Thermal expansion of graphene composites

Shiren Wang, Madhava Tambraparni, Jingjing Qiu, John Tipton, Derrick Dean

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Abstract

Isolated graphene sheets were achieved by graphite intercalation and charge-induced exfoliation. The resultant graphene oxide sheets were incorporated into polymer composites and thermalexpansion was investigated by a thermo-mechanical analyzer. The test results indicated that inclusion of graphene into composites resulted in low coefficients of thermal expansion (CTEs), and increasing graphene fraction reduced CTEs more significantly. The 5 wt % graphene oxide-based composite shows 31.7% reduction below the glass transition temperature. Preliminary measurement of thermal conductivity also indicated that graphene composites significantly improved the thermal conductivity of polymer matrix. Thermal conductivity of 5% graphene composites showed about 4-fold increment in comparison to the polymer matrix. This finding will provide a solid foundation for graphene-enabled thermal management in microelectronics.

Original languageEnglish
Pages (from-to)5251-5255
Number of pages5
JournalMacromolecules
Volume42
Issue number14
DOIs
StatePublished - Jul 28 2009

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Wang, S., Tambraparni, M., Qiu, J., Tipton, J., & Dean, D. (2009). Thermal expansion of graphene composites. Macromolecules, 42(14), 5251-5255. https://doi.org/10.1021/ma900631c