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Pham AD, Tao QB, Nam PC. Optimizing the Superhydrophobicity of the Composite PDMS/PUA Film Produced by a R2R System. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Anh-Duc Pham
- Faculty of Mechanical Engineering, The University of Danang─University of Science and Technology, Danang City 550000, Vietnam
| | - Quang Bang Tao
- Faculty of Mechanical Engineering, The University of Danang─University of Science and Technology, Danang City 550000, Vietnam
| | - Pham Cam Nam
- Faculty of Chemical Engineering, The University of Danang─University of Science and Technology, Danang City 550000, Vietnam
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2
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He Y, Wang L, Wu T, Wu Z, Chen Y, Yin K. Facile fabrication of hierarchical textures for substrate-independent and durable superhydrophobic surfaces. NANOSCALE 2022; 14:9392-9400. [PMID: 35730522 DOI: 10.1039/d2nr02157a] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
On account of their wide range of applications in self-cleaning, anti-icing, frost suppression, etc., superhydrophobic surfaces have attracted considerate attention. However, most of the superhydrophobic surfaces can only be prepared on the surfaces of specific materials and are easily damaged in the case of friction. In this work, we propose a facile method to achieve superhydrophobicity on various substrate surfaces. By femtosecond laser direct processing, micron-level grooves and protrusions are constructed on substrates to form a protective layer. Then, the substrates covered by polytetrafluoroethylene (PTFE) were scanned to make the surfaces of the substrates superhydrophobic. Since the PTFE micro-nano-particles are evenly distributed on the grooves and protrusions, the surfaces exhibit robust superhydrophobicity with excellent anti-friction performance that is independent of the substrate properties. This work provides an efficient and environmentally friendly path for achieving robust superhydrophobic surfaces on various substrates.
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Affiliation(s)
- Yuchun He
- Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Lingxiao Wang
- Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Tingni Wu
- Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Zhipeng Wu
- Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Yu Chen
- Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China.
| | - Kai Yin
- Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, China.
- The State Key Laboratory of High Performance and Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
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3
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Tharmavaram M, Pandey G, Bhatt P, Prajapati P, Rawtani D, Sooraj KP, Ranjan M. Chitosan functionalized Halloysite Nanotubes as a receptive surface for laccase and copper to perform degradation of chlorpyrifos in aqueous environment. Int J Biol Macromol 2021; 191:1046-1055. [PMID: 34600951 DOI: 10.1016/j.ijbiomac.2021.09.098] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/27/2021] [Accepted: 09/15/2021] [Indexed: 10/20/2022]
Abstract
Chitosan (CTS) functionalized Halloysite Nanotubes (HNT) have been used as receptive nano-supports for the grafting of copper (Cu) and laccase (Lac) for the degradation of chlorpyrifos. The developed nanocomposite Lac@Cu-CTS-HNT showed 83.4% Lac immobilization which was further characterized by TEM, SEM-EDX, FTIR, XRD, DSC and TGA. The chlorpyrifos degradation studies were performed under constant stirring for 24 h with both free enzyme and Lac@Cu-CTS-HNT and were analysed through HPLC. Percentage degradation of chlorpyrifos with the nanocomposite went as high as 97% for 50 μg/mL chlorpyrifos at neutral pH and room temperature. Variable pesticide and nanocomposite concentration, pH, and temperature studies for pesticide degradation were also performed, followed by reusability studies. The nanocomposite maintained its degradation ability at ~97% even at variable temperature and pH conditions. Reusability study was performed 5 times wherein the degradation percentage remained the same after 5 cycles (~<95%). Degradation kinetics were also performed for the nanocomposite in the presence and absence of the immobilized enzyme. Through this study, it is suggested that Lac@Cu-CTS-HNT can be a potential nano-catalyst for the degradation of chlorpyrifos in aqueous environment.
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Affiliation(s)
- Maithri Tharmavaram
- School of Doctoral Studies & Research, National Forensic Sciences University (Ministry of Home Affairs), sector 9, Gandhinagar 382007, Gujarat, India
| | - Gaurav Pandey
- School of Doctoral Studies & Research, National Forensic Sciences University (Ministry of Home Affairs), sector 9, Gandhinagar 382007, Gujarat, India
| | - Payal Bhatt
- School of Pharmacy, National Forensic Sciences University (Ministry of Home Affairs), sector 9, Gandhinagar 382007, Gujarat, India
| | - Prajesh Prajapati
- School of Pharmacy, National Forensic Sciences University (Ministry of Home Affairs), sector 9, Gandhinagar 382007, Gujarat, India
| | - Deepak Rawtani
- School of Pharmacy, National Forensic Sciences University (Ministry of Home Affairs), sector 9, Gandhinagar 382007, Gujarat, India.
| | - K P Sooraj
- FCIPT, Institute for Plasma Research, Gandhinagar, Gujarat, India
| | - Mukesh Ranjan
- FCIPT, Institute for Plasma Research, Gandhinagar, Gujarat, India
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Hussain MM, Majeed MK, Ma H, Wang Y, Saleem A, Lotfi M. PTFE/EP Reinforced MOF/SiO 2 Composite as a Superior Mechanically Robust Superhydrophobic Agent towards Corrosion Protection, Self-Cleaning and Anti-Icing. Chemistry 2021; 28:e202103220. [PMID: 34750900 DOI: 10.1002/chem.202103220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Indexed: 11/12/2022]
Abstract
Organic resin cross-linking ZIF-67/SiO2 superhydrophobic (SHPB) multilayer coating was successfully fabricated on metal substrate. The perfluoro-octyl-triethoxy silane (POTS) modified ZIF-67 and SiO2 coating was applied on primary coated polytetrafluoroethylene (PTFE) and epoxy resin (EP) via spray coating method. Here, we present that the robust superhydrophobicity can be realized by structuring surfaces at two different length scales, with a nanostructure design to provide water repellence and a microstructure design to provide durability. The as-fabricated multilayer coating displayed superior water-repellence (CA=167.4°), chemical robustness (pH=1-14) and mechanical durability undergoing 120th linear abrasion or 35th rotatory abrasion cycle. By applying different acidic and basic corrosive media and various weathering conditions, it can still maintain superior-hydrophobicity. To get a better insight of interaction between inhibitor molecules and metal surface, density functional theory (DFT) calculations were performed, showing lower energy gap and increased binding energy of ZPS/SiO2 /PTFE/EP (ZPS=ZIF-67+POTS) multilayer coating compared to the ZIF-67/SiO2 /PTFE/EP, thereby supporting the experimental findings. Additionally, such coatings may be useful for applications such as anti-corrosion, self-cleaning, and anti-icing multi-functionalities.
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Affiliation(s)
- Muhammad Muzammal Hussain
- School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Muhammad K Majeed
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Haitao Ma
- School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Yunpeng Wang
- School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Adil Saleem
- College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, Guangdong, P. R. China
| | - Mina Lotfi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
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Guadagno L, Vertuccio L. Resistive Response of Carbon Nanotube-Based Composites Subjected to Water Aging. NANOMATERIALS 2021; 11:nano11092183. [PMID: 34578499 PMCID: PMC8465806 DOI: 10.3390/nano11092183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/18/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022]
Abstract
This work aimed to monitor, through the changes in electrical resistance, the evolution of the mechanical properties due to aging caused by water sorption in carbon nanotube-based epoxy composites. The epoxy/CNT nanocomposites were prepared by dispersing the filler in the precursor through the ultra-sonication process and mixing the hardener by mechanical stirring. After an evaluation of the electrical properties, detected through a two-probe electrical measurement method, of nanocomposites at different percentages by weight of the filler (0.025, 0.05, 0.1, 0.3, 0.5, and 1.0), a concentration (0.1% by weight), close to that of the electrical percolation threshold, was chosen to evaluate the resistive response. This specific concentration was selected in order to obtain maximized values of the variation detected for the changes in the electrical resistance resulting from phenomena of structural relaxations/rearrangements due to water absorption. In particular, the electrical conductivity value switched from 8.2 × 10-14 S/m for the unfilled epoxy resin to 6.3 × 10-2 S/m for carbon nanotube-based epoxy composite at 0.1% by weight of the nanofiller. The water sorption caused a reduction in the mechanical properties (storage modulus and tan δ) due to swelling and plasticization phenomena, which caused the structural reorganization of the conductive interparticle contacts in the matrix with a consequent variation in the electrical resistance of the material. The found 'non-Fickian' water diffusion behavior was very similar to the variation in the electrical resistance with time. This last correlation allows the association of the measurement of the electrical resistance with the quantity of absorbed water and, therefore, with the aging of the material to water absorption, through the sensitivity factor (β). The resistive nature of the composite can be used to monitor the amount of water absorption and the changes in the structure of the material subject to water aging.
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Wang S, Wang Y, Zou Y, Chen G, Ouyang J, Jia D, Zhou Y. Biologically Inspired Scalable-Manufactured Dual-layer Coating with a Hierarchical Micropattern for Highly Efficient Passive Radiative Cooling and Robust Superhydrophobicity. ACS APPLIED MATERIALS & INTERFACES 2021; 13:21888-21897. [PMID: 33909403 DOI: 10.1021/acsami.1c05651] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bioinspired materials for temperature regulation have proven to be promising for passive radiation cooling, and super water repellency is also a main feature of biological evolution. However, the scalable production of artificial passive radiative cooling materials with self-adjusting structures, high-efficiency, strong applicability, and low cost, along with achieving superhydrophobicity simultaneously remains a challenge. Here, a biologically inspired passive radiative cooling dual-layer coating (Bio-PRC) is synthesized by a facile but efficient strategy, after the discovery of long-horned beetles' thermoregulatory behavior with multiscale fluffs, where an adjustable polymer-like layer with a hierarchical micropattern is constructed in various ceramic bottom skeletons, integrating multifunctional components with interlaced "ridge-like" architectures. The Bio-PRC coating reflects above 88% of solar irradiance and demonstrates an infrared emissivity >0.92, which makes the temperature drop by up to 3.6 °C under direct sunlight. Moreover, the hierarchical micro-/nanostructures also endow it with a superhydrophobic surface that has enticing damage resistance, thermal stability, and weatherability. Notably, we demonstrate that the Bio-PRC coatings can be potentially applied in the insulated gate bipolar transistor radiator, for effective temperature conditioning. Meanwhile, the coverage of the dense, super water-repellent top polymer-like layer can prevent the transport of corrosive liquids, ions, and electron transition, illustrating the excellent interdisciplinary applicability of our coatings. This work paves a new way to design next-generation thermal regulation coatings with great potential for applications.
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Affiliation(s)
- Shuqi Wang
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yaming Wang
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yongchun Zou
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Guoliang Chen
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Jiahu Ouyang
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Dechang Jia
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yu Zhou
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
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Zhang W, Wang D, Sun Z, Song J, Deng X. Robust superhydrophobicity: mechanisms and strategies. Chem Soc Rev 2021; 50:4031-4061. [PMID: 33554976 DOI: 10.1039/d0cs00751j] [Citation(s) in RCA: 146] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Superhydrophobic surfaces hold great prospects for extremely diverse applications owing to their water repellence property. The essential feature of superhydrophobicity is micro-/nano-scopic roughness to reserve a large portion of air under a liquid drop. However, the vulnerability of the delicate surface textures significantly impedes the practical applications of superhydrophobic surfaces. Robust superhydrophobicity is a must to meet the rigorous industrial requirements and standards for commercial products. In recent years, major advancements have been made in elucidating the mechanisms of wetting transitions, design strategies and fabrication techniques of superhydrophobicity. This review will first introduce the mechanisms of wetting transitions, including the thermodynamic stability of the Cassie state and its breakdown conditions. Then we highlight the development, current status and future prospects of robust superhydrophobicity, including characterization, design strategies and fabrication techniques. In particular, design strategies, which are classified into passive resistance and active regeneration for the first time, are proposed and discussed extensively.
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Affiliation(s)
- Wenluan Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, China.
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Wang S, Wang Y, Zou Y, Chen G, Ouyang J, Jia D, Zhou Y. Scalable-Manufactured Superhydrophobic Multilayer Nanocomposite Coating with Mechanochemical Robustness and High-Temperature Endurance. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35502-35512. [PMID: 32672926 DOI: 10.1021/acsami.0c10539] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Artificial superhydrophobic coatings with mechanical stability, chemical stability, and strong adhesion have been achieved separately. However, a simultaneous demonstration of these features along with stability to high-temperature exposure is challenging. Herein, inspired by the micro/nanoscale hierarchical superhydrophobic surfaces of solid cactus plants, we propose a novel plasma-enhanced high temperature liquid-phase-assisted oxidation and crosslinking (PHLOC) in-situ co-growth strategy to design superhydrophobic nanocomposite coatings on metals based on organic-inorganic multilayer structures in which PTFE nanoparticles cross-linked to form a compact top layer with hierarchical surface textures on a ceramic skeleton with a papilla array, integrating multiple robust wettability characteristics with mechanochemical strength to isolate the underlying materials from the external environment. Remarkably, the superhydrophobic coating exhibits strong mechanical robustness undergoing the 120th linear abrasion or 40th rotary abrasion cycle and can be applied on large area and arbitrary shapes of metal substrates. Moreover, the samples sustain exposure to highly corrosive media, namely, aqua regia, sodium hydroxide solutions, and simulated seawater solution, to reflect long-term chemical robustness. More importantly, the multilayer coating demonstrates excellent high-temperature endurance, thermal cycling stability of 500 °C, and thermal repairability of superhydrophobicity. With multifaceted robustness and scalability, the superhydrophobic multilayer coating should find potential usage in the field of high-tech equipment with severe alternating or impact loads, high-temperature service, and chemical corrosion.
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Affiliation(s)
- Shuqi Wang
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yaming Wang
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yongchun Zou
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
- Center of Analysis and Measurement, Harbin Institute of Technology, Harbin 150001, China
| | - Guoliang Chen
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Jiahu Ouyang
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Dechang Jia
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
| | - Yu Zhou
- Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080, China
- Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
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