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Synthesis of melamine-formaldehyde microcapsules containing oil-based fragrances via intermediate polyacrylate bridging layers. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2018.10.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Maeda H, Yamagishi R, Ishida EH, Kasuga T. Wettability and dynamics of water droplet on a snail shell. J Colloid Interface Sci 2019; 547:111-116. [PMID: 30947095 DOI: 10.1016/j.jcis.2019.03.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/27/2019] [Accepted: 03/28/2019] [Indexed: 12/25/2022]
Abstract
HYPOTHESIS There are many natural surfaces with special wettabilities. Snail shells have unique rough structures, which indicates a specific wettability. In this study, the surface of a snail shell was simulated using epoxy resins, and water droplet dynamics on original and simulated snail shells were investigated to understand its special wettability. EXPERIMENTS The shell of the Euhadra sandai species of snails was used. The surface structure of the snail shell was simulated using epoxy resins. The surface of this EP resin was treated with UV-O3 for different periods of time. Wettabilities and dynamics of water droplet on the samples were characterized. FINDINGS The surface of the snail shell with a water contact angle of approximately 85° caused the droplet to spread, which is the first report of water droplet dynamics on the shell surface. The behavior of a water droplet on the shell transformed from the Cassie state into the Wenzel state. Changes in the contact angle and diameter of the droplet base on the snail shell were larger than those on the epoxy resins. The surface roughness and chemical heterogeneity of the snail shell led to distortion of the three-phase contact line and enhancement of the spreading of the water droplet.
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Affiliation(s)
- Hirotaka Maeda
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
| | - Ryota Yamagishi
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Emile Hideki Ishida
- Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Toshihiro Kasuga
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Enhanced photocatalytic activity of a novel NiO/Bi2O3/Bi3ClO4 nanocomposite for the degradation of azo dye pollutants under visible light irradiation. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.07.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Annathurai S, Chidambaram S, Baskaran B, Prasanna Venkatesan GKD. Green Synthesis and Electrical Properties of p-CuO/n-ZnO Heterojunction Diodes. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-1026-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Qiao X, Yang C, Zhang Q, Yang S, Chen Y, Zhang D, Yuan X, Wang W, Zhao Y. Preparation of Parabolic Superhydrophobic Material for Oil-Water Separation. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1914. [PMID: 30304798 PMCID: PMC6213289 DOI: 10.3390/ma11101914] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 09/28/2018] [Accepted: 09/29/2018] [Indexed: 12/26/2022]
Abstract
In order to prepare parabolic superhydrophobic materials, copper meshes were used as the substrate and ultrasonic etching and oxidative corrosion were carried out with FeCl₃ solution and H₂O₂ solution, respectively, and then the surface was modified with stearic acid (SA). The topological structure and surface wettability of the prepared mesh were characterized by fluorescence microscope, scanning electron microscopy and contact angle measurement. Finally, the as-prepared copper meshes were applied to oil-water separation. The results showed that the micro-nano-mastoid structure on the surface of the copper mesh was flaky bulges, forming a rough structure similar to a paraboloid. When the oxidative corrosion time of H₂O₂ was 1 min, it is more beneficial to increase the hydrophobicity of the surface of the copper mesh and increase the contact angle of water droplets on the surface of the membrane. Additionally, based on superhydrophobic materials of the parabolic copper mesh, the static contact angles of the water droplets, engine oil and carbon tetrachloride with the surface were approximately 153.6°, 5° and 0.1°, respectively and the sliding angle of the water droplets with the surface were approximately 4.9°. The parabolic membrane was applied to discuss the separation efficiency of different oils with deionized water and the separation efficiency was obtained as benzene > carbon tetrachloride > oil > machine oil. Therefore, based on the research, the parabolic superhydrophobic material has good efficiency of oil-water separation.
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Affiliation(s)
- Xiaoying Qiao
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
- Engineering Research Center of Groundwater and Ecological Environment in Shaanxi Province, Xi'a 710054, China.
| | - Chunyan Yang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
| | - Qian Zhang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
| | - Shengke Yang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
- Engineering Research Center of Groundwater and Ecological Environment in Shaanxi Province, Xi'a 710054, China.
| | - Yangyang Chen
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
| | - Dan Zhang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
| | - Xiaoyu Yuan
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
| | - Wenke Wang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China.
- Engineering Research Center of Groundwater and Ecological Environment in Shaanxi Province, Xi'a 710054, China.
| | - Yaqian Zhao
- Dooge Centre for Water Resource Research, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
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Xu P, Coyle TW, Pershin L, Mostaghimi J. Superhydrophobic ceramic coating: Fabrication by solution precursor plasma spray and investigation of wetting behavior. J Colloid Interface Sci 2018; 523:35-44. [PMID: 29605739 DOI: 10.1016/j.jcis.2018.03.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/02/2018] [Accepted: 03/06/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Pengyun Xu
- Centre for Advanced Coating Technologies, University of Toronto, Toronto, Ontario M5S 3G8, Canada
| | - Thomas W Coyle
- Centre for Advanced Coating Technologies, University of Toronto, Toronto, Ontario M5S 3G8, Canada
| | - Larry Pershin
- Centre for Advanced Coating Technologies, University of Toronto, Toronto, Ontario M5S 3G8, Canada
| | - Javad Mostaghimi
- Centre for Advanced Coating Technologies, University of Toronto, Toronto, Ontario M5S 3G8, Canada.
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Long M, Peng S, Deng W, Miao X, Wen N, Zhou Q, Deng W. Highly efficient separation of surfactant stabilized water-in-oil emulsion based on surface energy gradient and flame retardancy. J Colloid Interface Sci 2018; 520:1-10. [DOI: 10.1016/j.jcis.2018.02.061] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 02/19/2018] [Accepted: 02/19/2018] [Indexed: 11/25/2022]
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Baskoutas S. Special Issue: Zinc Oxide Nanostructures: Synthesis and Characterization. MATERIALS 2018; 11:ma11060873. [PMID: 29882870 PMCID: PMC6025422 DOI: 10.3390/ma11060873] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 05/23/2018] [Accepted: 05/23/2018] [Indexed: 01/13/2023]
Abstract
Zinc oxide (ZnO) is a wide band gap semiconductor with an energy gap of 3.37 eV at room temperature. It has been used considerably for its catalytic, electrical, optoelectronic, and photochemical properties. ZnO nanomaterials, such as quantum dots, nanorods, and nanowires, have been intensively investigated for their important properties. Many methods have been described in the literature for the production of ZnO nanostructures, such as laser ablation, hydrothermal methods, electrochemical deposition, sol⁻gel methods, Chemical Vapour Deposition, molecular beam epitaxy, the common thermal evaporation method, and the soft chemical solution method. The present Special Issue is devoted to the Synthesis and Characterization of ZnO nanostructures with novel technological applications.
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Affiliation(s)
- Sotirios Baskoutas
- Department of Materials Science, University of Patras, 26500 Patras, Greece.
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Deng W, Long M, Zhou Q, Wen N, Deng W. One-step preparation of superhydrophobic acrylonitrile-butadiene-styrene copolymer coating for ultrafast separation of water-in-oil emulsions. J Colloid Interface Sci 2018; 511:21-26. [DOI: 10.1016/j.jcis.2017.09.070] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/16/2017] [Accepted: 09/19/2017] [Indexed: 11/25/2022]
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Strano V, Mirabella S. Low-cost and facile synthesis of Ni(OH) 2/ZnO nanostructures for high-sensitivity glucose detection. NANOTECHNOLOGY 2018; 29:015502. [PMID: 29115277 DOI: 10.1088/1361-6528/aa98ec] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An efficient electrode for non-enzymatic glucose detection is produced with low-cost techniques on a Cu wire. ZnO nanorods (NRs) were grown on a Cu wire by chemical bath deposition and were used as the substrate for pulsed electrodeposition of nanostructured Ni(OH)2 flakes. The effect of the electrodeposition potential on the final morphology and electrochemical behavior of the Ni(OH)2/ZnO/Cu structures is reported. ZnO NRs resulted to be well dressed by Ni(OH)2 flakes and were tested as glucose sensing electrodes in 0.1 M NaOH solution, showing high sensitivities (up to 3 mA mM-1 cm-2) and long-term stability. The presence of ZnO NRs was shown to improve the performance of the glucose sensor in terms of electrochemical stability over the time and sensitivity compared to Ni(OH)2/Cu sample. The reported data demonstrate a simple, versatile and low-cost fabrication approach for effective glucose sensing system within a urban mines framework.
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Affiliation(s)
- V Strano
- CNR-IMM MATIS, via S. Sofia 64, I-95123 Catania, Italy
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Gu J, Gu H, Zhang Q, Zhao Y, Li N, Xiong J. Sandwich-structured composite fibrous membranes with tunable porous structure for waterproof, breathable, and oil-water separation applications. J Colloid Interface Sci 2017; 514:386-395. [PMID: 29278794 DOI: 10.1016/j.jcis.2017.12.032] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/09/2017] [Accepted: 12/11/2017] [Indexed: 11/24/2022]
Abstract
HYPOTHESIS In general, microporous membranes with waterproofness, breathability, and oil-water separation performance are prepared from hydrophobic raw materials and demonstrated to exhibit an interconnected porous structure. Hence, constructing porous and gradient-structured composite membranes by integrating robust hydrophobic/lipophilic polyvinylidene fluoride (PVDF) and breathable polyurethane (PU) microporous membranes could help realize a selective separation process. EXPERIMENT Here, novel polyvinylidene fluoride-carbon nanotube/polyurethane/polyvinylidene fluoride-carbon nanotube (PVDF-CNT/PU/PVDF-CNT) sandwich-structured microporous membranes were fabricated by sequential electrospinning. The influence of the thickness ratios of PVDF/PU/PVDF and carbon nanotube (CNT) content on the fibrous construction, porous structure, and wettability of the composite membranes was systematically studied by scanning electron microscopy (SEM), pore size, porosity and contact angle. Significantly, the effect of the fibrous construction, porous structure, and wettability on the waterproofness, breathability, and oil-water separation ability of the composite membranes was investigated. FINDINGS The novel separation system proved the 'complementary effect' between the PVDF and PU membranes. Further, because of the elaborate gradient construction, superior porous structure, and robust hydrophobicity-oleophilicity, the resultant membranes exhibited moderate waterproofness (38 kPa) and excellent breathability (8.63 kg m-2 d-1), and oil-water separation, confirming that they could be promising alternatives for numerous practical applications, such as protective clothing, treatment of oil-contaminated water, and membrane distillation.
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Affiliation(s)
- Jiatai Gu
- Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Haihong Gu
- Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Qiong Zhang
- Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Yonghuan Zhao
- Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Ni Li
- Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China.
| | - Jie Xiong
- Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China.
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