Particle electrification and levitation in a continuous particle feed and dispersion system with vibration and external electric fields

Shoyama, Mizuki; Kawata, Takumu; Yasuda, Masatoshi; Matsusaka, Shuji

doi:10.1016/j.apt.2018.04.022

Cited by 16 publications

(12 citation statements)

References 27 publications

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“…Additionally, the TM NPs can be dispersed in the PLCL ber without a dispersant because the high surface charge density of TM NPs causes electrostatic repulsion among them, which contributes to their dispersion in PLCL solution. 29 Therefore, the uniform dispersion was directly related to the increase in TM NP contents in the composite solution and spun bers. Additionally, the crystal structure of TM NPs in 8 wt% TM NPs/PLCL was detected (ESI Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Secondly, the unique surface and small size effect of the nano-size could impact the physical and chemical interaction between uniformly distributed nanoparticles. 29 When the substrate was subjected to an external force, the entanglement point inhibited the sliding of the molecular chain. 30 Finally, nanoparticles could also act as stress concentration points to prevent further cracking.…”

Section: Resultsmentioning

confidence: 99%

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Effect of tourmaline nanoparticles on the anticoagulation and cytotoxicity of poly(l-lactide-co-caprolactone) electrospun fibrous membranes

Zhao

Zhang

et al. 2019

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effect of tourmaline nanoparticles on the anticoagulation and cytotoxicity of poly(l-lactide-co-caprolactone) electrospun fibrous membranes

Zhao

Zhang

et al. 2019

RSC Adv.

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“…The induction charging, agglomeration, levitation, and other behaviors resulting from particle layers in electric fields have been studied in detail Matsusaka, 2017, 2019;. Furthermore, a new system has been proposed for the continuous feeding of dispersed particles using electric fields and vibration (Shoyama et al, 2018). Based on previous studies, this review paper summarizes the mechanisms of induction charging, the control of particle behavior, and the concept of its application.…”

Section: Introductionmentioning

confidence: 99%

Agglomeration and Dispersion Related to Particle Charging in Electric Fields

Shoyama

Matsusaka

2021

KONA

Self Cite

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Electrostatic forces cause spontaneous movement of charged particles; subsequently, electrostatic technology is attracting attention because of its application in powder handling processes, such as separation, classification, dispersion, and collection. Dielectric and conductive particles are charged by induction in a strong electric field and moved by Coulomb forces. The magnitude and polarity of the transferred charges are controlled by the strength and direction of the electric field. The dielectric particles are also polarized in the electric field, and dipole interactions occur between particles or in the particle layers, complicating the particle behavior. This review paper presents induction charging, agglomeration, levitation, and other behaviors resulting from particle layers in electric fields. A series of particle phenomena occur in parallel electrode systems, which consist of a lower plate electrode and an upper mesh electrode. Charged agglomerates are formed on the particle layers, levitated by the Coulomb forces, and disintegrated with rotation when approaching the mesh electrode. The mechanisms of agglomeration and disintegration have been elucidated in multiple studies, including microscopic observations and theoretical analyses of particle motion, based on numerical calculations of the electric field. Furthermore, a new system is proposed for continuous feeding of dispersed particles using electric fields and vibration.

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“…Nowadays, technology is often focused on magnetostatic levitation arising in the presence of magnets for communications purposes [6 ], magnetic separations [7, 8 ], medicine (levitation of bacteria, antibiotic treatments), and some laboratory investigations [9 ]. There are also technologies that apply static levitations arising without capacitances or magnets [10 ]. The paper considers both electrostatic and magnetostatic levitations driven only by material forces acting on dielectric, paramagnetic, and ferromagnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic and magnetostatic levitations of ball – forces, stability and oscillations frequencies

Spałek

2020

IET Science, Measurement &Amp; Technology

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The study presents approaches to both electrostatic and magnetostatic levitations. For anisotropic balls, both dielectric and magnetic field distributions are derived in analytical forms by means of the variable separation method. Distributions are given by power functions and polynomials either Legendre's (for the electrostatic problem) or the associated polynomials (for the magnetostatic problem). The levitation forces are evaluated by means of four methods, i.e. Maxwell stress tensor generalised method, co‐energy method, material force density, and equivalent dipole analysis for both levitations. Levitation forces versus either electric permittivity or magnetic permeability are presented. The stability of the equilibrium points is investigated. The frequencies of free and damped oscillations are evaluated.

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Particle electrification and levitation in a continuous particle feed and dispersion system with vibration and external electric fields

Cited by 16 publications

References 27 publications

Effect of tourmaline nanoparticles on the anticoagulation and cytotoxicity of poly(l-lactide-co-caprolactone) electrospun fibrous membranes

Effect of tourmaline nanoparticles on the anticoagulation and cytotoxicity of poly(l-lactide-co-caprolactone) electrospun fibrous membranes

Agglomeration and Dispersion Related to Particle Charging in Electric Fields

Electrostatic and magnetostatic levitations of ball – forces, stability and oscillations frequencies

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