Dielectric and thermal properties of epoxy resins with TiO2 nanowires

Cheng, Yonghong; Chen, Siyu; Wu, Guanglei; Jia, Zirui

doi:10.1007/s10854-017-7728-2

Cited by 15 publications

(14 citation statements)

References 47 publications

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“…Both these features can be enhanced by filling the epoxy resin with adequate particles. Besides the kind of filler, also the grain size, content and alignment in the matrix strongly influence the final properties of the polymer composite [4][5][6][7][8][9][10][11]. One of the most common kind of filler used for the epoxy system is the quartz flour [5,6,8,9].…”

Section: Introductionmentioning

confidence: 99%

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

Rybak

Nieroda

2018

Polymer Composites

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Material used as an electrical insulation has to combine many features, mainly dielectric, mechanical, and thermal parameters should be preserved. Appropriately selected polymer matrix and a suitable filler allow to obtain a multifunctional material for electrical devices. In the presented work, different types of commercial aluminosilicate fillers were used in order to obtain electrical insulation with enhanced properties in relation to reference silica‐epoxy resin composite. Thermal conductivity, mechanical parameters, dielectric properties and structure‐properties relationship were studied in order to examine the influence of size, amount and type of silanization of the filler. Composites filled with aluminosilicates exhibit much better mechanical properties as well as enhanced dielectric properties with 61% relative increase of thermal conductivity when they were compared with silica‐epoxy resin sample. The obtained results indicate that aluminosilicates are very attractive fillers for epoxy‐based composites used as an electrical insulation in power devices. POLYM. COMPOS., 40:3182–3188, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

Rybak

Nieroda

2018

Polymer Composites

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“…In addition, Xie et al demonstrated the effect of particle shape on the relative permittivity. Spherical nanoparticles of TiO 2 (1–4 wt%) showed a small increase in the permittivity of neat epoxy (up to 4.2 at 0.1 Hz), while TiO 2 nanowires at the same load resulted in a much larger increase in permittivity (up to 5.25 at 0.1 Hz) . The specific surface areas of the nanowires and nanoparticles were measured to be 39.8 and 82.6 m 2 g −1 , respectively.…”

Section: The Structure–property Relations In Epoxy Nanocompositesmentioning

confidence: 99%

“…Kochetov et al attributed this effect to phonon scattering on the larger surface area of nanoparticles, but this cannot be determined conclusively . Xie et al investigated the changes in thermal conductivity for epoxy nanocomposites with TiO 2 nanoparticles and nanowires. The thermal conductivity increased with increasing filler load in both cases, but the increase was larger for nanowires.…”

Section: The Structure–property Relations In Epoxy Nanocompositesmentioning

confidence: 99%

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Epoxy‐Based Nanocomposites for High‐Voltage Insulation: A Review

Adnan

Tveten

Glaum

et al. 2018

Adv Elect Materials

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Epoxy nanocomposites, with inorganic oxide nanoparticles as filler, can exhibit novel property combinations, such as enhanced mechanical strength, higher thermal conductivity, increased dielectric breakdown strength, and reduced complex permittivity. Therefore, they have interesting applications in nanodielectrics, such as high‐voltage insulation materials or in microelectromechanical systems. The primary challenge in the processing of nanocomposites is achieving a homogeneous dispersion of the nanoparticles. The dispersion quality affects the interfaces between the organic and the inorganic components, which can determine the final properties of the nanocomposite. Here, the processing methods and the resulting dielectric, mechanical, and thermal properties of epoxy nanocomposites with inorganic oxide fillers are presented. Functionalization of the nanoparticle generally improves the dispersion of the particles in the polymer matrix. Different oxide fillers are observed to have similar effects on the properties of the nanocomposites. Epoxy‐based nanocomposites exhibit improved dielectric breakdown strength and lower complex permittivity with inorganic oxide nanoparticles at low filler contents, compared to conventional composites with micrometer‐sized particles. While there are some inconsistencies in the findings, which may be attributed to differences in the dispersion quality, an improved understanding of the nanoparticle–epoxy interfaces in nanocomposites will enable tailoring of the desired properties, opening new avenues for application.

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“…In addition, the poor thermal conductivity of epoxy resin hinders its application in the field of electronic packaging . Various nanoparticles (such as nano‐alumina, nano‐silica, nano‐titanium dioxide, etc.) have been added into epoxy resin to improve the mechanical property, thermal conductivity, dielectric property and wear resistance by researchers.…”

Section: Introductionmentioning

confidence: 99%

The Side‐Chain Liquid Crystalline Epoxy Polymer Grafted Nanoparticles for the Thermal and Mechanical Enhancement of Epoxy Nanocomposites

Shen

Zhang

et al. 2019

ChemistrySelect

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In order to enhance the dispersion and the interface in epoxy nanocomposites filled nanoparticles, a novel side‐chain liquid crystalline epoxy polymer (SLCEP) was synthesized. The SLCEP grafted to alumina (Al2O3) surfaces via the carboxyl group for dispersing nanoparticles, bonded covalently with the epoxy matrix by the epoxy group for interface improvement and maintained good liquid crystal properties by the mesogenic unit. The dispersity of Al2O3 in Al2O3‐SLCEP and epoxy nanocomposites were studied by Fourier transform infrared imaging system and field emission scanning electron microscopy. The interface of epoxy nanocomposites was researched by observing the fracture morphology. By preventing the agglomeration of Al2O3 and strengthening its interfacial bonding with the matrix, the glass transition temperature and thermal stability of Al2O3‐SLCEP/epoxy nanocomposites were improved distinctly, and Al2O3‐SLCEP/epoxy nanocomposites were much superior to neat epoxy in mechanical properties. The excellent performance of SLCEP modified nanoparticles in epoxy demonstrates that is an effective general approach for nanoparticle/polymer.

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Dielectric and thermal properties of epoxy resins with TiO2 nanowires

Cited by 15 publications

References 47 publications

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

Epoxy‐Based Nanocomposites for High‐Voltage Insulation: A Review

The Side‐Chain Liquid Crystalline Epoxy Polymer Grafted Nanoparticles for the Thermal and Mechanical Enhancement of Epoxy Nanocomposites

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