/CS) with both superior compressibility and oil caption speed is fabricated by assembling poplar catkin fiber (PCF) hollowed-out shell of 330 nm and chitosan (CS) into tubular-lamellar interweaved neurons-like structure. The resultant aerogels (porosity ~ 96.12%), with flexuous PCF as the elastic buffer and second-pore capillaries, exhibit large longitudinal and transverse compressibility , endurable fatigue tolerance, fast oil sorption rate with a capacity of 28.8–78.1 g/g at 5–25 s. In parallel, the aerogels are tolerant of NaCl, UV radiation, and organic solvents without superhydrophobic variation and a case of oil spill remediation via pump-supported experiment shows that the aerogels facilely achieve continuous oil recycling from seawater by 23052–43956 L·m –2 ·h –1 . Furthermore, the resultant M-PCF/CS, with assistance of an oscillator, can be applied to separate oil/water emulsions with efficiency of 98.07–99.11%. The successful fabrication of this material provides a new design strategy for the construction of mechanically robust aerogels for speedy and economical cleanup of oil pollutants from water.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）