Effects of Modified Graphite on Thermal Properties of Modified Graphite/CA-MA/PMMA Composite for Latent Heat Thermal Energy Storage

Abstract:

The aim of this work is to prepare a kind of polymer-based form-stable PCM with a higher thermal conductivity. Graphite powders modified by titanate coupling agent were chosen as the thermal conductivity enhancer. The modified graphite(MG) and capric acid(CA)-myristic acid(MA) eutectic as thermal absorbing material were blended into the poly-methyl methacrylate (PMMA) serving as supportive matrix during the bulk-polymerization process of MMA. The composite PCMs with different MG mass fraction (2%, 5%, 7%, 10% and 15%) were characterized by SEM, DSC technique, volume expansibility measurement and mechanical test. Thermal conductivities of the composites were measured by transient hot-wire method. The results indicate that the MG/CA-MA/PMMA composites keep the good thermal storage performance while the thermal expansibility becomes weaker. Thermal conductivity of the composite PCM has been enhanced significantly.

• Periodical: Advanced Materials Research (Volumes 562-564)
• Pages: 401-404
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.562-564.401
• Online since: August 2012
• Authors: Duo Meng
• Keywords: Form-Stable Composite Phase Change Material, Modified Graphite, Thermal Conductivity (TC), Thermal Expansibility

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