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- Title
Sugar‐template method to construct a boron nitride filler network to enhance the thermal conductivity of epoxy composites.
- Authors
Wang, Yifan; Yu, Zhiqiang
- Abstract
In this work, a technique for constructing a three‐dimensional (3D) skeleton of hexagonal boron nitride (h‐BN) using sugar as the fulcrum and preparing composites by embedding in the epoxy (EP) in a vacuum environment is proposed. The study of thermal conductivity (TC) in polymer composites is conducted through a blend of techniques: laser flashing, theoretical modeling, and finite element simulation. The h‐BN skeleton exhibits a honeycomb structure through the scanning electron microscopy findings. Further investigation using finite element simulation demonstrates that conductive networks are formed by the h‐BN skeleton within the composites, leading to a notable enhancement in TC. Specifically, the composite for h‐BN/EP reaches a TC of 2.25 W/m K when composed of 52 vol% h‐BN. A dielectric loss of 0.008 for the composite with the same h‐BN loading shows a considerable improvement. The compressive yield strength of the 3D h‐BN/EP composites reached 312 MPa at 5 vol% h‐BN loading.
- Subjects
THERMAL conductivity; EPOXY resins; CONDUCTING polymer composites; HONEYCOMB structures; BORON nitride; DIELECTRIC loss; SUGAR
- Publication
Journal of Applied Polymer Science, 2024, Vol 141, Issue 27, p1
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.55612