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Cheng C, Dai J, Li Z, Feng W. Preparation and Magnetic Properties of CoFe 2O 4 Oriented Fiber Arrays by Electrospinning. MATERIALS 2020; 13:ma13173860. [PMID: 32882967 PMCID: PMC7504612 DOI: 10.3390/ma13173860] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/16/2020] [Accepted: 08/21/2020] [Indexed: 11/16/2022]
Abstract
The morphology of magnetic materials has a great influence on the properties, which is attributed to the magnetic anisotropy of the materials. Therefore, it is worth studying the fabrication of the aligned fiber and the change of its domain distribution. Nanoparticles and nanofibers were prepared by the hydrothermal and electrospinning methods, respectively. At the same time, the arranged nanofibers were collected by the drum collecting device. After the same annealing at 700 °C, it was found that the diameter of fibers collected by different collecting drums is similar. By studying the hysteresis loops of nanoarrays, it was found that they had strong anisotropy. The easy axis was parallel to the long axis, the Hc and Mr of the easy axis and the hard axis were 1330.5 Oe, 32.39 Am2/kg, and 857.2 Oe, 24.8 Am2/kg, respectively. Due to the anisotropy of the shape and the interaction between the particles, the Hc could not be enhanced. Therefore, the Ms and Hc of the nanoparticles were 80.23 Am2/kg and 979.3 Oe, respectively. The hysteresis loop and the change of magnetic moment during the demagnetization of the CoFe2O4 nanofiber array were simulated via micromagnetic software. The simulated Hc was 1480 Oe, which was similar to the experimental value.
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Affiliation(s)
- Chen Cheng
- School of Science, Lanzhou University of Technology, Lanzhou 730050, China; (C.C.); (W.F.)
| | - Jianfeng Dai
- School of Science, Lanzhou University of Technology, Lanzhou 730050, China; (C.C.); (W.F.)
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
- Correspondence:
| | - Zengpeng Li
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
- Key Laboratory of Solar Power System Engineering, Vocational and Technical College Jiuquan, Jiuquan 735000, China
| | - Wei Feng
- School of Science, Lanzhou University of Technology, Lanzhou 730050, China; (C.C.); (W.F.)
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Zhang M, Wu Z, Meng F, Lin H. Facile preparation of grass-like hierarchical structured γ-AlOOH coated stainless steel mesh with superhydrophobic and superoleophilic for highly efficient oil-water separation. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.08.069] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Wei W, Sun M, Zhang L, Zhao S, Wu J, Wang J. Underwater oleophobic PTFE membrane for efficient and reusable emulsion separation and the influence of surface wettability and pore size. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.07.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Wang C, Zhao M, Li J, Yu J, Sun S, Ge S, Guo X, Xie F, Jiang B, Wujcik EK, Huang Y, Wang N, Guo Z. Silver nanoparticles/graphene oxide decorated carbon fiber synergistic reinforcement in epoxy-based composites. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.049] [Citation(s) in RCA: 263] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Diouf D, Diouf A, Mortier C, Darmanin T, Dieng SY, Guittard F. Poly(3,4-propylenedioxypyrrole) Nanofibers with Branched Alkyl Chains by Electropolymerization to Obtain Sticky Surfaces with High Contact Angles. ChemistrySelect 2017. [DOI: 10.1002/slct.201701756] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Djibril Diouf
- Université Cheikh Anta Diop; Faculté des Sciences et Techniques; Département de Chimie, B.P.; 5005 Dakar Sénégal
| | - Alioune Diouf
- Université Cheikh Anta Diop; Faculté des Sciences et Techniques; Département de Chimie, B.P.; 5005 Dakar Sénégal
| | - Claudio Mortier
- Université Côte d'Azur; NICE Lab, IMREDD; Parc Valrose 06100 Nice France
| | - Thierry Darmanin
- Université Côte d'Azur; NICE Lab, IMREDD; Parc Valrose 06100 Nice France
| | - Samba Yandé Dieng
- Université Cheikh Anta Diop; Faculté des Sciences et Techniques; Département de Chimie, B.P.; 5005 Dakar Sénégal
| | - Frédéric Guittard
- Université Côte d'Azur; NICE Lab, IMREDD; Parc Valrose 06100 Nice France
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Qiu S, Xia Y, Yang J. Robust Superhydrophobic Nickel Micro/nanostructures on Steel Surfaces with Excellent Anti-corrosion and Tribological Properties. CHEM LETT 2017. [DOI: 10.1246/cl.170694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shu Qiu
- School of Chemical and Material Engineering, Zhenjiang College, Zhenjiang 212000, P. R. China
- Zhenjiang Key Laboratory of Functional Chemistry, Zhenjiang 212000, P. R. China
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yunfei Xia
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Jin Yang
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
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The design of superhydrophobic stainless steel surfaces by controlling nanostructures: A key parameter to reduce the implantation of pathogenic bacteria. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 73:40-47. [PMID: 28183625 DOI: 10.1016/j.msec.2016.11.115] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/03/2016] [Accepted: 11/24/2016] [Indexed: 01/31/2023]
Abstract
Reducing bacterial adhesion on substrates is fundamental for various industries. In this work, new superhydrophobic surfaces are created by electrodeposition of hydrophobic polymers (PEDOT-F4 or PEDOT-H8) on stainless steel with controlled topographical features, especially at a nano-scale. Results show that anti-bioadhesive and anti-biofilm properties require the control of the surface topographical features, and should be associated with a low adhesion of water onto the surface (Cassie-Baxter state) with limited crevice features at the scale of bacterial cells (nano-scale structures).
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Yan H, Zhou H, Ye Q, Wang X, Cho CM, Tan AYX, Xu J. Engineering polydimethylsiloxane with two-dimensional graphene oxide for an extremely durable superhydrophobic fabric coating. RSC Adv 2016. [DOI: 10.1039/c6ra14362h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A type of nanostructured material comprising reduced graphene oxide (RGO) modified polydimethylsiloxane (PDMS) for fabric coating is described.
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Affiliation(s)
- Hong Yan
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Hui Zhou
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Qun Ye
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Xiaobai Wang
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Ching Mui Cho
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Angeline Yan Xuan Tan
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Jianwei Xu
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
- Department of Chemistry
- National University of Singapore
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Guo J, Yang F, Guo Z. Fabrication of stable and durable superhydrophobic surface on copper substrates for oil-water separation and ice-over delay. J Colloid Interface Sci 2015; 466:36-43. [PMID: 26704474 DOI: 10.1016/j.jcis.2015.12.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/30/2015] [Accepted: 12/08/2015] [Indexed: 11/28/2022]
Abstract
We report a simple and rapid method to fabricate superhydrophobic films on copper substrates via Fe(3+) etching and octadecanethiol (ODT) modification. The etching process can be as short as 5 min and the ODT treatment only takes several seconds. In addition, the whole process is quite flexible in reaction time. The superhydrophobicity of as-prepared surfaces is mechanically durable and chemically stable, which have great performance in oil-water separation and ice-over resistance.
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Affiliation(s)
- Jie Guo
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Fuchao Yang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Zhiguang Guo
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
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Yu Z, Ni J, Fang L, Wu D, Zhu H. Multilayer Three-Dimensional Structure Made of Modified Stainless Steel Mesh for in Situ Continuous Separation of Spilled Oil. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b02154] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ziya Yu
- Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Jun Ni
- Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Linlin Fang
- Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Daxiong Wu
- Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Haitao Zhu
- Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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Godeau G, N’Na J, Darmanin T, Guittard F. Azidomethyl-EDOT as a Platform for Tunable Surfaces with Nanostructures and Superhydrophobic Properties. J Phys Chem B 2015; 119:6873-7. [DOI: 10.1021/acs.jpcb.5b03462] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Guilhem Godeau
- University
Nice Sophia Antipolis, CNRS,
LPMC, UMR 7336, 06100 Nice, France
| | - Jessica N’Na
- University
Nice Sophia Antipolis, CNRS,
LPMC, UMR 7336, 06100 Nice, France
| | - Thierry Darmanin
- University
Nice Sophia Antipolis, CNRS,
LPMC, UMR 7336, 06100 Nice, France
| | - Frédéric Guittard
- University
Nice Sophia Antipolis, CNRS,
LPMC, UMR 7336, 06100 Nice, France
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12
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Impact of air and water vapor environments on the hydrophobicity of surfaces. J Colloid Interface Sci 2015; 453:177-185. [PMID: 25985421 DOI: 10.1016/j.jcis.2015.04.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 04/27/2015] [Indexed: 11/22/2022]
Abstract
HYPOTHESIS Droplet wettability and mobility play an important role in dropwise condensation heat transfer. Heat exchangers and heat pipes operate at liquid-vapor saturation. We hypothesize that the wetting behavior of liquid water on microstructures surrounded by pure water vapor differs from that for water droplets in air. EXPERIMENTS The static and dynamic contact angles and contact angle hysteresis of water droplets were measured in air and pure water vapor environments inside a pressure vessel. Pressures ranged from 60 to 1000 mbar, with corresponding saturation temperatures between 36 and 100°C. The wetting behavior was studied on four hydrophobic surfaces: flat Teflon-coated, micropillars, micro-scale meshes, and nanoparticle-coated with hierarchical micro- and nanoscale roughness. FINDINGS Static advancing contact angles are 9° lower in the water vapor environment than in air on a flat surface. One explanation for this reduction in contact angles is water vapor adsorption to the Teflon. On microstructured surfaces, the vapor environment has little effect on the static contact angles. In all cases, variations in pressure and temperature do not influence the wettability and mobility of the water droplets. In most cases, advancing contact angles increase and contact angle hysteresis decreases when the droplets are sliding or rolling down an inclined surface.
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Zhang G, Hu J, Tu Y, He G, Li F, Zou H, Lin S, Yang G. Preparation of superhydrophobic films based on the diblock copolymer P(TFEMA-r-Sty)-b-PCEMA. Phys Chem Chem Phys 2015; 17:19457-64. [DOI: 10.1039/c5cp02751a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The diblock copolymer P(TFEMA-r-Sty)-b-PCEMA was synthesized and self-assembled to form spherical micelles. Photo-cross-linking the PCEMA domains of these micelles yielded cross-linked nanoparticles. The cross-linked nanoparticles were used to prepare superhydrophobic films.
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Affiliation(s)
- Ganwei Zhang
- Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization
- Huanggang Normal University
- Huanggang
- P. R. China
- Guangzhou Institute of Chemistry
| | - Jiwen Hu
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
| | - Yuanyuan Tu
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
| | - Guping He
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
| | - Fei Li
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
| | - Hailiang Zou
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
| | - Shudong Lin
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
| | - Gonghua Yang
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou
- P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry
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