Thermal conductivity enhancement of laser induced graphene foam upon P3HT infiltration

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dc.citation.articleNumber253107
dc.citation.issueNumber25en_US
dc.citation.journalTitleApplied Physics Lettersen_US
dc.citation.volumeNumber109en_US
dc.contributor.authorSmith, M.K.en_US
dc.contributor.authorLuong, D.X.en_US
dc.contributor.authorBougher, T.L.en_US
dc.contributor.authorKalaitzidou, K.en_US
dc.contributor.authorTour, J.M.en_US
dc.contributor.authorCola, B.A.en_US
dc.contributor.orgNanoCarbon Centeren_US
dc.date.accessioned2017-05-22T17:16:48Z
dc.date.available2017-05-22T17:16:48Z
dc.date.issued2016en_US
dc.description.abstractSignificant research has been dedicated to the exploration of high thermal conductivity polymer composite materials with conductive filler particles for use in heat transfer applications. However, poor particle dispersibility and interfacial phonon scattering have limited the effective composite thermal conductivity. Three-dimensional foams with high ligament thermal conductivity offer a potential solution to the two aforementioned problems but are traditionally fabricated through expensive and/or complex manufacturing methods. Here, laser induced graphene foams, fabricated through a simple and cost effective laser ablation method, are infiltrated with poly(3-hexylthiophene) in a step-wise fashion to demonstrate the impact of polymer on the thermal conductivity of the composite system. Surprisingly, the addition of polymer results in a drastic (250%) improvement in material thermal conductivity, enhancing the graphene foam's thermal conductivity from 0.68 W/m-K to 1.72 W/m-K for the fully infiltrated composite material. Graphene foam density measurements and theoretical models are utilized to estimate the effective ribbon thermal conductivity as a function of polymer filling. Here, it is proposed that the polymer solution acts as a binding material, which draws graphene ligaments together through elastocapillary coalescence and bonds these ligaments upon drying, resulting in greatly reduced contact resistance within the foam and an effective thermal conductivity improvement greater than what would be expected from the addition of polymer alone.en_US
dc.identifier.citationSmith, M.K., Luong, D.X., Bougher, T.L., et al.. "Thermal conductivity enhancement of laser induced graphene foam upon P3HT infiltration." <i>Applied Physics Letters,</i> 109, no. 25 (2016) AIP Publishing: http://dx.doi.org/10.1063/1.4972790.
dc.identifier.doihttp://dx.doi.org/10.1063/1.4972790en_US
dc.identifier.urihttps://hdl.handle.net/1911/94320
dc.language.isoengen_US
dc.publisherAIP Publishing
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleThermal conductivity enhancement of laser induced graphene foam upon P3HT infiltrationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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