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Lin J, Niu L, Jiang Y, Wang Y, Chu Z, Yang Z, Xie Z, Yang Y. Magnetic Hyperporous Elastic Material with Excellent Fatigue Resistance and Oil Retention for Oil-Water Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12078-12088. [PMID: 38805683 DOI: 10.1021/acs.langmuir.4c00871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Oily wastewater has caused serious threats to the environment; thus, high-performance absorbing materials for effective oil-water separation technology have attracted increasing attention. Herein, we develop a magnetic, hydrophobic, and lipophilic hyperporous elastic material (HEM) templated by high internal phase emulsions (HIPE), in which free-radical polymerization of butyl acrylate (BA) and divinylbenzene (DVB) is employed in the presence of poly(dimethylsiloxane) (PDMS), lecithin surfactant, and modified Fe3O4 nanoparticles. The adoption of the emulsion template with nanoparticles as both stabilizers and cross-linkers endows the HEM with biomimetic hierarchical open-cell micropores and elastic cross-linked networks, generating an oil absorbent with outstanding mechanical stability. Compressive fatigue resistance of the HEM is demonstrated to endure 2000 mechanical cycles without plastic deformation or strength degradation. By exploiting the synergistic effect of hierarchical structures and low-surface-energy components, the resulting HEM also possesses excellent and robust hydrophobicity (water contact angle of 164°) and good oil absorption capacity, in which Fe3O4 nanoparticles lead to convenient magnetically controlled oil recyclability as well. Notably, the unique biomimetic microporous structure demonstrates superior oil retention capacity (>95% at 1000 rpm and >60% at 10,000 rpm) over the state-of-the-art porous materials for a diverse variety of oils to reduce the risk of secondary oil leakage, along with good recoverability by squeezing owing to the excellent compression resilience. These excellent performances of our HEM provide broad prospects for practical applications in oil-water separation, energy conversion, and smart soft robotics.
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Affiliation(s)
- Jiamian Lin
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Liyong Niu
- Institute of Nanoscience and Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Yuanyuan Jiang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Yuting Wang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Zhuangzhuang Chu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Zhuohong Yang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Zhuang Xie
- School of Materials Science and Engineering and Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Yu Yang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P. R. China
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2
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Wu Z, He J, Zhao G, Tang X, Li J, Chen W, Li R. Superhydrophilic PANI/Ag/TA@PVDF Composite Membrane with Antifouling Property for Oil-Water Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:11329-11339. [PMID: 38748512 DOI: 10.1021/acs.langmuir.4c01229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The current membrane materials used for oil-water separation suffer from low separation efficiency and poor durability, and membrane contamination is also a key issue that must be addressed urgently. In this paper, a superhydrophilic PANI/Ag/TA@PVDF composite membrane with PANI-Ag NPs heterojunction structure was prepared via chelation and reduction of Ag+ by tannic acid (TA) and in situ growth of hydrochloric acid-doped polyaniline (PANI). TA endows the prepared composite membrane with excellent superhydrophilicity and underwater oleophobicity, remarkable oil-water separation capacity (the separation efficiency of more than 97% for soybean oil), and extraordinary antifouling properties. Notably, the range of photodegradation is expanded from UV to visible light by the construction of a Schottky heterostructure between PANI and Ag NPs, the photocatalytic degradation ability of composite membrane for organic pollutants has been improved obviously, and the degradation efficiency for crystal violet (CV) is 97.9%. Considering these merits, the PANI/Ag/TA@PVDF composite membrane provides an effective strategy to overcome the shortcomings of existing membrane materials, presenting enormous potential in the treatment and purification of oily wastewater.
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Affiliation(s)
- Zhenmin Wu
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
| | - Jie He
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
| | - Guoyu Zhao
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
| | - Xiaoyan Tang
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
| | - Junqing Li
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
| | - Wenhang Chen
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
| | - Ruiqi Li
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
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3
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Li R, Chen W, Li J, Zhang C, Sun Y, Tang X, Liu Y. Synthesis of the Ag 2S/PANI@PES Composite Membrane and Its Antipollution Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5869-5877. [PMID: 38437509 DOI: 10.1021/acs.langmuir.3c03769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
Membrane separation technology offers a sustainable and efficient solution to wastewater management; however, membrane fouling significantly impedes its application. Photocatalytic membranes, integrating photocatalytic and membrane separation technologies, enhance membrane separation efficacy while effectively mitigating organic and biological contaminations. In this work, Ag2S/PANI@PES composite membranes were prepared via a facile in situ polymerization and successive layer adsorption technique. The modified poly(ether sulfone) (PES) membrane demonstrated improved hydrophilicity and separation performance, and its heterostructure between polyaniline (PANI), Ag0, and Ag2S effectively addressed organic fouling issues. Moreover, Ag2S/PANI@PES exhibited outstanding antimicrobial properties, as well as chemical and mechanical stability.
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Affiliation(s)
- Ruiqi Li
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Wenhang Chen
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Junqing Li
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Chunhong Zhang
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
- Yantai Research Institute of Harbin Engineering University, Yantai 26400, PR China
| | - Yueling Sun
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - XiaoYan Tang
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Yuan Liu
- Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
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4
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Chen N, Chen S, Yin H, Zhu B, Liu M, Yang Y, Zhang Z, Wei G. Durable underwater super-oleophobic/super-hydrophilic conductive polymer membrane for oil-water separation. WATER RESEARCH 2023; 243:120333. [PMID: 37454459 DOI: 10.1016/j.watres.2023.120333] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/16/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
Oily sewage has made serious impact on environment and people's life, and its treatment has become a global problem to be urgently solved. Oil-water separation has been considered to be an effective method to treat oily sewage at present. In this work, an underwater super-oleophobic/super-hydrophilic membrane with oil-water separation and self-cleaning properties was fabricated by electrochemical oxidation of sodium lignosulfonate doped polypyrrole. The membrane showed super-hydrophilicity for water-removal in air and super-hydrophilicity for oil-removal underwater in both oxidation and reduction states. The oil-water separation efficiency of the membranes for different organics exceeded 98.44%, no matter in oxidation or reduction state. Moreover, the membrane still exhibited excellent performance in terms of the oil-water separation efficiency and flux after 70 cycles, which were greater than 97.18% and 70.14 L·m-2·h-1, respectively. Simultaneously, through exploration of the mechanism, it was found that the larger anion kept intact in the membrane during the redox process, which made the stability of composition and performance. Thus, the membrane with advantageous properties, including underwater super-oleophobic/super-hydrophilicity, high oil-water separation efficiency, high circulating rate and stability, has significant potential in separation and collection of oily sewage.
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Affiliation(s)
- Na Chen
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China
| | - Sian Chen
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China
| | - Hang Yin
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China; State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, 116023, Liaoning, China
| | - Benfeng Zhu
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China; Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China.
| | - Mengyan Liu
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China
| | - Yumeng Yang
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China
| | - Zhao Zhang
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Guoying Wei
- College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang, 310018, PR China.
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5
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Huang T, Su Z, Hou K, Zeng J, Zhou H, Zhang L, Nunes SP. Advanced stimuli-responsive membranes for smart separation. Chem Soc Rev 2023. [PMID: 37184537 DOI: 10.1039/d2cs00911k] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Membranes have been extensively studied and applied in various fields owing to their high energy efficiency and small environmental impact. Further conferring membranes with stimuli responsiveness can allow them to dynamically tune their pore structure and/or surface properties for efficient separation performance. This review summarizes and discusses important developments and achievements in stimuli-responsive membranes. The most commonly utilized stimuli, including light, pH, temperature, ions, and electric and magnetic fields, are discussed in detail. Special attention is given to stimuli-responsive control of membrane pore structure (pore size and porosity/connectivity) and surface properties (wettability, surface topology, and surface charge), from the perspective of determining the appropriate membrane properties and microstructures. This review also focuses on strategies to prepare stimuli-responsive membranes, including blending, casting, polymerization, self-assembly, and electrospinning. Smart applications for separations are also reviewed as well as a discussion of remaining challenges and future prospects in this exciting field. This review offers critical insights for the membrane and broader materials science communities regarding the on-demand and dynamic control of membrane structures and properties. We hope that this review will inspire the design of novel stimuli-responsive membranes to promote sustainable development and make progress toward commercialization.
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Affiliation(s)
- Tiefan Huang
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Zhixin Su
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Kun Hou
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Jianxian Zeng
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Hu Zhou
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Lin Zhang
- Engineering Research Center of Membrane and Water Treatment of MOE, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
- Academy of Ecological Civilization, Zhejiang University, Hangzhou, 310058, China
| | - Suzana P Nunes
- King Abdullah University of Science and Technology (KAUST), Nanostructured Polymeric Membranes Laboratory, Advanced Membranes and Porous Materials Center, Biological and Environmental Science and Engineering Division (BESE), Thuwal, 23955-6900, Saudi Arabia.
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6
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Yang J, He T, Li X, Wang R, Wang S, Zhao Y, Wang H. Rapid dipping preparation of superhydrophobic TiO2 cotton fabric for multifunctional highly efficient oil-water separation and photocatalytic degradation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Fan S, Li Y, Wang R, Ma W, Shi Y, Fan W, Zhuo K, Xu G. Intelligent Coatings with Controlled Wettability for Oil-Water Separation. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3120. [PMID: 36144908 PMCID: PMC9500904 DOI: 10.3390/nano12183120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
Intelligent surfaces with controlled wettability have caught much attention in industrial oily wastewater treatment. In this study, a hygro-responsive superhydrophilic/underwater superoleophobic coating was fabricated by the liquid-phase deposition of SiO2 grafted with perfluorooctanoic acid. The wettability of the surface could realize the transformation from superhydrophilicity/underwater superoleophobicity (SHI/USOB) to superhydrophobicity/superoleophilicity (SHB/SOI), both of which exhibited excellent separation performance towards different types of oil-water mixtures with the separation efficiency higher than 99%. Furthermore, the long-chain perfluoroakyl substances on the surface could be decomposed by mixing SiO2 with TiO2 nanoparticles under UV irradiation, which could reduce the pollution to human beings and environment. It is anticipated that the prepared coating with controlled wettability could provide a feasible solution for oil-water separation.
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Affiliation(s)
- Shumin Fan
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Yunxiang Li
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Rujun Wang
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Wenwen Ma
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Yipei Shi
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Wenxiu Fan
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Kelei Zhuo
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Guangri Xu
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
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8
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Abu-Thabit NY, Uwaezuoke OJ, Abu Elella MH. Superhydrophobic nanohybrid sponges for separation of oil/ water mixtures. CHEMOSPHERE 2022; 294:133644. [PMID: 35065181 DOI: 10.1016/j.chemosphere.2022.133644] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 01/06/2022] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
The industrial revolution has led to different types of environmental pollution, including frequent leakage of crude oil to marine waters and the contamination of wastewater with immiscible or emulsified oils and organic liquids from various industrial residues. Hence, developing multifunctional materials for oil/water separation is a field of high significance for the remediation of oil-polluted water. Recently, advanced superwetting materials have been employed for oily wastewater treatment. This review summarizes the recent development in fabricating superhydrophobic/superoleophilic nanohybrid polyurethane, melamine, and cellulose sponges for oil/water separation. The use of organic and/or inorganic nanohybrid materials opens the horizon for designing a diverse and wide range of superhydrophobic sponges due to the synergistic effect between the surface roughness and chemical composition. The discussion is organized based on different classes of low surface energy materials including thermoplastics, thermosets, elastomers, fluorinated polymers, conductive polymers, organosilanes, long alkyl chain compounds, and hydrophobic carbon-based materials. Recent examples for the separation of both immiscible and emulsified oil/water mixtures are presented, with a focus on fabrication strategies, separation efficiency, recyclability, mechanical performance, and durability. Currently, most studies did not focus on the mechanical/chemical stability of the fabricated sponges, and hence, future research directions shall address the fabrication of robust and long-term durable superhydrophobic sponges with proper guidelines. Similarly, more research focus is required to design superhydrophobic sponges for the separation of emulsified oil/water mixtures and heavy crude oil samples. Superhydrophobic sponges can be employed for treatment of oily wastewater, emulsion separation, and cleanup of crude oil spills.
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Affiliation(s)
- Nedal Y Abu-Thabit
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City, 31961, Saudi Arabia.
| | - Onyinye J Uwaezuoke
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Olabisi Onabanjo University, Ago-Iwoye, Ogun State, Nigeria; Wits Advanced Drug Delivery Platform, Department of Pharmacy and Pharmacology, University of Witwatersrand. 7 York Road, Johannesburg, South Africa
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9
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Liu Q, Yan J, Zhang T, Hu J, Bao Y, Wu L, Yu D, Li J. Multiphase media superwettability regulated by coexisting prewetting phase. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Song Z, Lin ES, Uddin MH, Abid HA, Ong JW, Liew OW, Ng TW. Fog Harvesting with Highly Wetting and Nonwetting Vertical Strips. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1845-1852. [PMID: 35080398 DOI: 10.1021/acs.langmuir.1c02965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Highly wetting and nonwetting substrates have been widely used in fogwater collection systems for enhanced water harvesting. In this work, fog harvesting substrates comprising PVC strips of different wetting properties and widths ranging from 1-5 mm were vertically aligned and spaced apart at regular intervals to give the same solid area fraction of 0.8. Evaluation of the water collection efficiencies of the tested configurations revealed that 1 mm wide superhydrophilic strips was the most efficient, achieving double the amount of water harvested compared with 2.8 mm wide strips. This finding was attributed to the low Stokes numbers of the aerosol particle distribution of the fog which tended to result in them being brought by the flow streamlines toward the air gaps between the strips. Stagnant flow regions at the edges of each strip, revealed through potential flow calculations, then caused higher liquid imbibition and impaction there for water harvesting. It was also found that the Cassie nonwetting substrates that originally exhibited contact angles of 161° transformed to Wenzel wetting with zero contact angle within 60 min of fog interception. Optical profilometry revealed no obvious difference in surface roughness between the central region and edges of the strips, indicating that surface morphology was unlikely to be a contributing factor for enhanced water collection at the edges. The findings here indicated that highly wetting vertical strip architectures with narrow widths (1 mm) were favorable over wider strips for water harvesting provided that clogging and re-entrainment were not significant factors.
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Affiliation(s)
- Zhixiong Song
- Laboratory for Optics and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Monash University, Clayton, Victoria 3800 Australia
| | - Eric Shen Lin
- Laboratory for Optics and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Monash University, Clayton, Victoria 3800 Australia
| | - Md Hemayet Uddin
- Melbourne Centre for Nanofabrication, 151 Wellington Rd, Clayton VIC 3168 Australia
| | - Hassan Ali Abid
- Laboratory for Optics and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Monash University, Clayton, Victoria 3800 Australia
| | - Jian Wern Ong
- Laboratory for Optics and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Monash University, Clayton, Victoria 3800 Australia
| | - Oi Wah Liew
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, National University Health System, Centre for Translational Medicine, 14 Medical Drive 117599, Singapore
| | - Tuck Wah Ng
- Laboratory for Optics and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Monash University, Clayton, Victoria 3800 Australia
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Chi H, Xu Z, Zhang T, Li X, Wu Z, Zhao Y. Randomly heterogeneous oleophobic/pH-responsive polymer coatings with reversible wettability transition for multifunctional fabrics and controllable oil-water separation. J Colloid Interface Sci 2021; 594:122-130. [PMID: 33756360 DOI: 10.1016/j.jcis.2021.02.097] [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: 12/25/2020] [Revised: 02/21/2021] [Accepted: 02/23/2021] [Indexed: 11/16/2022]
Abstract
Stimuli-responsive surfaces with wettability change between superhydrophilic and superhydrophobic are susceptible to oil contamination which often ruins the surface. Herein, a coating with pH-switchable wettability transition between superamphiphobic and superhydrophilic-superoleophobic is achieved by rationally designing oleophobic/pH-responsive polymer heterogeneous chemistry. Fabrics modified with this coating show repellency to both water and oils, while upon exposure to acidic water (pH = 1) the fabrics change to be superhydrophilic-superoleophobic within a short response time of <5 s. More importantly, the superamphiphobicity of the fabric can be restored under mild alkaline condition (pH = 10), and the transition is reversible for many cycles. The effective in situ or ex situ wettability change under acidic/alkaline water treatment makes the coated fabric capable of separating oil-water mixture or even some mixtures of immiscible organic solvents. In addition, the coated fabric is also demonstrated to be promising as a new class of functional fabrics that provide protection against water and many oils in one condition, and can change to be hygroscopic, anti-static, oil-repellent and anti-oil-fouling in the other condition for improved wear comfort and self-cleaning.
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Affiliation(s)
- Huanjie Chi
- College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Zhiguang Xu
- China-Australia Institute for Advanced Materials and Manufacturing, Jiaxing University, Jiaxing 314001, China.
| | - Tao Zhang
- College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Xiaomin Li
- College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Zhu Wu
- College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Yan Zhao
- College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China.
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12
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Schoeller J, Itel F, Wuertz-Kozak K, Fortunato G, Rossi RM. pH-Responsive Electrospun Nanofibers and Their Applications. POLYM REV 2021. [DOI: 10.1080/15583724.2021.1939372] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jean Schoeller
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, St.Gallen, Switzerland
- Department of Health Science and Technology, ETH Zürich, Zürich, Switzerland
| | - Fabian Itel
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, St.Gallen, Switzerland
| | - Karin Wuertz-Kozak
- Department of Health Science and Technology, ETH Zürich, Zürich, Switzerland
- Department of Biomedical Engineering, Rochester Institute of Technology (RIT), Rochester, New York, USA
| | - Giuseppino Fortunato
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, St.Gallen, Switzerland
| | - René M. Rossi
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, St.Gallen, Switzerland
- Department of Health Science and Technology, ETH Zürich, Zürich, Switzerland
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13
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pH-Sensitive Membranes with Smart Cleaning Capability for Efficient Emulsion Separation and Pollutant Removal. MEMBRANES 2021; 11:membranes11030193. [PMID: 33799551 PMCID: PMC8000939 DOI: 10.3390/membranes11030193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 02/28/2021] [Accepted: 03/01/2021] [Indexed: 11/17/2022]
Abstract
Since anionic dyes and surfactants abundantly exist in oily wastewater, both the separation of oil/water mixture and removal of low-molecular-weight pollutants are important to realize the advanced purification of water. By grafting poly(2-dimethylaminoethyl methacrylate) (pDMAEMA) onto polyethylene (PP) membrane via ultraviolet (UV)-initiated polymerization, the obtained PP-g-pDMAEMA membrane presented positively in water and negatively in an alkaline buffer (pH 9.0), respectively. Due to the switchable surface charge, the membrane had high emulsion separation efficiency and flux recovery ratio (approximately 100%). Besides, the dye (reactive black 5, RB-5) adsorption capacity reached 140 mg/m2 in water, and approximately 90% RB-5 could be released in pH 9.0. The anionic surfactant (sodium dodecyl benzene sulfonate, SDBS) was also reversely interpreted and released by the membrane via manipulating the ambient pH. The membrane constructed in this study is supposed to realize emulsion separation with smart cleaning capability, as well as the removal of dyes and surfactants, which could be utilized for multifunctional water purification.
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14
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Robust and switchable superwetting sponge-like membrane: Towards on-demand emulsion separation and aqueous pollutant degradation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117469] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Preparation of Fluorine-Free Superhydrophobic Paper with Dual-Response of Temperature and pH. COATINGS 2020. [DOI: 10.3390/coatings10121167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Although various superhydrophobic materials have been manufactured and effectively used for oil–water separation, it is still highly desirable to explore materials which are eco-friendly, low-cost, and multifunctional. In this paper, a stable copolymer solution was prepared from the fluorine-free superhydrophobic copolymer with dual-responsiveness of temperature and pH. The functional superhydrophobic paper was prepared by immersing paper in copolymer solution by the dip-coating method. The surface element and structure analysis of the prepared superhydrophobic paper shows that the dual-responsive copolymer adheres successfully to the surface of the paper without destroying the fiber structure of the paper. At pH ≥ 7 and T > 25 °C, the paper has a good superhydrophobic performance, while under the conditions of pH < 7 and T < 25 °C, the paper comes into a hydrophilic state. Therefore, the dual-responsive superhydrophobic paper is more likely to adapt to the complicated oil-water separation environment than the single-response.
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Three-dimensional adsorbent with pH induced superhydrophobic and superhydrophilic transformation for oil recycle and adsorbent regeneration. J Colloid Interface Sci 2020; 575:231-244. [DOI: 10.1016/j.jcis.2020.04.106] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/14/2020] [Accepted: 04/25/2020] [Indexed: 12/24/2022]
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