Facile Creation of a Bionic Super‐Hydrophobic Block Copolymer Surface

Xie, Qiang; Fan, Genghua; Zhao, Ning; Guo, Xinglin; Xu, Jie; Dong, Jin; Zhang, L.; Zhang, Y.

doi:10.1002/adma.200400074

Cited by 194 publications

(108 citation statements)

References 26 publications

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“…Several groups used strong acid etching, electrochemical etching, and chemical deposition methods. Xie et al 45 reported that formation of artificial superhydrophobic surfaces requires two steps: in the first step, a rough structure with a micro/nano pattern is constructed; and in the second step, the structure is modified by a low-surface-energy substance. Although the above technique exhibits many advantages, they require both the construction of a rough structure and immersion in fluoroalkylsilane (CF 3 (CF 2 ) 7 CH 2 CH 2 Si(OCH 3 ) 3 ) or long-chain complex.…”

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confidence: 99%

Formation of a Corrosion-Resistant and Anti-Icing Superhydrophobic Surface on Magnesium Alloy via a Single-Step Method

Liu

Wang

Chen

et al. 2016

J. Electrochem. Soc.

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A superhydrophobic surface with chemical and long-time stability was fabricated on AZ31 magnesium alloy in a single-step via hydrothermal synthesis to improve corrosion resistance. The as-prepared surface repelled aqueous solutions with a static water contact angle of 156.7 • , and its superhydrophobicity was maintained for more than one year. The superhydrophobic surface showed anti-icing performance in a cold environment. The electrochemical measurement showed the superhydrophobic coating surface improved corrosion resistance for the Mg alloy substrate in 3.5 wt% NaCl solution. In this study, we sought higher efficiency and environmental friendliness to enhance the prospects for application of magnesium alloys. © The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0801605jes] All rights reserved.Manuscript submitted December 10, 2015; revised manuscript received January 25, 2016. Published February 3, 2016 Magnesium alloys are among the lightest and most easily machined metals. Owing to their low density, good electromagnetic screening ability, high strength/weight ratio, low cost, machinability, recyclability and other advantages, Mg alloys are known as the green engineering material of the 21st century.1-3 They are used in many types of applications, such as in the automobile industry, biological materials, aerospace and aircraft fields, and electronic production. [4][5][6] The AZ31 Mg alloy is the most widely used industrial wrought Mg alloy due to its balance of properties and price; it is usually rolled into plate, squeezed into bars or processed by forging.7 However, Mg alloys have shortcomings that limit their application, including low standard potential, high chemical activity, ease of oxidation, low abrasion performance, and susceptibility to corrosion in humid environments. 8 The development of corrosion-resistant Mg alloys will enable a much wider range of applications based on these materials. So far, many approaches have been used for conferring corrosion resistance on magnesium alloy; for example, the control of metallurgical factors by increasing the purity of the alloy, 9 mixing with rare earth elements, 10 or the use of a rapid solidification processing have been investigated.11 Alternative approaches for facilitating corrosion-resistance performance include surface modification by laser processing, the deposition of a protective coating layer by a sol-gel route, anodic oxidation, electroplating and spraying oil paint.12-14 Recently, many studies have shown that superhydrophobic surfaces are effective for conferring corrosion resistance. [15][16][17][18] A solid surface is superhydrophobic if the contact angle (CA) of a water droplet on the surface is larger than 150• . [19][20][21][22] Recent studies have associated superhydrop...

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confidence: 99%

Formation of a Corrosion-Resistant and Anti-Icing Superhydrophobic Surface on Magnesium Alloy via a Single-Step Method

Liu

Wang

Chen

et al. 2016

J. Electrochem. Soc.

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“…[15][16][17][18] Chang's group also utilized the self-assembly of pincushion-like micelle particles of poly(vinylphenol)-block-polystyrene (PVPh-b-PS) to produce superhydrophobic surfaces. [19] Hong et al produced multifunctional films with tunable superhydrophobicity via the layer-by-layer deposition of positively charged polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and negatively charged polystyrene-block-poly(acrylic acid) (PS-b-PAA) micelles onto colloidal particles.…”

Section: Introductionmentioning

confidence: 99%

Spherical Comb Copolymer Micelles and their Application in the Construction of Superhydrophobic Surfaces

Cui

Ding

Scoles

et al. 2010

Macro Chemistry & Physics

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A comb copolymer with a fluorinated FPAE main chain and narrowly dispersed PMS graft chains has been prepared. The micellization behavior of this copolymer in a methanol/acetone mixture was studied. DLS studies showed hydrodynamic diameters of the micelles between 50 and 80 nm, while the diameters of dry micelles were ≈40 nm in TEM images. Micelle films with an interesting porous composite structure of nanofibers bearing micelle particles on the surface have been prepared by double coating the micelle solution. Superhydrophobicity with a WCA of 165° and a sliding angle of 3° was observed. As comb copolymers can adjust their molecular weight and block length independently, materials with a high physical strength and controllable morphological structure can be obtained.magnified image

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“…One is to create micro-/nanostructures on hydrophobic surfaces. Many techniques have been developed to generate rough solid surfaces, including crystallization control [20], phase separation [21,22], template synthesis [23,24], electrochemical deposition [25], and chemical vapor deposition [26]. The other approach is to chemically modify micro-/nanostructured surfaces with materials with low surface free energy [7].…”

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Preparation of superhydrophobic silver nano coatings with feather-like structures by electroless galvanic deposition

et al. 2013

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Superhydrophobic silver nanocoatings with feather-like morphology are fabricated on copper substrates by electroless galvanic deposition. The coating exhibit superhydrophobicity with a contact angle of 156.4° and glide angle of 4° without any further surface modification. Scanning electron microscope (SEM), X-ray diffraction (XRD) and contact angle measurements are used to investigate the morphology, crystal structure and superhydrophobicity, respectively, of the coatings. The coatings exhibit high thermal stability; their water contact angle did not change when the coatings were heated to 200°C for 2 h. The mechanism of superhydrophobicity of the silver coating is discussed based on the work of Amirfazli, Wenzel and Cassie. The wettability of a solid surface is a very important interfacial behavior. Recently, superhydrophobic surfaces have attracted great interest because of their potential for application in the fields of water repellency, antisticking, self-cleaning and antifouling [1][2][3][4][5][6][7][8]. Wettability is normally characterized by measurement of the contact angle (CA) of a surface. Generally, surfaces with water contact angles larger than 150° and slide angles lower than 10° are called superhydrophobic [9,10]. In nature, many plants and insects have evolved to exhibit perfect superhydrophobicity; for example, the lotus leaf [7,11], water-strider legs [12], the hind wings of the waterman [13], cicadae [14], termite wings and backs of beetles [15,16]. Research has revealed that the dual-scale hierarchical structures of natural surfaces can not only ensure practical superhydrophobic performance but also provide mechanical durability [17]. Inspired by the fascinating functions of such structures in nature [18,19], two kinds of approaches have been proposed to artificially fabricate superhydrophobic surfaces. One is to create micro-/nanostructures on hydrophobic surfaces. Many techniques have been developed to generate rough solid surfaces, including crystallization control [20], phase separation [21,22], template synthesis [23,24], electrochemical deposition [25], and chemical vapor deposition [26]. The other approach is to chemically modify micro-/nanostructured surfaces with materials with low surface free energy [7]. Such materials include fluoroalkylsilane [27], fluoropolymers [28], organic polymers [29], and alkylketene dimers [30]. However, most of the techniques described above require multiple steps, specific substrates, special equipment or harsh chemical treatment, which seriously hinder the practical application of superhydrophobic materials. In this paper, we present a simple method to fabricate large-area superhydrophobic silver coatings on unmodified copper substrate. The structure and superhydrophobicity of the silver coating can be controlled simply by adjusting the initial concentration of silver nitrate and reaction time.

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Facile Creation of a Bionic Super‐Hydrophobic Block Copolymer Surface

Abstract: A super‐hydrophobic surface (see Figure), possessing a microscale and nanoscale hierarchical structure similar to the surface structure of the lotus leaf, was prepared in one step from a micellar solution of polypropylene‐block‐poly(methyl methacrylate).

Cited by 194 publications

References 26 publications

Formation of a Corrosion-Resistant and Anti-Icing Superhydrophobic Surface on Magnesium Alloy via a Single-Step Method

Formation of a Corrosion-Resistant and Anti-Icing Superhydrophobic Surface on Magnesium Alloy via a Single-Step Method

Spherical Comb Copolymer Micelles and their Application in the Construction of Superhydrophobic Surfaces

Preparation of superhydrophobic silver nano coatings with feather-like structures by electroless galvanic deposition

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