Durable superamphiphobic coatings repelling both cool and hot liquids based on carbon nanotubes

Zhai, Naihua; Fan, Leqing; Li, Lingxiao; Zhang, Junping

doi:10.1016/j.jcis.2017.06.050

Cited by 34 publications

(16 citation statements)

References 39 publications

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“…Methods including electrospinning, chemical vapor deposition,[5b,8] and spray‐coating have been used for deposition of nanomaterials. Various synthetic nanomaterials have been used, such as carbon nanotubes, silica nanoparticles, metal oxides, etc. However, only very few natural nanomaterials like clays are used for preparation of superamphiphobic coatings .…”

Section: Introductionmentioning

confidence: 99%

“…However, low sliding angles (SAs) are essential for the unique self‐cleaning property of superamphiphobic surfaces and their applications . Until now, only a few studies have achieved superamphiphobic surfaces with low SAs for liquids of low surface tension by carefully designing the surface topography (e.g., re‐entrant curvatures, overhang structures, and silicone nanofilaments) . Deng et al invented a transparent superamphiphobic coating with low SAs using candle soot as the template .…”

Section: Introductionmentioning

confidence: 99%

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Superamphiphobic Coatings with Low Sliding Angles from Attapulgite/Carbon Composites

Shi

Zhang

et al. 2018

Adv Materials Inter

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Preparation of superamphiphobic coatings with low sliding angles (SAs) for liquids of low surface tension is challenging. Here, a simple and sustainable approach for preparation of superamphiphobic coatings with low SAs from attapulgite/carbon (APT/C) composites is reported. The coatings are prepared by hydrolytic condensation of 1H,1H,2H,2H‐perfluorodecyltriethoxysilane and tetraethoxysilane with the APT/C composites followed by spray‐coating onto substrates. The APT/C composites are prepared by pyrolysis of spent bleaching earth containing APT. The influences of pyrolysis temperature of spent bleaching earth and the APT/C concentration on superamphiphobicity and surface morphology of the coatings are studied. Carbon nanoparticles are formed on the APT nanorods in the pyrolysis process. The APT/C nanorods are wrapped and linked together by a layer of fluorinated polysiloxane (fluoroPOS). The coatings exhibit excellent superamphiphobicity with high contact angles (CAs) and low SAs even for n‐decane (CAn‐decane = 154.2°, SAn‐decane = 11.3°). This is because the new three‐tier micro‐/nano‐/nanostructure is constructed by the combination of APT nanorods, carbon nanoparticles, and fluoroPOS. Also, the superamphiphobic coatings show very good chemical and thermal stability. It is believed that this study will shed light on preparation of superamphiphobic coatings with low SAs via a simple, cost‐effective, and sustainable approach.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superamphiphobic Coatings with Low Sliding Angles from Attapulgite/Carbon Composites

Shi

Zhang

et al. 2018

Adv Materials Inter

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confidence: 99%

“…Previous studies have mainly been focused on the fabrication of hot-water super-repellent surfaces, such as by spray coating, deposition, and electrophoresis-assisted coating, and their applications for self-cleaning and oil/water separation, [7][8][9][10][11][12][13][14][15] whereas only a few studies have reported on wetting mechanisms by hot water. Previous studies have mainly been focused on the fabrication of hot-water super-repellent surfaces, such as by spray coating, deposition, and electrophoresis-assisted coating, and their applications for self-cleaning and oil/water separation, [7][8][9][10][11][12][13][14][15] whereas only a few studies have reported on wetting mechanisms by hot water.…”

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confidence: 99%

“…In contrast to room‐temperature water, hot water complicates the dynamics of liquid wetting and heat transfer with phase change processes, including the evaporation of hot water droplets and condensation of vapor on cold surfaces. Previous studies have mainly been focused on the fabrication of hot‐water super‐repellent surfaces, such as by spray coating, deposition, and electrophoresis‐assisted coating, and their applications for self‐cleaning and oil/water separation, whereas only a few studies have reported on wetting mechanisms by hot water . More recently, it was unveiled that hot‐water droplet bouncing is dramatically affected by the size of surface structure; both nanometric (≈100 nm) and microscale (≈10 µm) features are favorable to hot‐water repellency, while the structure with a dimension in between (≈1 µm) fails at repelling hot water.…”

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confidence: 99%

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Topography‐Directed Hot‐Water Super‐Repellent Surfaces

2019

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Natural and artificial super‐repellent surfaces are frequently textured with pillar‐based discrete structures rather than hole‐based continuous ones because the former exhibits lower adhesion from the reduced length of the three‐phase contact line. Counterintuitively, here, the unusual topographic effects are discovered on hot‐water super‐repellency where the continuous microcavity surface outperforms the discrete microneedle/micropillar surface. This anomaly arises from the different dependencies of liquid‐repellency stability on the surface structure and water temperature in the two topographies. The unexpected wetting dynamics are interpreted by determining timescales for droplet evaporation, vapor condensation, and droplet bouncing. The associated heat transfer process is unique to the wetting states and remarkably distinct from each other in the two topographies. It is envisioned that hot‐water super‐repellent microcavity surfaces will be advantageous for a variety of applications, especially when both self‐cleaning and thermal insulation are imperative, such as clothing for scald protection and digital microfluidics for exothermic reactions.

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Dropwise Condensation by Nanoengineered Surfaces: Design, Mechanism, and Enhancing Strategies

Liu

Wang

Zeng

et al. 2021

Adv Materials Inter

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Condensation is a common heat transfer process widely used in power plants, seawater desalination, and refrigeration industry. Highly efficient condensation is of great importance to save energy, improve operating efficiency of energy systems, and protect the environment. Compared with its filmwise counterpart, dropwise condensation has much higher heat transfer efficiency and is projected as the future condensation process. Various nanoengineered surfaces, including superhydrophobic surfaces, hybrid surfaces with different combinations of surface wettability, and slippery liquid‐infused surfaces, have been designed and applied to sustain and enhance dropwise condensation. In this review, the theories related to surface wetting and liquid mobility are summarized first, followed by an overview of the recent progress on these three major types of nanoengineered surfaces in dropwise condensation. Their contribution to heat transfer enhancement is also discussed, emphasizing on the promotion of nucleation and droplet departure. Given the critical impact of flooding in condensation heat transfer, studies that addressed flooding phenomenon at high subcooling are further reviewed. Various applications that use dropwise condensation surfaces are also summarized. Current challenges in dropwise condensation with nanoengineered surfaces are provided in the end, together with perspectives to accelerate its commercialization.

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Durable superamphiphobic coatings repelling both cool and hot liquids based on carbon nanotubes

Cited by 34 publications

References 39 publications

Superamphiphobic Coatings with Low Sliding Angles from Attapulgite/Carbon Composites

Superamphiphobic Coatings with Low Sliding Angles from Attapulgite/Carbon Composites

Topography‐Directed Hot‐Water Super‐Repellent Surfaces

Dropwise Condensation by Nanoengineered Surfaces: Design, Mechanism, and Enhancing Strategies

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