Stable Superhydrophobic Polybenzoxazine Surfaces over a Wide pH Range

Wang, Chih-Feng; Wang, Yi Ting; Tung, Pao Hsiang; Kuo, Shiao‐Wei; Lin, Chia-Ching; Sheen, Yuung Ching; Feng, Chao

doi:10.1021/la061480w

Cited by 130 publications

(87 citation statements)

References 27 publications

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“…Wang et al 45 fabricated a superhydrophobic copper fatty acid carboxylate surface, and they reported that the surface had stability in observance to organic solvent treatment and exposure to air. Wang et al 17 studied the stability of the superhydrophobic polybenzoxazine surface for all the pH environments. Guo et al 46 tested the durability of SHS after a long time immersion in acid and alkali environments.…”

Section: Durability Of Shsmentioning

confidence: 99%

“…As such, the success of a SHS depends not only on its wetting performances but also on its ability to last over time and resist to erosion and abrasion. 14,15 Nonetheless, only few papers so far have addressed the durability issues, each of them using a different method to assess surface durability, [16][17][18] so that a Assessing durability of superhydrophobic surfaces Malavasi, Bernagozzi, Antonini and Marengo systematic approach to the issue of durability is still lacking in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Assessing durability of superhydrophobic surfaces

Malavasi

Bernagozzi

Antonini

et al. 2015

Surface Innovations

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Superhydrophobic surfaces (SHS) show remarkable water repellency properties, and their use may have a tremendousimpact for a plethora of applications, where liquid water accumulation needs to be controlled or minimised. However, the durability of SHS in operational conditions is a severe issue that currently represents a bottleneck for the technology transfer from laboratory to industrial applications. In the present work, we try to fill in the gap caused by the absence of a standard for evaluation for SHS durability, by developing a protocol for testing surface durability.The proposed protocol includes nine tests as follows: water immersion, acidic environment, alkaline environment, ionic solution, mechanical erosion, ultraviolet exposure, resistance to heating, alcohol immersion and hydrocarbon immersion. The protocol can serve to give an indication of surface robustness in a variety of potentially harmful environments, by providing a global figure of merit and ranking for different SHS and thereby allowing for identifying those surfaces fulfilling requirements for a specific application. To illustrate the protocol, we tested a SHS developed in-house by grafting of lauric acid molecules on an aluminum substrate. This article contains supporting information that is available online.

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Section: Durability Of Shsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessing durability of superhydrophobic surfaces

Malavasi

Bernagozzi

Antonini

et al. 2015

Surface Innovations

View full text Add to dashboard Cite

show abstract

“…After dip-coating with M2 solution, the surface showed a dramatically reduced sliding angle of $60°at 0.05% of ATPS concentration, and then it further jumped to 10°at 0.1%. After then, the concentration increase only slightly reduce this value to 7°at 0.2%, but this value was inversely increased to 16°at 0.3%, This phenomenon is believed to be related to partially lost of the nano-size surface roughness due to over coating of the polymer [42]. Though this change was not clearly verified by SEM study for the sample dip-coating with 0.05-0.3% M2 solution.…”

Section: The Effect Of the Concentration Of M2 Solution On The Superhmentioning

confidence: 86%

“…Although great successes have been made in the preparation of such structures, and superhydrophobic surfaces with an apparent contact angle close to 180°have been prepared from many different techniques [13,31], the successful applications of these manmade superhydrophobic surface are still at the premature stage, mainly due to the lack of facile ways for large scale fabrication and insufficient durability of the prepared superhydrophobic structures [32][33][34][35][36][37]. For example, many superhydrophobic surface are directly built up on metal surfaces [16][17][18][19][20][21], which are not stable in the conditions for many of above mentioned applications because these condition are usually corrosive to metal and can easily destroy the superhydrophobic structures.…”

Section: Introductionmentioning

confidence: 99%

A facile dip-coating process for preparing highly durable superhydrophobic surface with multi-scale structures on paint films

Cui

Yin

Wang

et al. 2009

Journal of Colloid and Interface Science

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“…The first approach was to create a rough structure on a hydrophobic surface, [1,2,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and the second approach was to decrease the surface energy of a rough surface by chemically bonding low surface-energy species to the surface. [9,[20][21][22][23][25][26][27] Several variations of these approaches exist which involve the formation of superhydrophobic surfaces by deposition of micelles of block copolymers, [28] containing polydimethylsiloxane (PDMS) blocks, [29,30] as well as by the use of the LBL deposition of a mixture of polyelectrolyte-particles with further treatment with organosilanes. [30][31][32][33] The surface morphology was generated either by deposition of nanoparticles [29,30,34,35] to enhance the roughness of the coatings or by the treatment with selective solvents which provide, at the same time, surface migration of low surface energy blocks of the block copolymers.…”

mentioning

confidence: 99%

Superhydrophobic Surfaces Generated from Water‐Borne Dispersions of Hierarchically Assembled Nanoparticles Coated with a Reversibly Switchable Shell

et al. 2007

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The objective of this research was the fabrication of superhydrophobic surfaces by deposition (casting) of the aggregates of nanoparticles from water-born solutions with no surfactant application. This approach to superhydrophobic surfaces is important for technologies which avoid organic solvents, surfactants, and applications of complex methods (e.g., lithography, microprinting, micromolding, etc.) for the fabrication of textured functional surfaces. The casting of textured coatings from water-born dispersions is a non-toxic and environmentally friendly method that can be conducted without expensive equipment and tools.The goal of this research was achieved by the fabrication of aqueous dispersions of hybrid responsive nanoparticles. The hybrid particles consisted of a silica core with a grafted mixed block copolymer brush of poly(styrene-block-4-vinylpyridine) P(S-b-4VP) constituting the responsive particle shell. The responsive shell was used to tune and stabilize the secondary aggregates of the particles of the appropriate size and morphology in an aqueous environment. The suspension of the particles formed a textured hydrophilic coating on various substrates upon casting and evaporation of water. Heating the coating above the glass transition temperature of polystyrene (PS) resulted in production of the superhydrophobic material.Superhydrophobic surfaces have received much attention due to their important applications ranging from self-cleaning materials to microfluidic devices. A superhydrophobic surface has a very high advancing water contact angle, typically of 150°or higher, and a very low contact angle hysteresis, that is a very low sliding angle, typically below 15°. [1,2] The wettability of a solid surface is governed by the combination of two factors: the surface chemical composition and the surface texture. [1,[3][4][5][6][7] The surface roughness amplifies the hydrophobic behavior of hydrophobic surfaces due to two possible mechanisms: the Wenzel regime [6] (homogeneous wetting of a rough surface when the wetting liquid (water) penetrates surface cavities) and the Cassie regime [7] (heterogeneous wetting of a rough surface when air is trapped beneath a droplet of water and water escapes from cavities, crevices, and grooves occupied by trapped air). In the Wenzel regime, the water contact angle and the contact angle hysteresis increase with surface roughness resulting in a high roll-off angle. This surface is not a superhydrophobic surface because of the high wetting hysteresis. A low wetting hysteresis is indeed obtained in the Cassie regime for a "composite" surface with trapped air in the surface grooves. The transition between the Wenzel regime and the Cassie regime depends on the intrinsic contact angle, as measured on the reference smooth surface of the same chemical composition as for the rough sample, and the surface texture. McCarthy and Oner [1,2] demonstrated experimentally that the Cassie regime can be approached for characteristic dimensions of surface features of the rough substrate i...

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Stable Superhydrophobic Polybenzoxazine Surfaces over a Wide pH Range

Cited by 130 publications

References 27 publications

Assessing durability of superhydrophobic surfaces

Assessing durability of superhydrophobic surfaces

A facile dip-coating process for preparing highly durable superhydrophobic surface with multi-scale structures on paint films

Superhydrophobic Surfaces Generated from Water‐Borne Dispersions of Hierarchically Assembled Nanoparticles Coated with a Reversibly Switchable Shell

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