Online optical and dielectric monitoring of anisotropic epoxy/BaTiO<sub>3</sub>composite formation tailored by dielectrophoresis

Belijar, Guillaume; Diaham, Sombel; Valdez-Nava, Zarel; Lebey, Thierry

doi:10.1088/0022-3727/49/4/045501

Cited by 13 publications

(10 citation statements)

References 27 publications

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“…8 Page 1 of 12 AUTHOR SUBMITTED MANUSCRIPT -JPhysD-118536 .R1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 A c c e p t e d M a n u s c r i p t Journal XX (XXXX) XXXXXX Author et al 2 Many different electrical properties have also been examined in the broad context of nanocomposites. For example, the dielectric constant of an epoxy thermoset was modified by the incorporation of different oxides systems (titanium dioxide, TiO2, and barium titanate, BaTiO3), 9,10 aluminium flakes, 11 and nano-silica particles. 12 A key feature of the evolution of power systems has been a progressive increase in operating voltage, such that values in excess of 1 MV now constitute a proven technology in some situations.…”

Section: Introductionmentioning

confidence: 99%

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Saeedi¹,

Vaughan²,

Andritsch³

2019

J. Phys. D: Appl. Phys.

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Epoxy resins are widely used as the primary insulation material in many demanding energyrelated applications. As such, the ability specifically to tailor the electrical performance of such systems to meet increasingly demanding insulation situations has considerable utility. This paper describes a new approach to this problem, which is based upon the controlled introduction of specific functional groups into the cured resin's network architecture. Here, two additives are considered, termed functional network modifiers (FNM), namely glycidyl hexadecyl ether and glycidyl 4-nonylphenyl ether; in all the investigated systems, the ideal stoichiometric ratio of epoxide groups to amine hydrogens is retained. In the case of both FNM, their inclusion resulted in a progressive reduction in the glass transition temperature T g of the system, a reduction in the real part of the permittivity and reduced dielectric losses wihin the accessible frequency range, increased DC conductivity and increased AC breakdown strength. The magnitude of the observed effects are found to be dependent upon the choice of functional modifier, which suggests that such changes are not related merely to the inclusion of an additive within the system, but are also influenced by the chemistry of the additive itself. Explanations for these effects are proposed. It is concluded that the use of such FNM at low concentrations (~4% in the work reported here) offers a novel alternative means of engineering advanced materials to meet the current and future needs in an adaptable and easily implemented manner.

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Section: Introductionmentioning

confidence: 99%

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Saeedi¹,

Vaughan²,

Andritsch³

2019

J. Phys. D: Appl. Phys.

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“…Although objects with high permittivity are unusual in water treatment, in order to reversely verify the DEP mechanism for membrane antifouling, the barium titanate (BaTiO 3 ) particles (ζ = −4.46 ± 1.29 mV) are selected as model colloids with a relative permittivity of 2000, − which is much larger than that of water (78). All the procedures including electric fields and conductive solution and methods for numerical treatment were the same as those of SiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Dielectrophoresis-Based Universal Membrane Antifouling Strategy toward Colloidal Foulants

Liu

Xia

Zhao

et al. 2022

Environ. Sci. Technol.

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Membrane fouling compromises the benefits of membrane technology, leading to its performance deterioration and incremental cost.Coupling with an electric field has been attractive but is limited by the electrical dependence of the electrophoresis (EP) mechanism and undesired faradic reactions. This study reports a universal dielectrophoresis-based (DEP) membrane antifouling strategy for electronegative, electropositive, and neutral colloidal foulants, which depends on the particle polarizability rather than its charge. The porous Ni@PVDF model electroconductive membrane was fabricated to construct a nonuniform electric field inducing DEP, while applying a low voltage avoided side electrochemical reactions. For electronegative SiO 2 (−) and electropositive Al 2 O 3 (+) particles with a lower relative permittivity than the medium water (78), the membrane permeability all remarkably increased by 90.1% under AC/DC (±1.0 V) fields. By contrast, serious membrane fouling occurred for the BaTiO 3 colloids with a higher relative permittivity (∼2000). Notably, the permittivity of nearly all colloids in wastewater treatment is much less than that of water, which makes the dielectrophoresis-based antifouling strategy universal. The theoretical simulation systematically analyzed the forces on particles including DEP, EP, and others, indicating that the formed protected area on the membrane pore wall by DEP forces prevented the irreversible membrane blockage of colloids and facilitated loose cake layer formation for alleviating membrane fouling. In brief, this work reported a hopeful concept for dielectrophoresis-based membrane antifouling and verified its antifouling mechanism.

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“…It is currently used to align fillers including carbon nanotubes, graphite, glass fibers, ceramic, in polymer resins using both AC and DC fields. [ 159–163 ] The application of DEP to 3D printing, with the ability to uniformly align dielectric particles in specific areas, enables the forming of reinforced composites with complex internal architectures. Yang et al.…”

Section: Field Assisted 3d Printing Of Bioinspired Compositesmentioning

confidence: 99%

“…It is currently used to align fillers including carbon nanotubes, graphite, glass fibers, ceramic, in polymer resins using both AC and DC fields. [159][160][161][162][163] The application of DEP to 3D printing, with the ability to uniformly align dielectric particles in specific areas, enables the forming of reinforced composites with complex internal architectures. Yang et al proposed an electroassisted 3D printing strategy approach using a rotating electric field to control the alignment of surface-modified multi-walled carbon nanotubes (MWCNT-S) during the printing process.…”

Section: Electric Field Assisted 3d Printingmentioning

confidence: 99%

Advances in Field‐Assisted 3D Printing of Bio‐Inspired Composites: From Bioprototyping to Manufacturing

Zhou

Ren

Liu

et al. 2021

Macromolecular Bioscience

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Biocomposite systems evolve to superior structural strategies in adapting to their living environments, using limited materials to form functionality superior to their inherent properties. The synergy of physical-field and Three-dimensional (3D) printing technologies creates unprecedented opportunities that overcome the limitations of traditional manufacturing methods and enable the precise replication of bio-enhanced structures. Here, an overview of typical structural designs in biocomposite systems, their functions and properties, are provided and the recent advances in bio-inspired composites using mechanical, electrical, magnetic, and ultrasound-field-assisted 3D printing techniques are highlighted. Finally, in order to realize the preparation of bionic functional devices and equipment with more superior functions, here an outlook on the development of field-assisted 3D printing technology from three aspects are provided: Materials, technology, and post-processing.

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Online optical and dielectric monitoring of anisotropic epoxy/BaTiO₃composite formation tailored by dielectrophoresis

Cited by 13 publications

References 27 publications

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Dielectrophoresis-Based Universal Membrane Antifouling Strategy toward Colloidal Foulants

Advances in Field‐Assisted 3D Printing of Bio‐Inspired Composites: From Bioprototyping to Manufacturing

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Online optical and dielectric monitoring of anisotropic epoxy/BaTiO3composite formation tailored by dielectrophoresis

Cited by 13 publications

References 27 publications

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Dielectrophoresis-Based Universal Membrane Antifouling Strategy toward Colloidal Foulants

Advances in Field‐Assisted 3D Printing of Bio‐Inspired Composites: From Bioprototyping to Manufacturing

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Product

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About

Online optical and dielectric monitoring of anisotropic epoxy/BaTiO₃composite formation tailored by dielectrophoresis