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Assoumou Nzue RM, Mandatsy Moungomo JB, Mombo Boussougou YC, Obame Ndong E, Traoré Ndama A. Comparison between experimental results and three models of particle tribocharging during dilute-phase pneumatic conveying. Particulate Science and Technology 2023. [DOI: 10.1080/02726351.2023.2192698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- Rolland Michel Assoumou Nzue
- Masuku Electrical Engineering Laboratory (M2elab), Ecole Polytechnique Masuku de l’Université des Sciences et Techniques de Masuku, Franceville, Gabon
| | | | - Yves Constant Mombo Boussougou
- Masuku Electrical Engineering Laboratory (M2elab), Ecole Polytechnique Masuku de l’Université des Sciences et Techniques de Masuku, Franceville, Gabon
| | - Elysée Obame Ndong
- Masuku Electrical Engineering Laboratory (M2elab), Ecole Polytechnique Masuku de l’Université des Sciences et Techniques de Masuku, Franceville, Gabon
| | - Adoum Traoré Ndama
- Masuku Electrical Engineering Laboratory (M2elab), Ecole Polytechnique Masuku de l’Université des Sciences et Techniques de Masuku, Franceville, Gabon
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Zhou Q, Bi X, Zhang P, Hu J, Liang C, Chen X, Ma J. A study of charging characteristics of binary mixture of polyolefin particles by using horizontal airflow to separate large and small particles. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2023.118399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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Tan C, Xu R, Zhang Q. Revisiting Contact Electrification at Polymer-Liquid Interfaces. Langmuir 2022; 38:11882-11891. [PMID: 36122176 DOI: 10.1021/acs.langmuir.2c01376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Contact electrification (CE) occurs naturally at all interfaces between solids and solids, solids and liquids, solids and gasses, and so forth. It has been extensively studied for decades. While CE at a solid-solid interface has been demonstrated to be primarily caused by electron transfer, the underlying mechanism of CE at a liquid-solid interface remains controversial. In this paper, the CE process between polyethylene terephthalate (PET) and different inorganic solutions at different temperatures is studied to investigate the charge transfer mechanism. The observed temperature-CE charge relationship falls into two categories, that is, the general case and the special case. In the general case, the CE charge first increases negatively and then positively with the temperature. The CE charge increasing negatively could result from enhanced electron transfer at the interface, while the CE charge increasing positively may be caused by increasing adsorption of cations, which neutralize the negative charges on the PET surface. In contrast, the CE charge first increases positively and then negatively with the temperature in the special case. The CE charge increasing positively could be attributed to more cations being attracted to the negatively charged PET surface, while the charge increasing negatively may be caused by more anions being attracted to the PET due to enhanced cation adsorption. Supported by the surface charge and dynamic charge transfer at different PET-solution interfaces and solution temperatures, our study provides a plausible interpretation of the temperature-dependent CE at the polymer-liquid interfaces.
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Affiliation(s)
- Chen Tan
- National Junior College, Singapore 288913, Singapore
- Centre of Micro-/Nanoelectronics (CMNE), School of Electrical and Electronic Engineering Nanyang Technological University, Singapore 639798, Singapore
| | - Ran Xu
- Centre of Micro-/Nanoelectronics (CMNE), School of Electrical and Electronic Engineering Nanyang Technological University, Singapore 639798, Singapore
| | - Qing Zhang
- Centre of Micro-/Nanoelectronics (CMNE), School of Electrical and Electronic Engineering Nanyang Technological University, Singapore 639798, Singapore
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Abstract
Triboelectricity has been known since antiquity, but the fundamental science underlying this phenomenon lacks consensus. We present a flexoelectric model for triboelectricity where contact deformation induced band bending at the nanoscale is the driving force for charge transfer. This framework is combined with first-principles and finite element calculations to explore charge transfer implications for different contact geometry and materials combinations. We demonstrate that our ab initio based formulation is compatible with existing empirical models and experimental observations including charge transfer between similar materials and size/pressure dependencies associated with triboelectricity.
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Affiliation(s)
- Christopher A Mizzi
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Laurence D Marks
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
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Lin S, Xu L, Xu C, Chen X, Wang AC, Zhang B, Lin P, Yang Y, Zhao H, Wang ZL. Electron Transfer in Nanoscale Contact Electrification: Effect of Temperature in the Metal-Dielectric Case. Adv Mater 2019; 31:e1808197. [PMID: 30844100 DOI: 10.1002/adma.201808197] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/29/2019] [Indexed: 05/27/2023]
Abstract
The phenomenon of contact electrification (CE) has been known for thousands of years, but the nature of the charge carriers and their transfer mechanisms are still under debate. Here, the CE and triboelectric charging process are studied for a metal-dielectric case at different thermal conditions by using atomic force microscopy and Kelvin probe force microscopy. The charge transfer process at the nanoscale is found to follow the modified thermionic-emission model. In particular, the focus here is on the effect of a temperature difference between two contacting materials on the CE. It is revealed that hotter solids tend to receive positive triboelectric charges, while cooler solids tend to be negatively charged, which suggests that the temperature-difference-induced charge transfer can be attributed to the thermionic-emission effect, in which the electrons are thermally excited and transfer from a hotter surface to a cooler one. Further, a thermionic-emission band-structure model is proposed to describe the electron transfer between two solids at different temperatures. The findings also suggest that CE can occur between two identical materials owing to the existence of a local temperature difference arising from the nanoscale rubbing of surfaces with different curvatures/roughness.
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Affiliation(s)
- Shiquan Lin
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Liang Xu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Cheng Xu
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Xiangyu Chen
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Aurelia C Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Binbin Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Pei Lin
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ya Yang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Huabo Zhao
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
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