ScholarWorks@중앙대학교

초록

Efficient thermal management is critical for advanced electronic devices; however, conventional phase change materials (PCMs) are constrained by low thermal conductivity, leakage, and inadequate structural stability. In this study, multifunctional PCM composites were developed by incorporating SiO2-encapsulated lauric acid (ELA) and a polymeric diphenylmethane diisocyanate-cured boron nitride-cellulose nanofiber aerogel scaffold (pBC) into a xylitol-bisphenol A epoxy (XYBPA) matrix. In this system, ELA confers a high latent-heat capacity, whereas the pBC scaffold concomitantly establishes continuous thermal pathways and enhances leakage resistance. The XYBPA matrix further promoted structural cohesion through covalent crosslinking. The optimized composite (ELA:pBC = 1:2) exhibited a thermal conductivity of 5.379 W/m center dot K at 50 vol% loading and retained a latent heat capacity exceeding 90 J/g while also demonstrating excellent leakage resistance up to 140 degrees C and enhanced mechanical toughness. Overall, this synergistic design strategy provides a practical solution to the long-standing trade-off between energy storage and heat dissipation, underscoring the potential of these composites as thermal interface materials for next-generation electronic thermal management.

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