APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zhiqiang Yu,Zhiyong Ji,Dihao Tao,Qiaoxin Zhang,Rong Liu
A simple, efficient and low-cost method is proposed to prepare surfaces with reversible superwettability and excellent corrosion resistance. Superhydrophobic surfaces are successfully obtained on the copper alloys by etching, heat treatment, and then stearic acid modification, exhibiting extraordinary water repellence with a static contact angle of 159.7 ± 1.2°, and a sliding angle of 3.1 ± 0.6°. The reversible transition of the superwetting state are successfully achieved. The surface can be turned into a superhydrophilic state by simple heat treatment. And then, it can be turned into a superhydrophobic state by re-modification. Meanwhile, the effects of etching time and heat treatment temperature on wettability are also studied. Finally, the corrosion resistance of the copper alloys and the durability under various extreme conditions are investigated. The results show that the prepared superhydrophobic copper alloys have excellent corrosion resistance with a corrosion inhibition rate of 98.83% and superior durability, which will further expand its practical applications.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Anhui Yu,Zhiguang Guo
The directional transport and precise control of droplets and bubbles are crucial for future applications, but remain challenging due to complex fluid dynamics and application limits. In light of existing research on droplet manipulation, a MnO 2 /carbon microsphere (MnO 2 /Cs) covalently grafted lubricant-infused slippery surface (SPM) is designed for the manipulation of droplets and bubbles. The structure and morphology of the MnO 2 /Cs are examined using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM), and the elemental composition and chemical bonds of the compounds are characterized by X-ray photoelectron spectroscopy (XPS), Raman spectra and Fourier transform infrared spectrometer (FTIR). The SPM with a sliding angle as low as 3° is prepared. On the SPM, the rapid transportation and precise control of small droplets can be achieved, with the transportation speed of 5 µL droplets reaching 1 mm s −1 and the round-trip control of droplets also being feasible. The surface is capable of controlling the speed of a 100 µL droplet with a precision of 0.49 mm s −1 , while a 50 µL droplet can be directed with a load of 1 mg. Moreover, bubbles with a volume of 5 to 20 µL can also be transported.
研究领域:
材料科学
·
流体力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 29
·19457-19464
·
IF 4.493
Ganwei Zhang,Jiwen Hu,Yuanyuan Tu,Guping He,Fei Li,Hailiang Zou,Shudong Lin,Gonghua Yang
The diblock copolymer poly[2,2,2-trifluoroethyl methacrylate-r-styrene]-block-poly[(2-cinnamoyloxyethyl methacrylate)] [P(TFEMA-r-Sty)-b-PCEMA] was synthesized via atom transfer radical polymerization. The copolymer underwent self-assembly in TFEMA/CH2Cl2 to form spherical micelles. Photo-cross-linking of the PCEMA domains of these micelles yielded cross-linked nanoparticles. The cross-linked nanoparticles were subsequently cast from CH2Cl2/methanol solvent mixtures at methanol volume fractions of more than 30% to yield rough surfaces bearing small nanobumps on micron-sized aggregations that were connected together to form cross-linked nanoparticles. These surfaces were superhydrophobic with a water contact angle of 161 ± 1° and a sliding angle of 6 ± 1°. Spraying these nanoparticles onto substrates exhibiting microscale roughness, such as filter paper, by a traditional coating technique also created superhydrophobic surfaces. A thin layer of nanoscale spherical protrusions was observed on the microscale fibers of filter paper by scanning electron microscopy. The coated filter paper samples exhibited a water contact angle and a sliding angle of 153 ± 1° and 9 ± 1°, respectively.
研究领域:
高分子化学
·
材料科学
·
表面科学
·
纳米技术
·
功能材料
✓ 已验证
DOI
高影响因子
Micromachines
·
2024
·Vol. 15
·期 9
·1088
·
IF 3
Haonan Li,Muyang Zhang,Yeqian Liu,Shangneng Yu,Xionghui Li,Zejingqiu Chen,Zitao Feng,Jie Zhou,Qinghao He,Xinyi Chen,Huiru Zhang,Jiaen Zhang,Xingwei Zhang,Weijin Guo
Superhydrophobic surfaces have been used in various fields of engineering due to their resistance to corrosion and fouling and their ability to control fluid movement. Traditionally, superhydrophobic surfaces are fabricated via chemical methods of changing the surface energy or mechanical methods of controlling the surface topology. Many of the conventional mechanical methods use a top-to-bottom scheme to control the surface topolopy. Here, we develop a novel fabrication method of superhydrophobic substrates using a bottom-to-top scheme via polymer OSTE, which is a prototyping polymer material developed for the fabrication of microchips due to its superior photocuring ability, mechanical properties, and surface modification ability. We fabricate a superhydrophobic substrate by OSTE–OSTE micro mushroom forest via a two-step lithography process. At first, we fabricate an OSTE pillar forest as the mushroom stems; then, we fabricate the mushroom heads via backside lithography with diffused UV light. Such topology and surface properties of OSTE render these structures superhydrophobic, with water droplets reaching a contact angle of 152.9 ± 0.2°, a sliding angle of 4.1°, and a contact angle hysteresis of less than 0.5°. These characteristics indicate the promising potential of this substrate for superhydrophobic applications.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Fei Lu,Guangzhou Liang,Min Wang,Binbin Zhang
Superhydrophobic materials exhibit unique non-wetting and low surface energy properties, rendering them promising for diverse applications. However, their hierarchical micro/nanostructures induce pronounced light scattering, which drastically compromises optical transparency. Consequently, the development of highly transparent superhydrophobic materials remains a critical challenge in this field. In this study, we developed a transparent superhydrophobic coating using waterborne polyurethane (WPU) and fluorosilane-modified silicon dioxide (F-SiO 2 ) nanoparticles. The coating exhibits a water contact angle (WCA) of 155.9 ± 0.2° and a sliding angle (SA) of 0.9 ± 0.2°. Beyond its superhydrophobicity, more importantly, the coating demonstrates exceptionally high optical transparency, with light transmittance only 1.2 % lower than that of the bare glass substrate. Additionally, the coating shows outstanding self-cleaning, liquid repellency, acidic/alkaline droplets resistance, water droplet impact resistance, and anti-bacterial properties. After 6 h of anti-bacterial test, the coating achieved a 100 % anti-bacterial rate against both E. coli and S. aureus . Even after 12 h exposure, the anti-bacterial rates remained as high as 98.6 ± 0.4 % and 98.3 ± 0.7 % against E. coli and S. aureus , respectively. We believe the development of such a multifunctional transparent superhydrophobic coating provides a promising protective material for applications such as underwater observation windows, offshore photovoltaics, medical equipment, food packaging, etc.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
光学涂层
·
生物医用材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Hao Li,Sirong Yu
A hierarchical surface was fabricated by electrodeposition of copper coating and chemical oxidation to form copper oxide, and the surface energy was lowered by chemical modification. The optimum parameters including seven days of chemical modification, 0.12 mol/L of (NH 4 ) 2 S 2 O 8 , 2.5 mol/L of KOH and 60 °C of oxidation temperature were used to fabricate the superhydrophobic surface with a water contact angle up to around 160° and a sliding angle about 3° on a steel substrate. Silver mirror effect and simple calculation showed that the wetting state between a water droplet and the hierarchical superhydrophobic surface was the Cassie state. This superhydrophobic surface had excellent self-cleaning properties for two different sizes (∼ 50 μm and 150 μm) of fly-ash cenospheres, and we gave the reason for its self-cleaning properties by the force involved at the interface. We also investigated the dynamics of water droplets impinging onto the superhydrophobic surface with different impact velocities, ranging from 0.31 m/s to 1.71 m/s, and found that all the water droplets could rebound from the superhydrophobic surface, with no trace of adhesion. In addition, a variety of tests were performed to assess the robustness of the superhydrophobic surfaces.
研究领域:
材料科学
·
表面化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 4
·1-10
·
IF 2.983
Li Lin,Shi Tao,Zhang Yuan,Ma Xiaoyong,Xue Sen,Li Wenyan,Peng Huaqiao,Wei Yongqiang,Zhang Aimin,Zhao Chengshou
Superhydrophobic aluminum alloy is fabricated through a chemical etching combined with surface modification. The surface modification step consists of a cyclic assembly of phytic acid (PA) and a metal ion (Ce or Fe) followed by surface modification with a low-surface-energy material (perfluorooctyltriethoxysilane, PFTS). With the optimized fabrication parameter, the sample integrated with Ce ion, denoted as Al-PA-Ce-PFTS, shows the best superhydrophobicity with CA of 169.6° ± 0.8° and SA of < 1°, followed by the sample integrated with Fe ion, denoted as Al-PA-Fe-PFTS (CA = 164.9° ± 2.1° and SA < 1°). Both samples determine excellent non-wettability. Through studying the dynamic behavior of water droplets on the surfaces of Al-PA-Ce-PFTS and Al-PA-Fe-PFTS, it reveals that both samples show excellent anti-adhesion ability. Electrochemical tests with 3.5 wt.% NaCl solution indicates that the anti-corrosion performance of superhydrophobic aluminum alloy surfaces is much better than that of the untreated aluminum surface. The freezing of water droplets on Al-PA-Ce-PFTS and Al-PA-Fe-PFTS is much slower than that of the untreated aluminum surface. Some water droplets can remain unfrozen at − 5 °C for over 60 min on the surfaces of Al-PA-Ce-PFTS and Al-PA-Fe-PFTS.
研究领域:
材料科学
·
表面化学
·
腐蚀工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2012
·Vol. 62
·期 3
·424-431
·
IF 1.632
Liu W. L.,Wang L.,Zhang L. D.,Xu W. H.,Chen S. H.,Wang X. Q.,Duan X. L.
Abstract The organic–inorganic nanocomposite films were fabricated by grafting polystyrene (PS) onto the vinyltriethoxysilane (VTEOS) modified titanium dioxide nanopowders using free radical polymerization. The composition of the surfaces and the structure for the PS grafted titania (PS-g-TiO 2 ) were examined by infrared spectroscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis, and the rough surface was confirmed by the evaluation of the morphological characteristics of the coating using hybrid particles. The wetting properties of the VTEOS modified titania and PS-g-TiO 2 films were investigated, which show the maximum static water contact angles of 160° and 154°, and minimum sliding angles of 3° and 4°, respectively. Graphical Abstract
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Mingjie Li,Wenxin Luo,Haoyang Sun,Jingfu Xu,Kar Wei Ng,Xing Cheng
Superhydrophobic metallic surfaces with mechanical stability as well as self-cleaning and anticorrosion functions are highly desirable because of their promising applications in various aspects. Large apparent water contact angles (≥150°) on metal surfaces are usually realized by high surface roughness and low surface energy. However, rough nanoscale features and low-energy coatings are prone to wear, causing degradation of the local wetting property during service. Herein, we develop a low-cost and scalable fabrication methodology to prepare composite superhydrophobic surfaces (water contact angle ∼154.7± 2.3° and sliding angle ∼1.2 ± 0.2°) by integrating a micropatterned amorphous alloy frame with functionalized nanoparticles. Amorphous interconnected microwalls provide augmented resistance against abrasion, whereas spray-coated nanomaterials residing within the frame impart water repellency. Metallic surfaces can withstand abrasion against sandpaper for 40 m under a local pressure of 120 kPa, before losing their perfect superhydrophobic performances. The composite surfaces also maintain its water repellency after mechanical bending, knife scratching, water impact jetting, ultraviolet (UV) irradiation, and acid immersion. We envisage that the design strategies here provide a practical route to manufacture water-repellent surfaces with metallic glass in harsh nautical applications.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Zhonglong Wang,Aibi Yang,Xinyu Tan,Yiteng Tu,Sydney Sabin,Peng Xiang,Man Wang,Runhua Guo,Xiaobo Chen
Superhydrophobic (SHP) coatings have been reported with many promising applications using various nano-micro structures with surfactants of low surface energies. However, many SHP coatings have poor durability, largely limiting their practical importance. In this study, a durable SHP coating is demonstrated with a novel veil-over-sprout micro-nano structure of silica nano particles (SNP) and poly(methyl methacrylate) (PMMA). This coating displays a large water contact angle (WCA) of 168.0° and a small sliding angle (SA) of less than 1.0°. Excellent abrasion resistance is demonstrated with excellent superhydrophobicity (WCA = 159.0°) after consecutive tests with sandpaper, high-density water flow and fine sand impact. An excellent self-healing function has been achieved with this SHP coating after stored at room temperature , recovering its remarkable superhydrophobicity. Outstanding resistance against ice formation is exhibited with the starting-freezing time at −20 ℃ three times longer than uncoated surface. Strong resistance to acid and base attacks is observed even after a week of immersion in highly acidic and alkaline environments (pH 1.0–14.0), without much degradation of SHP performance. Efficiency of up to 99.9% is demonstrated in corrosion protection in a solution with pH = 10.0 to extend the life of the metal. In addition, remarkable SHP durability is demonstrated after long-term outdoor exposure. Therefore, this work has shown off a promising methods for SHP coatings towards future practical applications.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
涂层与薄膜
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2020
·
IF 6.444
Buyong Wu,Lin Ye,Zhao Zhang,Xiaowen Zhao
A robust super-hydrophobic coating was constructed on the surface of urea–formaldehyde (UF) foams through a facile immersion process in SiO 2 nanoparticle-dispersed ethanol solution with dodecyltrimethoxysilane (DTMS) as compatibilizer . By introduction of DTMS, strong hydrogen bonding interaction formed between SiO 2 coating and UF foam. The UF-g-SiO 2 /DTMS foam showed a water contact angle (CA) of 157.2° and a sliding angle (SA) of 3°, and after long-term immersion, very slight change of CA and SA was observed, while the water absorption ratio was 36.89% lower than that of pristine sample, displaying durable super-hydrophobicity. The UF-g-SiO 2 /DTMS foam showed excellent self-cleaning ability. Introduction of DTMS improved the dispersion of SiO 2 in solution and thus lots of bamboo shoot-shaped granular protrusions of SiO 2 nanoparticles at micro/nano-scale formed on the foam surface during treatment process, while the strong interfacial interaction prevented SiO 2 nanoparticles from falling off the foam after long-term immersion, and thus durable hydrophobicity was achieved.
研究领域:
材料科学
·
表面化学
·
纳米技术
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Kang Fu,Yi Tian,Zongting Zhu,Guoxian Zhang,Junjian Xie,Qiuyu Zhang
Without a fragile micro/nanostructure, omniphobic coatings have a natural advantage over superomniphobic coatings in mechanical durability, especially when confronted with finger wipes and squeezes in practical use. Many reported omniphobic coatings with lower liquid sliding angles showed better ink trace resistance. However, according to our results, these two properties are not positively related. The respective critical factors for lowering the liquid sliding angle and resisting tiny contaminants, such as ink stroke and fingerprint, remain elusive. Through three steps of the thiol-click reaction, a surface-dried, highly transparent, mechanically and chemically robust, fluorinated polyurethane coating was photocured efficiently. Surfaces that exhibited better sliding performance but worse resistance to ink stroke and fingerprint were reported. Our results indicate that a heavy cross-linked structure was beneficial for the resistance to tiny contaminants, while the liquid sliding performance only depended on the surface fluorine content, especially the surface enrichment of flexible low-surface-tension chains. Interestingly, an unexpected transformation from a turbid dispersion to a transparent solution during the preparation was observed. The efficient thiol-click reaction induces a micelle-like structure to open and imparts high transparency to the final coatings. Therefore, this work provides useful information to facilitate the study of omniphobic coatings, as well as a good candidate in anti-graffiti applications.
研究领域:
材料科学
·
表面化学
·
聚合物科学
·
涂料技术
✓ 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）