Highly thermally conductive and insulating composites fabricated through the hot-pressing of hollow structured h-BN/rGO hybrid filler
- Authors
- Cho, Jangwoo; Su, Pei-Chen; Kim, Jooheon
- Issue Date
- Apr-2024
- Publisher
- Elsevier Ltd
- Keywords
- Hexagonal boron nitride; Hybrid filler; Reduced graphene oxide; Thermal conductivity; Volume resistivity
- Citation
- Applied Materials Today, v.37
- Journal Title
- Applied Materials Today
- Volume
- 37
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/73040
- DOI
- 10.1016/j.apmt.2024.102149
- ISSN
- 2352-9407
- Abstract
- Polymer composites have several advantages: affordability, ease of processing, and versatile applications. In this study, hexagonal boron nitride (h-BN)/epoxy spheres were fabricated using NaCl, then washing away the NaCl with water to create h-BN/epoxy hollow structures. Reduced graphene oxide (r-GO) was subsequently wrapped around these structures to produce h-BN/r-GO/epoxy hollow structures. These structures were then fabricated into composites through a hot pressing method involving high pressure and heat, which achieved a vertical alignment of the h-BN components to establish a heat transfer path, with r-GO evenly dispersed throughout. The thermal conductivity of the h-BN/r-GO/epoxy composite was measured as 4.12 W/m·K, representing a 2060 % increase compared to that of neat epoxy. Despite incorporating electrically conductive r-GO, the h-BN/r-GO/epoxy composite maintained its insulating properties. This is attributed to the even distribution of insulating h-BN within the h-BN/r-GO/epoxy hollow structures. © 2024
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