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Huang TE, Lu Y, Wei Z, Li D, Li QY, Wang Z, Takahashi K, Orejon D, Zhang P. Ultrahigh Subcooling Dropwise Condensation Heat Transfer on Slippery Liquid-like Monolayer Grafted Surfaces. ACS APPLIED MATERIALS & INTERFACES 2024; 16:53285-53298. [PMID: 39295174 DOI: 10.1021/acsami.4c12220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2024]
Abstract
Rapid and continuous droplet shedding is crucial for many applications, including thermal management, water harvesting, and microfluidics, among others. Superhydrophobic surfaces, though effective, suffer from droplet pinning at high subcooling temperature (Tsub). Conversely, slippery liquid-like surfaces covalently bonded with flexible hydrophobic molecules show high stability and low droplet adhesion attributed to their dense and ultrasmooth water repellent polymer chains, enhancing dropwise condensation and rapid shedding. In this work, linear poly(dimethylsiloxane) chains of various viscosities are covalently bonded onto silicon substrates to form thin and smooth monolayer coated surfaces. The formation of the monolayer is characterized by cryogenic transmission electron microscopy. On these surfaces a very low contact angle hysteresis is reported within wide surface temperature ranges as well as continuous dropwise condensation at ultrahigh Tsub of 60 K. In particular, one of the highest condensation heat fluxes of 1392.60 kW·m-2 and a heat transfer coefficient of 23.21 kW·m-2·K-1 at ultrahigh Tsub of 60 K is reported. The experimental heat transfer performance is further compared to the theoretical heat transfer via the individual droplets with the droplet distribution elucidated via both macroscopic observations as well as environmental scanning electron microscopy. Finally, only a mild decrease in the heat transfer coefficient of 20.3% after 100 h of condensation test at Tsub of 60 K is reported. Slippery liquid-like surfaces promote droplet shedding and sustain dropwise condensation at high Tsub without flooding empowered by the lower frictional forces, addressing challenges in heat transfer performance and durability.
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Affiliation(s)
- Ting-En Huang
- Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Yisheng Lu
- Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Zhaozhuo Wei
- Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Dawei Li
- Department of Aeronautics and Astronautics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Qin-Yi Li
- Department of Aeronautics and Astronautics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Zhenying Wang
- Department of Aeronautics and Astronautics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Koji Takahashi
- Department of Aeronautics and Astronautics, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Daniel Orejon
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
- Institute for Multiscale Thermofluids, School of Engineering, The University of Edinburgh, Edinburgh EH9 3FD Scotland, United Kingdom
| | - Peng Zhang
- Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
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Liu S, Huang Q, Gao R, Yuan G, Li N, Liu Y, Zhang X, Chen Y, Wang M. Patterned Ultraslippery Surfaces of Stainless Steel Prepared by Femtosecond Laser Ablation for Directional Manipulation of Liquid Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:20763-20772. [PMID: 39287408 DOI: 10.1021/acs.langmuir.4c02915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Slippery liquid-infused porous surfaces (SLIPS) have promising applications in chip laboratories, nanofriction power generation, and microfluidics due to their excellent properties such as good hydrophobicity and low adhesion. However, the self-driven stability of conventionally lubricated surfaces is not high, and the velocity of liquid droplets is difficult to regulate. This greatly limits the potential applications of SLIPS. A strategy is offered to prepare microporous structures of SLIPS directly on a stainless-steel substrate using femtosecond laser processing technology as the main means to realize exhibiting smoothness to liquids. At the same time, the principle of bionics is utilized, the porous structure of SLIPS is combined with the groove structure of rice leaves, or porous structures are combined with the wedge structure of shorebird beak to prepare the three-dimensional structure of SLIPS. Droplets exhibit significant individual anisotropy on three-dimensional (3D) SLIPS of leaf-like groove stripe structure in rice, enabling the precise control of droplet motion direction. When droplets are transported in wedge-shaped SLIPS with an asymmetric structure, the wedge edge can limit the direction of droplet motion while squeezing the droplet to generate Laplace pressure gradient, which achieves continuous self-driven transport of droplets. In addition, based on the above two processing strategies, an information transfer device is designed: the splicing of the self-driven transport surface with anisotropic topological channels enables the differential drive for liquid transport, which provides the conditions for the information transfer of the droplets. This strategy not only is simple and efficient but also provides new ideas for the effective development of multifunctional SLIPS as well as lab-on-a-chip and microfluidic domains.
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Affiliation(s)
- Shengkai Liu
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Qingyi Huang
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Ruming Gao
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Guangli Yuan
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Nana Li
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Yiting Liu
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Xuhui Zhang
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Yulong Chen
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Meng Wang
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
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Cheng X, Zhao R, Wang S, Meng J. Liquid-Like Surfaces with Enhanced De-Wettability and Durability: From Structural Designs to Potential Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2407315. [PMID: 39058238 DOI: 10.1002/adma.202407315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 07/16/2024] [Indexed: 07/28/2024]
Abstract
Liquid-like surfaces (LLSs) with dynamic repellency toward various pollutants (e.g., bacteria, oil, and ice), have shown enormous potential in the fields of biology, environment, and energy. However, most of the reported LLSs cannot meet the demands for practical applications, particularly in terms of de-wettability and durability. To solve these problems, considerable progress has been made in enhancing the de-wettability and durability of LLSs in complex environments. Therefore, this review mainly focuses on the recent progress in LLSs, encompassing designed structures and repellent capabilities, as well as their diverse applications, offering greater insights for the targeted design of desired LLSs. First, a detailed overview of the development of LLSs from the perspective of their molecular structural evolution is provided. Then highlight recent approaches for enhancing the dynamic de-wettability and durability of LLSs by optimizing their structural designs, including linear, looped, crosslinked, and hybrid structures. Later, the diverse applications and unique advantages of recently developed LLSs, including repellency (e.g., liquid anti-adhesion/transportation/condensation, anti-icing/scaling/waxing, and biofouling repellency) are summarized. Finally, Perspectives on potential innovative advancements and the promotion of technology selection to advance this exciting field are offered.
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Affiliation(s)
- Xiaopeng Cheng
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, 256606, P. R. China
| | - Ran Zhao
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shutao Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jingxin Meng
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, 256606, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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4
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Sun J, Li L, Zhang R, Jing H, Hao R, Li Z, Xiao Q, Zhang L. Comparative Molecular Dynamics Simulation of Wetting on Liquid-like Surfaces. J Phys Chem B 2024; 128:7871-7881. [PMID: 39083569 DOI: 10.1021/acs.jpcb.4c02513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
We utilize molecular dynamics simulations to comparably investigate the wetting and motion behavior of droplets on liquid-like surfaces (LLS) with varying grafting conditions. Polydimethylsiloxane (PDMS) and perfluoropolyether (PFPE) have been considered to be flexible molecules versus rigid molecules of trichloro(octadecyl) silane (OTS) and trichloro(1H,1H,2H,2H-perfluorooctyl) silane (PFOS), respectively. Our findings reveal that droplets on surfaces tethered with either PDMS or PFPE brushes can generate indentations and wetting ridges, providing microscopic evidence of their liquid-like nature. The grafting density of mobile chains exerts a dominant influence on the wetting properties compared to the molecular weight. A parameter map is created to pinpoint the precise range of grafting densities essential for the optimal construction of LLS at predetermined molecular weights. Furthermore, the investigation of droplet motion dynamics on LLS demonstrates that droplets consistently exhibit a rolling state, regardless of the intensity of the applied lateral force. The movement pattern of the droplet shifts only under conditions where the grafting density is significantly reduced and the substrate exhibits hydrophilic tendencies. These findings and the developed model are anticipated to offer valuable guidelines for optimal designs of LLS.
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Affiliation(s)
- Jining Sun
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China
| | - Lizhong Li
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ranlong Zhang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hao Jing
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ruonan Hao
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhiyuan Li
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Qianhao Xiao
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Lei Zhang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China
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5
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Zhang R, Ding Z, Wang K, Zhang H, Li J. Enhanced Anti/De-Icing Performance on Rough Surfaces Based on The Synergistic Effect of Fluorinated Resin and Embedded Graphene. SMALL METHODS 2024; 8:e2301262. [PMID: 38227388 DOI: 10.1002/smtd.202301262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/25/2023] [Indexed: 01/17/2024]
Abstract
Icing negatively impacts various industrial sectors and daily life, often leading to severe safety problems and substantial economic losses. In this work, a fluorinated resin coating with embedded graphene nanoflakes is prepared using a spin-coating curing process. The results shows that the ice adhesion strength is reduced by ≈97.0% compared to the mirrored aluminum plate, and the icing time is delayed by a factor of 46.3 under simulated solar radiation power of 96 mW cm-2 (1 sun) at an ambient temperature of -15 °C. The superior anti/de-icing properties of the coating are mainly attributed to the synergistic effect of the fluorinated resin with a low surface energy, the rough structure of the sandblasted aluminum plate, which reduces the contact area, and the embedded graphene nanoflakes with a superior photothermal effect. Furthermore, the hydrogen bonding competition effect between the exposed-edge oxygen-containing functional groups of the embedded graphene nanoflakes and water molecules further improves the anti-icing properties. This work proposes a facile preparation method to prepare coatings with excellent anti/de-icing properties, offering significant potential for large-scale engineering applications.
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Affiliation(s)
- Rui Zhang
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, 100084, P. R. China
| | - Zhengmao Ding
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, 100084, P. R. China
| | - Kaiqiang Wang
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, 100084, P. R. China
| | - Hanli Zhang
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, 100084, P. R. China
| | - Jinjin Li
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, 100084, P. R. China
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Dou Y, Wu C, Fan Y, Wang Y, Sun Z, Huang S, Yang Y, Tian X. Anti-fogging/dry-dust transparent superhydrophobic surfaces based on liquid-like molecule brush modified nanofiber cluster structures. J Colloid Interface Sci 2024; 664:727-735. [PMID: 38492374 DOI: 10.1016/j.jcis.2024.03.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/08/2024] [Accepted: 03/12/2024] [Indexed: 03/18/2024]
Abstract
Transparent protective coatings capable of preventing fog and dust accumulation have broad application prospect in photovoltaic systems, optical devices and consumer electronics. Although a number of superhydrophobic coatings have been developed for self-cleaning purpose over the past three decades, there is still a lack of surfaces that can simultaneously possess high transparency, remarkable superhydrophobicity, and excellent fog and dust resistance. In this study, we have prepared surfaces featuring sub-wavelength nanofiber cluster structures through a facile plasma etching method, and further modified the surface with liquid-like perfluoropolyether (PFPE) brushes. The prepared PFPE modified nanofibrous surface (PFPE-NS) exhibits superior optical transparency (transmittance 90.4 % ± 0.7 %) and water repellency, with a water contact angle as high as 171.0° ± 0.6° and sliding angle down to 0.5° ± 0.1° (5 µL). More importantly, benefitted from the nanofiber cluster structures and the slippery liquid-like surface chemistry, the adhesion and accumulation of fog droplets and dust particles on PFPE-NS is greatly inhibited. As a consequence, PFPE-NS can keep excellent optical clearness after 2 h fogging test and maintain an average transmittance above 87 % after 24 h dusting test. Our study provides a promising strategy through constructing liquid-like nanofibrous coating for optical protection that could be applicable in practical rainy, foggy, and dusty environments.
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Affiliation(s)
- Yingying Dou
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China; State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry of CAS, Urumqi 830011, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chengjiao Wu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Yue Fan
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Yingke Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhe Sun
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Shilin Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Yabin Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China.
| | - Xuelin Tian
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China.
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7
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Ma J, Zhang C, Zhang P, Song J. One-step synthesis of functional slippery lubricated coating with substrate independence, anti-fouling property, fog collection, corrosion resistance, and icephobicity. J Colloid Interface Sci 2024; 664:228-237. [PMID: 38461789 DOI: 10.1016/j.jcis.2024.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 03/05/2024] [Accepted: 03/05/2024] [Indexed: 03/12/2024]
Abstract
Ranging from industrial facilities to residential infrastructure, functional surfaces encompassing functionalities such as anti-fouling, fog collection, anti-corrosion, and anti-icing play a critical role in the daily lives of humans, but creating these surfaces is elusive. Bionic dewetting and liquid-infused surfaces have inspired the exploitation of functional surfaces. However, practical applications of these existing surfaces remain challenging because of their inherent shortcomings. In this study, we propose a novel functional slippery lubricated coating (FSLC) based on a simple blend of polysilazane (PSZ), silicone oil, and nano silica. This simple, nonfluorine based, and low-cost protocol promotes not only hierarchical micro-nano structure but also favorable surface chemistry, which facilitates robust silicone oil adhesion and excellent slippery properties (sliding angle: ∼1.6°) on various solid materials without extra processing or redundant treatments. The highly integrated competence of FSLC, characterized by robustness, durability, strong adhesion to substrates, and the ability for large-area preparation, render them ideal for practical production and application. The proposed FSLC holds outstanding application potentials for anti-fouling, self-cleaning, fog collection, anti-corrosion, and anti-icing functionalities.
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Affiliation(s)
- Jun Ma
- State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, PR China; Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning 116024, PR China; Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Chen Zhang
- State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, PR China; Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning 116024, PR China
| | - Peng Zhang
- Water Desalination and Reuse Center, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Jinlong Song
- State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, PR China; Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning 116024, PR China.
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8
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Zhang Y, Wang L, Zhao X, Yang H, Liu J, Wang J. A simple fabrication of liquid-like polydimethylsiloxane coating for resisting ice adhesion. J Chem Phys 2024; 160:084703. [PMID: 38391021 DOI: 10.1063/5.0188199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/05/2024] [Indexed: 02/24/2024] Open
Abstract
The rapid realization of efficient anti-icing coatings on diverse substrates is of vital value for practical applications. However, current approaches for rapid preparations of anti-icing coatings are still deficient regarding their surface universality and accessibility. Here, we report a simple processing approach to rapidly form icephobic liquid-like polydimethylsiloxane (PDMS) brushes on various substrates, including metals, ceramics, glass, and plastics. A poly(dimethylsiloxane), trimethoxysilane is applied as a reactant under the catalysis of a minimal amount of acid formed by hydrolysis of dichlorodimethylsilane. With such an advantage, this approach is approved to be applicable of coating metal surfaces with less corrosion. The distinctive flexibility of the PDMS chains provides a liquid-like property to the coating showing low contact angle hysteresis and ice adhesion strength. Notably, the ice adhesion strength remains similar across a wide temperature window, from -70 to -10 °C, with a value of 18.4 kPa. The PDMS brushes demonstrate perfect capability for resisting acid and alkali corrosions, ultra-violet degradation, and even tens of icing/deicing cycles. Moreover, the liquid-like coating can also form at supercooling conditions, such as -20 °C, and shows an outstanding anti-icing/deicing performance, which meets the in situ coating reformation requirement under extreme conditions when it is damaged. This instantly forming anti-icing material will benefit from resisting instantaneous ice accretion on surfaces under extremely cold conditions.
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Affiliation(s)
- Yixuan Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Lei Wang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xueying Zhao
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Huige Yang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Jie Liu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jianjun Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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9
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Yan X, Au SCY, Chan SC, Chan YL, Leung NC, Wu WY, Sin DT, Zhao G, Chung CHY, Mei M, Yang Y, Qiu H, Yao S. Unraveling the role of vaporization momentum in self-jumping dynamics of freezing supercooled droplets at reduced pressures. Nat Commun 2024; 15:1567. [PMID: 38378825 PMCID: PMC10879204 DOI: 10.1038/s41467-024-45928-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 02/06/2024] [Indexed: 02/22/2024] Open
Abstract
Supercooling of water complicates phase change dynamics, the understanding of which remains limited yet vital to energy-related and aerospace processes. Here, we investigate the freezing and jumping dynamics of supercooled water droplets on superhydrophobic surfaces, induced by a remarkable vaporization momentum, in a low-pressure environment. The vaporization momentum arises from the vaporization at droplet's free surface, progressed and intensified by recalescence, subsequently inducing droplet compression and finally self-jumping. By incorporating liquid-gas-solid phase changes involving vaporization, freezing recalescence, and liquid-solid interactions, we resolve the vaporization momentum and droplet dynamics, revealing a size-scaled jumping velocity and a nucleation-governed jumping direction. A droplet-size-defined regime map is established, distinguishing the vaporization-momentum-dominated self-jumping from evaporative drying and overpressure-initiated levitation, all induced by depressurization and vaporization. Our findings illuminate the role of supercooling and low-pressure mediated phase change in shaping fluid transport dynamics, with implications for passive anti-icing, advanced cooling, and climate physics.
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Affiliation(s)
- Xiao Yan
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China.
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400030, China.
- Institute of Engineering Thermophysics, Chongqing University, Chongqing, 400030, China.
| | - Samuel C Y Au
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Sui Cheong Chan
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Ying Lung Chan
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Ngai Chun Leung
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Wa Yat Wu
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Dixon T Sin
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Guanlei Zhao
- State Key Laboratory of Automotive Safety and Energy, School of Vehicle and Mobility, Tsinghua University, Beijing, 100084, China
| | - Casper H Y Chung
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Mei Mei
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Yinchuang Yang
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Huihe Qiu
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Shuhuai Yao
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China.
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen, China.
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10
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Gresham IJ, Lilley SG, Nelson ARJ, Koynov K, Neto C. Nanostructure Explains the Behavior of Slippery Covalently Attached Liquid Surfaces. Angew Chem Int Ed Engl 2023; 62:e202308008. [PMID: 37550243 DOI: 10.1002/anie.202308008] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 08/05/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
Slippery covalently-attached liquid surfaces (SCALS) with low contact angle hysteresis (CAH, <5°) and nanoscale thickness display impressive anti-adhesive properties, similar to lubricant-infused surfaces. Their efficacy is generally attributed to the liquid-like mobility of the constituent tethered chains. However, the precise physico-chemical properties that facilitate this mobility are unknown, hindering rational design. This work quantifies the chain length, grafting density, and microviscosity of a range of polydimethylsiloxane (PDMS) SCALS, elucidating the nanostructure responsible for their properties. Three prominent methods are used to produce SCALS, with characterization carried out via single-molecule force measurements, neutron reflectometry, and fluorescence correlation spectroscopy. CO2 snow-jet cleaning was also shown to reduce the CAH of SCALS via a modification of their grafting density. SCALS behavior can be predicted by reduced grafting density, Σ, with the lowest water CAH achieved at Σ≈2. This study provides the first direct examination of SCALS grafting density, chain length, and microviscosity and supports the hypothesis that SCALS properties stem from a balance of layer uniformity and mobility.
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Affiliation(s)
- Isaac J Gresham
- School of Chemistry and the University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, Australia
| | - Seamus G Lilley
- School of Chemistry and the University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, Australia
| | - Andrew R J Nelson
- Australian Center for Neutron Scattering, ANSTO, Sydney, NSW, Australia
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Mainz, Germany
| | - Chiara Neto
- School of Chemistry and the University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, Australia
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11
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Khatir B, Azimi Dijvejin Z, Serles P, Filleter T, Golovin K. Molecularly Capped Omniphobic Polydimethylsiloxane Brushes with Ultra-Fast Contact Line Dynamics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301142. [PMID: 37202658 DOI: 10.1002/smll.202301142] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/18/2023] [Indexed: 05/20/2023]
Abstract
Droplet friction is common and significant in any field where liquids interact with solid surfaces. This study explores the molecular capping of surface-tethered, liquid-like polydimethylsiloxane (PDMS) brushes and its substantial effect on droplet friction and liquid repellency. By exchanging polymer chain terminal silanol groups for methyls using a single-step vapor phase reaction, the contact line relaxation time is decreased by three orders of magnitude-from seconds to milliseconds. This leads to a substantial reduction in the static and kinetic friction of both high- and low-surface tension fluids. Vertical droplet oscillatory imaging confirms the ultra-fast contact line dynamics of capped PDMS brushes, which is corroborated by live contact angle monitoring during fluid flow. This study proposes that truly omniphobic surfaces should not only have very small contact angle hysteresis, but their contact line relaxation time should be significantly shorter than the timescale of their useful application, i.e., a Deborah number less than unity. Capped PDMS brushes that meet these criteria demonstrate complete suppression of the coffee ring effect, excellent anti-fouling behavior, directional droplet transport, increased water harvesting performance, and transparency retention following the evaporation of non-Newtonian fluids.
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Affiliation(s)
- Behrooz Khatir
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Zahra Azimi Dijvejin
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Peter Serles
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Tobin Filleter
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Kevin Golovin
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
- Department of Materials Science & Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
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12
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Sun J, Wang K, Hao R, Zhang Z, Feng Z, Shi Z, Yuan W, Jing Z, Zhang L. Disregarded Free Chains Affect Bacterial Adhesion on Cross-Linked Polydimethylsiloxane Surfaces. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37466242 DOI: 10.1021/acsami.3c05477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
The surface properties exhibited by chemically cross-linked polydimethylsiloxanes (CPDMS) such as morphology, stiffness, and wettability have garnered great interest in the study of bacteria-material interactions. Nevertheless, the hidden factor of uncross-linked free PDMS chains that dissociate in CPDMS has often been overlooked when studying the biofilm formation on these polymeric elastomer surfaces. Here, we undertake a comparative characterization of the effects of free chains in CPDMS on bacterial adhesion to both flat and textured Sharklet CPDMS surfaces. Surprisingly, compared to unextracted surfaces, removing free chains from flat and textured CPDMS through solvent extraction results in a tremendous increase in bacterial colony-forming units for both Gram-negative and Gram-positive bacteria up to 2-3 orders in the initial adhesion stage of 2 h. These findings demonstrate that the solvent extraction of free chains from CPDMS is essential in studying the interactions between bacteria and silicone elastomer materials when focusing on a single variable.
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Affiliation(s)
- Jining Sun
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China
| | - Kunwen Wang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ruonan Hao
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhiyuan Zhang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhongyu Feng
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhenqiang Shi
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenjie Yuan
- School of Bioengineering, Dalian University of Technology, Dalian 116024, China
| | - Zhanyu Jing
- School of Bioengineering, Dalian University of Technology, Dalian 116024, China
| | - Lei Zhang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China
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13
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Gresham IJ, Neto C. Advances and challenges in slippery covalently-attached liquid surfaces. Adv Colloid Interface Sci 2023; 315:102906. [PMID: 37099851 DOI: 10.1016/j.cis.2023.102906] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/13/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023]
Abstract
Over the past decade, a new class of slippery, anti-adhesive surfaces known as slippery covalently-attached liquid surfaces (SCALS) has emerged, characterized by low values of contact angle hysteresis (CAH, less than 5°) with water and most solvents. Despite their nanoscale thickness (1 to 5 nm), SCALS exhibit behavior similar to lubricant-infused surfaces, including high droplet mobility and the ability to prevent icing, scaling, and fouling. To date, SCALS have primarily been obtained using grafted polydimethylsiloxane (PDMS), though there are also examples of polyethylene oxide (PEO), perfluorinated polyether (PFPE), and short-chain alkane SCALS. Importantly, the precise physico-chemical characteristics that enable ultra-low CAH are unknown, making rational design of these systems impossible. In this review, we conduct a quantitative and comparative analysis of reported values of CAH, molecular weight, grafting density, and layer thickness for a range of SCALS. We find that CAH does not scale monotonically with any reported parameter; instead, the CAH minimum is found at intermediate values. For PDMS, optimal behavior is observed at advancing contact angle of 106°, molecular weight between 2 and 10 kg mol-1, and grafting density of around 0.5 nm-2. CAH on SCALS is lowest for layers created from end-grafted chains and increases with the number of binding sites, and can generally be improved by increasing the chemical homogeneity of the surface through the capping of residual silanols. We review the existing literature on SCALS, including both synthetic and functional aspects of current preparative methods. The properties of reported SCALS are quantitatively analyzed, revealing trends in the existing data and highlighting areas for future experimental study.
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Affiliation(s)
- Isaac J Gresham
- School of Chemistry and the University of Sydney Nano Institute, The University of Sydney, NSW Australia, Sydney 2006, NSW, Australia.
| | - Chiara Neto
- School of Chemistry and the University of Sydney Nano Institute, The University of Sydney, NSW Australia, Sydney 2006, NSW, Australia.
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14
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Zhang J, Singh V, Huang W, Mandal P, Tiwari MK. Self-Healing, Robust, Liquid-Repellent Coatings Exploiting the Donor-Acceptor Self-Assembly. ACS APPLIED MATERIALS & INTERFACES 2023; 15:8699-8708. [PMID: 36735767 PMCID: PMC9940105 DOI: 10.1021/acsami.2c20636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Liquid-repellent coatings with rapid self-healing and strong substrate adhesion have tremendous potential for industrial applications, but their formulation is challenging. We exploit synergistic chemistry between donor-acceptor self-assembly units of polyurethane and hydrophobic metal-organic framework (MOF) nanoparticles to overcome this challenge. The nanocomposite features a nanohierarchical morphology with excellent liquid repellence. Using polyurethane as a base polymer, the incorporated donor-acceptor self-assembly enables high strength, excellent self-healing property, and strong adhesion strength on multiple substrates. The interaction mechanism of donor-acceptor self-assembly was revealed via density functional theory and infrared spectroscopy. The superhydrophobicity of polyurethane was achieved by introducing alkyl-functionalized MOF nanoparticles and post-application silanization. The combination of the self-healing polymer and nanohierarchical MOF nanoparticles results in self-cleaning capability, resistance to tape peel and high-speed liquid jet impacts, recoverable liquid repellence over a self-healed notch, and low ice adhesion up to 50 icing/deicing cycles. By exploiting the porosity of MOF nanoparticles in our nanocomposites, fluorine-free, slippery liquid-infused porous surfaces with stable, low ice adhesion strengths were also achieved by infusing silicone oil into the coatings.
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Affiliation(s)
- Jianhui Zhang
- Nanoengineered
Systems Laboratory, UCL Mechanical Engineering, University College London, London WC1E 7JE, U.K.
- Wellcome/EPSRC
Centre for Interventional and Surgical Sciences, University College London, London W1W 7TS, U.K.
| | - Vikramjeet Singh
- Nanoengineered
Systems Laboratory, UCL Mechanical Engineering, University College London, London WC1E 7JE, U.K.
- Wellcome/EPSRC
Centre for Interventional and Surgical Sciences, University College London, London W1W 7TS, U.K.
| | - Wei Huang
- Nanoengineered
Systems Laboratory, UCL Mechanical Engineering, University College London, London WC1E 7JE, U.K.
- Wellcome/EPSRC
Centre for Interventional and Surgical Sciences, University College London, London W1W 7TS, U.K.
| | - Priya Mandal
- Nanoengineered
Systems Laboratory, UCL Mechanical Engineering, University College London, London WC1E 7JE, U.K.
- Wellcome/EPSRC
Centre for Interventional and Surgical Sciences, University College London, London W1W 7TS, U.K.
| | - Manish K. Tiwari
- Nanoengineered
Systems Laboratory, UCL Mechanical Engineering, University College London, London WC1E 7JE, U.K.
- Wellcome/EPSRC
Centre for Interventional and Surgical Sciences, University College London, London W1W 7TS, U.K.
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15
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Abstract
Liquid-repellent surfaces, especially smooth solid surfaces with covalently grafted flexible polymer brushes or alkyl monolayers, are the focus of an expanding research area. Surface-tethered flexible species are highly mobile at room temperature, giving solid surfaces a unique liquid-like quality and unprecedented dynamical repellency towards various liquids regardless of their surface tension. Omniphobic liquid-like surfaces (LLSs) are a promising alternative to air-mediated superhydrophobic or superoleophobic surfaces and lubricant-mediated slippery surfaces, avoiding fabrication complexity and air/lubricant loss issues. More importantly, the liquid-like molecular layer controls many important interface properties, such as slip, friction and adhesion, which may enable novel functions and applications that are inaccessible with conventional solid coatings. In this Review, we introduce LLSs and their inherent dynamic omniphobic mechanisms. Particular emphasis is given to the fundamental principles of surface design and the consequences of the liquid-like nature for task-specific applications. We also provide an overview of the key challenges and opportunities for omniphobic LLSs.
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Affiliation(s)
- Liwei Chen
- School of Materials Science and Engineering, Key Laboratory for Polymer Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou, P. R. China
- State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, P. R. China
| | - Shilin Huang
- School of Materials Science and Engineering, Key Laboratory for Polymer Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou, P. R. China
- State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, P. R. China
| | - Robin H A Ras
- Department of Applied Physics, Aalto University School of Science, Espoo, Finland.
- Center of Excellence in Life-Inspired Hybrid Materials (LIBER), Aalto University, Espoo, Finland.
| | - Xuelin Tian
- School of Materials Science and Engineering, Key Laboratory for Polymer Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou, P. R. China.
- State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, P. R. China.
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16
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Yu B, Sun Z, Liu Y, Wu Y, Zhou F. Photo-Thermal Superhydrophobic Sponge for Highly Efficient Anti-Icing and De-Icing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1686-1693. [PMID: 36642949 DOI: 10.1021/acs.langmuir.2c03384] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Ice accretion always brings much inconvenience in the field of production and life. How to anti-ice or de-ice easily on solid surfaces becomes research focus in the engineering material fields. In this work, a kind of photo-thermal superhydrophobic polyurethane sponge (PSP-SPONGE) was developed by depositing Fe3O4 nanoparticles and polydopamine and simple fluorination treatment to realize anti-icing and de-icing fast under faint sunlight irradiation. Utilizing the thermal insulation of porous PSP-SPONGE, the photo-thermal energy was located at the sunlight irradiation area, which heated PSP-SPONGE surface rapidly under sunlight irradiation in cold surroundings. Water droplets on PSP-SPONGE surface would never freeze under faint 0.3 kW/m2 ("0.3 sun") sunlight illumination in -30 °C damp surroundings, and the ice melts entirely within 18 min under "1 sun" illumination. Furthermore, PSP-SPONGE has excellent self-cleaning and self-healing properties that can cope with the complex and volatile natural environment to guarantee durable anti-icing and de-icing performances. The simulated outdoor snow removal test also proved that snow on PSP-SPONGE surface could melt under "0.5 sun" sunlight illumination in -30 °C damp surroundings. The PSP-SPONGE fabricated with simple preparation and easy access has wide application prospects in anti-icing and de-icing.
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Affiliation(s)
- Bo Yu
- College of Science, Nanjing Forestry University, Nanjing, Jiangsu210037, PR China
| | - Zhengrong Sun
- College of Science, Nanjing Forestry University, Nanjing, Jiangsu210037, PR China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, Gansu730000, PR China
| | - Yubo Liu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, Gansu730000, PR China
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Shandong Laboratory of Advanced Materials and Green Manufacturing, Yantai264006, PR China
| | - Yang Wu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, Gansu730000, PR China
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Shandong Laboratory of Advanced Materials and Green Manufacturing, Yantai264006, PR China
- Qingdao Centre of Resource Chemistry and New Materials, Qingdao, Shandong266100, PR China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, Gansu730000, PR China
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17
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Chu C, Zhao Y, Hao P, Lv C. Wetting state transitions of individual condensed droplets on pillared textured surfaces. SOFT MATTER 2023; 19:670-678. [PMID: 36597934 DOI: 10.1039/d2sm01271e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The ability to realize the self-removal of condensed droplets from a surface is of critical importance for science and applications such as water harvesting and thermal engineering. Despite the enormous interest in micro/nanotextured superhydrophobic materials for high-efficiency condensation, a clear picture of the wetting state transition of condensed droplets is missing, particularly, on a single-droplet level of the order of micrometers. Herein, by varying a substantial parameter space of the contact angle and the geometry of the pillared textures, we have quantified the wetting transition of individual droplets during condensation. We found that a droplet is finally either spontaneously removed from the textures due to a Laplace pressure difference or wets the textures; four different wetting state transition modes have been identified numerically and they are classified in a phase diagram. Simple theories have been constructed to correlate the critical conditions of the wetting state transition to the wettability and geometry of the textures, and they were verified experimentally. We found that the self-removal of condensed droplets benefits from the contact angle and the height of the pillars. These findings not only enhance our fundamental understanding of the wetting state transition of condensed droplets but also allow the rational design of micro/nanotextured water-repellent materials for anti-fogging and anti-wetting.
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Affiliation(s)
- Chenlei Chu
- Department of Engineering Mechanics, AML, Tsinghua University, 100084 Beijing, China.
- Beijing Institute of Spacecraft Environment Engineering, 100094 Beijing, China
| | - Yinggang Zhao
- Department of Engineering Mechanics, AML, Tsinghua University, 100084 Beijing, China.
| | - Pengfei Hao
- Department of Engineering Mechanics, AML, Tsinghua University, 100084 Beijing, China.
- Tsinghua University (School of Materials Science and Engineering)-AVIC Aerodynamics Research Institute Joint Research Center for Advanced Materials and Anti-Icing, Tsinghua University, 100084 Beijing, China
| | - Cunjing Lv
- Department of Engineering Mechanics, AML, Tsinghua University, 100084 Beijing, China.
- Center for Nano and Micro Mechanics, Tsinghua University, 100084 Beijing, China
- State Key Laboratory of Tribology in Advanced Equipment (SKLT), Tsinghua University, 100084 Beijing, China
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18
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Macdonald B, Zhang C, Chen Z, Tuteja A. Polysiloxane-Based Liquid-like Layers for Reducing Polymer and Wax Fouling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:274-284. [PMID: 36583570 DOI: 10.1021/acs.langmuir.2c02489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Surface fouling occurs when undesired matter adheres and accumulates on a surface, resulting in a decrease or loss of functionality. Polymer and wax fouling can cause costly blockages to crude oil pipelines, clog jet fuel injectors, foul chemical reaction vessels, and significantly decrease the efficiency of heat exchangers. Fouling occurs in many forms but can be segmented based on adherent size, modulus, and chemical functionality. Depending on the foulant, surface design strategies can vary greatly. Few strategies exist to prevent the buildup of wax and polymers on surfaces. In this report, we investigate the potential of highly disordered, siloxane liquid-like layers as a strategy for reducing wax and polymer deposition. In our tests, it was found that the liquid-like layers developed here were able to reduce postadsorption roughness for polymer and wax by as much as 35- and 47-fold, respectively, when compared to the control. SFG was utilized to investigate the molecular-level interfacial properties for each of the modified surfaces to help understand the antifouling mechanism. The data showed that the likely higher grafting density and a large degree of random conformational freedom at the liquid-surface interface make the developed siloxane-covered surfaces energetically unfavorable for polymer and wax accretion.
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Affiliation(s)
- Brian Macdonald
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Chengcheng Zhang
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Zhan Chen
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Anish Tuteja
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
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19
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Liu Y, Wu Y, Zhou F. Shear-Stable Polymer Brush Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:37-44. [PMID: 36546609 DOI: 10.1021/acs.langmuir.2c03012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Research on polymer brushes (PBs) has aroused great interest due to their wide range of applications in lubrication, antifogging, antifouling, self-cleaning, antiadhesion, antibacterial effects, and so forth. However, the weak mechanical strength, especially the low bond strength between the PBs and the substrate surface, is a long-standing challenge for its practical applications, which is directly related to the service life of the PB surface. Fortunately, the imperfection of the PB surface was gradually solved by researchers by combining the action of the chemical and physical anchoring strength, and many shear-stable PB surfaces were developed. In this Perspective, we present recent developments in the studies of shear-stable PBs. Conventional strategies that altered the structure of PB chain methods, including increasing grafted density, cross-linking of PBs, cyclic PBs, and so forth, are introduced briefly. The systematic subsurface grafting of the polymer brush (SSPB) strategy was introduced emphatically. The SSPB method grafted PB into the subsurface with considerable depth and gave a robust and reusable PB layer, which provided an approach for tackling the shear-resistance issue. Besides, the robust hydrophobic poly(dimethylsiloxane) (PDMS) brush surface that lubricated itself in air was also introduced. Finally, we provide a synopsis and discuss the outlook of the shear-stable PB surface.
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Affiliation(s)
- Yizhe Liu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Gansu, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yang Wu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Gansu, Lanzhou 730000, China
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Shandong Laboratory of Advanced Materials and Green Manufacturing, Yantai 264006, China
- Qingdao Centre of Resource Chemistry and New Materials, Shandong Qingdao 266100, China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Gansu, Lanzhou 730000, China
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20
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Jiao S, Ma D, Cheng Z, Meng J. Super-Slippery Poly(Dimethylsiloxane) Brush Surfaces: From Fabrication to Practical Application. Chempluschem 2023; 88:e202200379. [PMID: 36650726 DOI: 10.1002/cplu.202200379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/24/2022] [Indexed: 12/29/2022]
Abstract
Superwetting surfaces with special slippery performances have been the focus of practical applications and basic research for decades. Compared to superhydrophobic/superoleophobic and slippery liquid-infused porous surfaces (SLIPS), liquid-like covalently attached poly(dimethylsiloxane) (PDMS) brush surfaces have no trouble in constructing the micro/nanostructure and the loss of infused lubricant, meanwhile, it can also provide lots of new advantages, such as smooth, transparent, pressure- and temperature-resistant, and low contact angle hysteresis (CAH) to diverse liquids. This paper focuses on the relationship between the wetting performance and practical functional application of PDMS brush surfaces. Recent progress of the preparation of PDMS brush surfaces and their super-slippery performances, with a special focus on diverse functional applications were summarized. Finally, perspectives on future research directions are also discussed.
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Affiliation(s)
- Shouzheng Jiao
- State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Deping Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Zhongjun Cheng
- State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Junhui Meng
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
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21
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Abstract
Water harvesting from air has the potential to alleviate water scarcity in arid regions around the globe. To achieve efficient water harvesting, we prefer rapid vapor condensation and droplet collection simultaneously. Prior techniques are not able to separate the vapor and liquid flow, so the condensed droplets always hinder the vapor condensation. In this work, we report a flow-separation condensation mode on a hydrophilic reentrant slippery liquid-infused porous surface. The slippery reentrant channels absorb the condensed droplets, lock the liquid columns inside, and transport them to the end of each channel. As a result, the sustainable flow separation significantly increases the water harvesting rate. Water harvesting from air is desired for decentralized water supply wherever water is needed. When water vapor is condensed as droplets on a surface the unremoved droplets act as thermal barriers. A surface that can provide continual droplet-free areas for nucleation is favorable for condensation water harvesting. Here, we report a flow-separation condensation mode on a hydrophilic reentrant slippery liquid-infused porous surface (SLIPS) that rapidly removes droplets with diameters above 50 μm. The slippery reentrant channels lock the liquid columns inside and transport them to the end of each channel. We demonstrate that the liquid columns can harvest the droplets on top of the hydrophilic reentrant SLIPS at a high droplet removal frequency of 130 Hz/mm2. The sustainable flow separation without flooding increases the water harvesting rate by 110% compared to the state-of-the-art hydrophilic flat SLIPS. Such a flow-separation condensation approach paves a way for water harvesting.
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22
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Yan X, Chen F, Zhao C, Wang X, Li L, Khodakarami S, Fazle Rabbi K, Li J, Hoque MJ, Chen F, Feng J, Miljkovic N. Microscale Confinement and Wetting Contrast Enable Enhanced and Tunable Condensation. ACS NANO 2022; 16:9510-9522. [PMID: 35696260 DOI: 10.1021/acsnano.2c02669] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Dropwise condensation represents the upper limit of thermal transport efficiency for liquid-to-vapor phase transition. A century of research has focused on promoting dropwise condensation by attempting to overcome limitations associated with thermal resistance and poor surface-modifier durability. Here, we show that condensation in a microscale gap formed by surfaces having a wetting contrast can overcome these limitations. Spontaneous out-of-plane condensate transfer between the contrasting parallel surfaces decouples the nanoscale nucleation behavior, droplet growth dynamics, and shedding processes to enable minimization of thermal resistance and elimination of surface modification. Experiments on pure steam combined with theoretical analysis and numerical simulation confirm the breaking of intrinsic limits to classical condensation and demonstrate a gap-dependent heat-transfer coefficient with up to 240% enhancement compared to dropwise condensation. Our study presents a promising mechanism and technology for compact energy and water applications where high, tunable, gravity-independent, and durable phase-change heat transfer is required.
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Affiliation(s)
- Xiao Yan
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Feipeng Chen
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Chongyan Zhao
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Xiong Wang
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Longnan Li
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Siavash Khodakarami
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Kazi Fazle Rabbi
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Jiaqi Li
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Muhammad Jahidul Hoque
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Feng Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jie Feng
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Nenad Miljkovic
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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23
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Monga D, Guo Z, Shan L, Taba SA, Sarma J, Dai X. Quasi-Liquid Surfaces for Sustainable High-Performance Steam Condensation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:13932-13941. [PMID: 35287435 DOI: 10.1021/acsami.2c00401] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Sustainable high-performance steam condensation is critical to reducing the size, weight, and cost of water and energy systems. It is well-known that dropwise condensation can provide a significantly higher heat-transfer coefficient than filmwise condensation. Tremendous efforts have been spent to promote dropwise condensation by achieving a nonwetting state on superhydrophobic surfaces and a slippery state on liquid-infused surfaces, but these surfaces suffer from severe durability challenges. Here, we report sustainable high-performance dropwise condensation of steam on newly developed durable quasi-liquid surfaces, which are easily made by chemically bonding quasi-liquid polymer molecules on solid substrates. As a result, the solid/water interface is changed to a quasi-liquid/water interface with minimal adhesion and extraordinary durability. The quasi-liquid surface with ultralow contact angle hysteresis down to 1° showed a heat-transfer coefficient up to 70 and 380% higher than those on conventional hydrophobic and hydrophilic surfaces, respectively. Furthermore, we demonstrated that the quasi-liquid coating exhibited a sustainable heat-transfer coefficient of 71 kW/(m2 K) at a heat flux of 420 kW/m2 under a prolonged period of 39 h in continuous steam condensation. Such a quasi-liquid surface has the potential to sustain high-performance dropwise condensation of steam and address the long-standing durability challenge in the field.
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Affiliation(s)
- Deepak Monga
- Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Zongqi Guo
- Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Li Shan
- Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Seyed Adib Taba
- Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Jyotirmoy Sarma
- Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Xianming Dai
- Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
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24
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Halvey AK, Macdonald B, Golovin K, Boban M, Dhyani A, Lee DH, Gose JW, Ceccio SL, Tuteja A. Rapid and Robust Surface Treatment for Simultaneous Solid and Liquid Repellency. ACS APPLIED MATERIALS & INTERFACES 2021; 13:53171-53180. [PMID: 34709778 DOI: 10.1021/acsami.1c14174] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A wide range of liquid and solid contaminants can adhere to everyday functional surfaces and dramatically alter their performance. Numerous surface modification strategies have been developed that can reduce the fouling of some solids or repel certain liquids but are generally limited to specific contaminants or class of foulants. This is due to the typically distinct mechanisms that are employed to repel liquids vs solids. Here, we demonstrate a rapid and facile surface modification technique that yields a thin film of linear chain siloxane molecules covalently tethered to a surface. We investigate and characterize the liquid-like morphology of these surfaces in detail as the key contributing factor to their anti-fouling performance. This surface treatment is extremely durable and readily repels a broad range of liquids with varying surface tensions and polarities, including water, oils, organic solvents, and even fluorinated solvents. Additionally, the flexible, liquid-like nature of these surfaces enables interfacial slippage, which dramatically reduces adhesion to various types of solids, including ice, wax, calcined gypsum, and cyanoacrylate adhesives, and also minimizes the nucleation of inorganic scale. The developed surfaces are durable and simple to fabricate, and they minimize fouling by both liquids and solids simultaneously.
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Affiliation(s)
- Alex Kate Halvey
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Brian Macdonald
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kevin Golovin
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mathew Boban
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Abhishek Dhyani
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Duck Hyun Lee
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - James W Gose
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor 48109, Michigan, United States
| | - Steven L Ceccio
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor 48109, Michigan, United States
| | - Anish Tuteja
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Chemical Engineering, University of Michigan, Ann Arbor 48109, Michigan, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
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25
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Abstract
Ice accretion can lead to severe consequences in daily life and sometimes catastrophic events. To mitigate the hazard of icing, passive icephobic surfaces have drawn widespread attentions because of their abilities in repelling incoming water droplets, suppressing ice nucleation and/or lowering ice adhesion strength. As time elapses and temperature lowers sufficiently, ice accretion becomes inevitable, and a realistic roadmap to surface icephobicity for various outdoor anti-icing applications is to live with ice but with the lowest ice adhesion strength. In this review, surfaces with icephobicity are critically categorized into smooth surfaces, textured surfaces, slippery surfaces and sub-surface textured surfaces, and discussed in terms of theoretical limit, current status and perspectives. Particular attention is paid to multiple passive anti-icing strategies combined approaches as proposed on the basis of icephobic surfaces. Correlating the current strategies with one another will promote understanding of the key parameters in lowering ice adhesion strength. Finally, we provide remarks on the rational design of state-of-the-art icephobic surfaces with low ice adhesion strength.
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26
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Wang F, Zhuo Y, He Z, Xiao S, He J, Zhang Z. Dynamic Anti-Icing Surfaces (DAIS). ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2101163. [PMID: 34499428 PMCID: PMC8564445 DOI: 10.1002/advs.202101163] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 07/24/2021] [Indexed: 05/03/2023]
Abstract
Remarkable progress has been made in surface icephobicity in the recent years. The mainstream standpoint of the reported antiicing surfaces yet only considers the ice-substrate interface and its adjacent regions being of static nature. In reality, the local structures and the overall properties of ice-substrate interfaces evolve with time, temperature and various external stimuli. Understanding the dynamic properties of the icing interface is crucial for shedding new light on the design of new anti-icing surfaces to meet challenges of harsh conditions including extremely low temperature and/or long working time. This article surveys the state-of-the-art anti-icing surfaces and dissects their dynamic changes of the chemical/physical states at icing interface. According to the focused critical ice-substrate contacting locations, namely the most important ice-substrate interface and the adjacent regions in the substrate and in the ice, the available anti-icing surfaces are for the first time re-assessed by taking the dynamic evolution into account. Subsequently, the recent works in the preparation of dynamic anti-icing surfaces (DAIS) that consider time-evolving properties, with their potentials in practical applications, and the challenges confronted are summarized and discussed, aiming for providing a thorough review of the promising concept of DAIS for guiding the future icephobic materials designs.
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Affiliation(s)
- Feng Wang
- NTNU Nanomechanical LabDepartment of Structural EngineeringNorwegian University of Science and Technology (NTNU)Trondheim7491Norway
| | - Yizhi Zhuo
- NTNU Nanomechanical LabDepartment of Structural EngineeringNorwegian University of Science and Technology (NTNU)Trondheim7491Norway
| | - Zhiwei He
- College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhou310018China
| | - Senbo Xiao
- NTNU Nanomechanical LabDepartment of Structural EngineeringNorwegian University of Science and Technology (NTNU)Trondheim7491Norway
| | - Jianying He
- NTNU Nanomechanical LabDepartment of Structural EngineeringNorwegian University of Science and Technology (NTNU)Trondheim7491Norway
| | - Zhiliang Zhang
- NTNU Nanomechanical LabDepartment of Structural EngineeringNorwegian University of Science and Technology (NTNU)Trondheim7491Norway
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27
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Nakamura S, Luna JA, Kakiuchida H, Hozumi A. Effective Approach to Render Stable Dynamic Omniphobicity and Icephobicity to Ultrasmooth Metal Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11771-11780. [PMID: 34477391 DOI: 10.1021/acs.langmuir.1c01720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surface modifications for easy removal of liquids and solids from various metal surfaces are much less established than for silicon (Si) or glass substrates. Trimethylsiloxy-terminated polymethylhydrosiloxane (PMHS) is very promising because it can be directly immobilized covalently to a wide variety of metal surfaces by simply heating neat PMHS liquid, resulting in a film showing excellent dynamic omniphobicity. However, such PMHS films are easily degraded by hydrolytic attack in an aqueous environment. In this study, we have successfully improved the hydrolytic stability of the PMHS-covered ultrasmooth metal (Ti, Al, Cr, Ni, and Cu) surfaces by end-capping of the residual Si-H groups of the PMHS films with vinyl-terminated organosilanes, for example, trimethylvinylsilane (TMVS), through a platinum-catalyzed hydrosilylation reaction. The resulting TMVS-capped PMHS film surfaces showed significantly greater stability even after submersion in water for 6 days, with their excellent dynamic dewetting behavior toward water, toluene, n-hexadecane, and ethanol changing little. In addition, they also showed reasonable anti-icing (icephobic) properties with low ice-adhesion strength of less than 50 kPa even after 20 cycles of testing at -15 °C.
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Affiliation(s)
- Satoshi Nakamura
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimo-shidami, Moriyama, Nagoya 463-8560, Japan
| | - Javier A Luna
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimo-shidami, Moriyama, Nagoya 463-8560, Japan
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Hiroshi Kakiuchida
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimo-shidami, Moriyama, Nagoya 463-8560, Japan
| | - Atsushi Hozumi
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimo-shidami, Moriyama, Nagoya 463-8560, Japan
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28
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Zhao X, Khatir B, Mirshahidi K, Yu K, Kizhakkedathu JN, Golovin K. Macroscopic Evidence of the Liquidlike Nature of Nanoscale Polydimethylsiloxane Brushes. ACS NANO 2021; 15:13559-13567. [PMID: 34339162 DOI: 10.1021/acsnano.1c04386] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report macroscopic evidence of the liquidlike nature of surface-tethered poly(dimethylsiloxane) (PDMS) brushes by studying their adhesion to ice. Whereas ice permanently detaches from solid surfaces when subjected to sufficient shear, commonly referred to as the material's ice adhesion strength, adhered ice instead slides over PDMS brushes indefinitely. When additionally methylated, we observe Couette-like flow of the PDMS brushes between the ice and silicon surface. PDMS brush ice adhesion displays a shear-rate-dependent shear stress, rheological behavior reminiscent of liquids, and is affected by ice velocity, temperature, and brush thickness, following scaling laws akin to liquid PDMS films. This liquidlike nature allows ice to detach solely by self-weight, yielding an ice adhesion strength of 0.3 kPa, 1000 times less than a low surface energy, perfluorinated monolayer. The methylated PDMS brushes also display omniphobicity, repelling essentially all liquids with vanishingly small contact angle hysteresis. Methylation results in significantly higher contact angles than previously reported, nonmethylated brushes, especially for polar liquids of both high and low surface tension.
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Affiliation(s)
- Xiaoxiao Zhao
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1 V7, Canada
| | - Behrooz Khatir
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1 V7, Canada
| | - Kiana Mirshahidi
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1 V7, Canada
| | - Kai Yu
- Centre for Blood Research, Life Science Institute and Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Jayachandran N Kizhakkedathu
- Centre for Blood Research, Life Science Institute and Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
- The School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Kevin Golovin
- Okanagan Polymer Engineering Research & Applications Laboratory, School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1 V7, Canada
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29
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Dhyani A, Wang J, Halvey AK, Macdonald B, Mehta G, Tuteja A. Design and applications of surfaces that control the accretion of matter. Science 2021; 373:373/6552/eaba5010. [PMID: 34437123 DOI: 10.1126/science.aba5010] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Surfaces that provide control over liquid, solid, or vapor accretion provide an evolutionary advantage to numerous plants, insects, and animals. Synthetic surfaces inspired by these natural surfaces can have a substantial impact on diverse commercial applications. Engineered liquid and solid repellent surfaces are often designed to impart control over a single state of matter, phase, or fouling length scale. However, surfaces used in diverse real-world applications need to effectively control the accrual of matter across multiple phases and fouling length scales. We discuss the surface design strategies aimed at controlling the accretion of different states of matter, particularly those that work across multiple length scales and different foulants. We also highlight notable applications, as well as challenges associated with these designer surfaces' scale-up and commercialization.
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Affiliation(s)
- Abhishek Dhyani
- Macromolecular Science and Engineering, University of Michigan-Ann Arbor, MI, USA.,Biointerfaces Institute, University of Michigan-Ann Arbor, MI, USA
| | - Jing Wang
- Department of Mechanical Engineering, University of Michigan-Ann Arbor, MI, USA
| | - Alex Kate Halvey
- Biointerfaces Institute, University of Michigan-Ann Arbor, MI, USA.,Department of Materials Science and Engineering, University of Michigan-Ann Arbor, MI, USA
| | - Brian Macdonald
- Biointerfaces Institute, University of Michigan-Ann Arbor, MI, USA.,Department of Materials Science and Engineering, University of Michigan-Ann Arbor, MI, USA
| | - Geeta Mehta
- Macromolecular Science and Engineering, University of Michigan-Ann Arbor, MI, USA.,Department of Materials Science and Engineering, University of Michigan-Ann Arbor, MI, USA.,Department of Biomedical Engineering, University of Michigan-Ann Arbor, MI, USA
| | - Anish Tuteja
- Macromolecular Science and Engineering, University of Michigan-Ann Arbor, MI, USA. .,Biointerfaces Institute, University of Michigan-Ann Arbor, MI, USA.,Department of Materials Science and Engineering, University of Michigan-Ann Arbor, MI, USA.,Department of Chemical Engineering, University of Michigan-Ann Arbor, MI, USA
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30
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Yu M, Liu M, Fu S. Slippery Antifouling Polysiloxane-Polyurea Surfaces with Matrix Self-Healing and Lubricant Self-Replenishing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:32149-32160. [PMID: 34212721 DOI: 10.1021/acsami.1c07132] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The inferior mechanical properties and the difficulty in repairing damaged substrates and lubricant films of slippery liquid-infused porous surfaces significantly hampered their practical applications. To solve this problem, we fabricated a polysiloxane-polyurea slippery elastomer with lubricant self-replenishing and matrix self-healing properties by encapsulating silicone oil into the thermoplastic elastomers. By optimizing the chemical compositions and molecular interactions, the obtained slippery elastomer exhibits unique mechanical properties with a maximum breaking strength of 0.12 MPa, elongation of 1600%, and self-healing efficiency of 98%. Moreover, the lubricant stored in the capsule of the slippery elastomer can be controlled released under mechanical stimulation, further realizing surfaces' self-lubricating and liquid manipulation switching between slippery and pinning states. Furthermore, the textile-reinforced slippery elastomer with superior mechanical strength also exhibited liquid repellency, anti-biofouling, and drag reduction properties. Therefore, this textile-reinforced omniphobic surface with high mechanical property, matrix self-healing, and lubricant self-replenishing property shows a broad application prospect in surface protection, underwater antifouling, and drag reduction.
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Affiliation(s)
- Mengnan Yu
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China
| | - Mingming Liu
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China
| | - Shaohai Fu
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China
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31
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Chen Y, Yu X, Chen L, Liu S, Xu X, Zhao S, Huang S, Tian X. Dynamic Poly(dimethylsiloxane) Brush Coating Shows Even Better Antiscaling Capability than the Low-Surface-Energy Fluorocarbon Counterpart. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:8839-8847. [PMID: 34138548 DOI: 10.1021/acs.est.1c01850] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Scale formation is a significant problem in a wide range of industries, including water treatment, food processing, power plants, and oilfield production. While surface modification provides a promising methodology to address this challenge, it has generally been believed that surface coatings with the lowest surface energy, such as fluorocarbon coatings, are most suitable for antiscaling applications. In contrast to this general knowledge, here we show that a liquid-like coating featuring highly mobile linear poly(dimethylsiloxane) (LPDMS) brush chains can bring an even better antiscaling performance than conventional perfluoroalkylsilane coatings, despite the fact that the former has much higher surface energy than the latter. We demonstrate that the LPDMS brush coating can more effectively inhibit heterogeneous nucleation of scale on a substrate compared with common perfluoroalkylsilane or alkylsilane coatings, and the dynamic liquid-like characteristic of the LPDMS brush coating is speculated to be responsible for its excellent nucleation inhibiting ability by reducing the affinity and effective interface interaction between the substrate and the scale nucleus. Our findings reveal the great prospect of using liquid-like coating to replace environmentally hazardous fluorine-containing organic ones as a green and cost-effective solution to address the scale problem with enhanced antiscaling performance.
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Affiliation(s)
- Yuxin Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiaodong Yu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Liwei Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Shilin Liu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiaofei Xu
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shuangliang Zhao
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology and School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Shilin Huang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
| | - Xuelin Tian
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
- Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510006, China
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32
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Nakamura S, Luna JA, Hozumi A. Recent Progress in Research on “Liquid-Like” Surfaces Showing Low Contact Angle Hysteresis and Excellent Liquid Sliding Behavior. J PHOTOPOLYM SCI TEC 2021. [DOI: 10.2494/photopolymer.34.639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Satoshi Nakamura
- National Institute of Advanced Industrial Science and Technology (AIST)
| | | | - Atsushi Hozumi
- National Institute of Advanced Industrial Science and Technology (AIST)
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33
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Lu J, Gao Z, Xu T, Zhu X, Miao X, Song Y, Ren G, Li X. Robust Hydrogel Coating with Oil-Repellent Property in Air, Water, and Oil Surroundings. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49138-49145. [PMID: 33064446 DOI: 10.1021/acsami.0c16410] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Development of a robust self-cleaning oil-repellent surface in a cost-efficient and green manner is highly desirable, yet still difficult to realize. Herein, we develop a poly(vinyl alcohol) (denoted as PVA) composite hydrogel on which the oily contaminations can be removed efficiently by water merely. Owing to its high affinity to water and resistance to oils, the water-wetted hydrogel establishes a slippery oil-repellent state in air, displays underwater superoleophobicity with ultralow adhesion to all probe oils, and blocks oil from permeating when immersed into an oil surrounding. Oily contaminations on the PVA hydrogel surface are removed just by titling or water immersion, with no oil residue left behind. This enhanced oil repellency was retained after hand-bending, water-jetting, and even 1000 cycles of sand abrasion, demonstrating mechanical robustness. Application of the PVA hydrogel-coated copper mesh is demonstrated to separate oil/water and oil/oil mixtures, with separation efficiency being greater than 98%.
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Affiliation(s)
- Jingwei Lu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Zhongshuai Gao
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Ting Xu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Xiaotao Zhu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Xiao Miao
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, China
| | - Yuanming Song
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Guina Ren
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Xiangming Li
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
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