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Paving the Thermal Highway with Self-Organized Nanocrystals in Transparent Polymer Composites
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.
Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron.
Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron.
Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron.
Vise andre og tillknytning
Rekke forfattare: 62016 (engelsk)Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, nr 42, s. 29080-29087Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Phonon transfer is greatly scattered in traditional polymer composites due to the unpaired phonon frequency at the polymer/filler interface. A key innovation of this work is to build continuous crystal network by self-organization and utilize it as “thermal highway” that circumvents the long-existing interfacial thermal barrier issue in traditional composites. By tuning the molecular diffusion rate of dicarboxylic acids (oxalic acid, malonic acid, and succinic acid), different crystal structures including skeletal, dendrite, diffusion-limited aggregates, and spherulite were synthesized in PVA film. These continuous crystal structures benefit the efficient phonon transfer in the composites with minimized interfacial scattering and lead to a significant thermal conductivity enhancement of up to 180% compared to that of pure polymer. Moreover, the transparent feature of these composite films provides additional benefits in display applications. The post heat treatment effect on the thermal conductivity of the composite films shows a time-dependent behavior. These uniquely structured polymer/crystal composites are expected to generate significant impacts in thermal management applications.

sted, utgiver, år, opplag, sider
2016. Vol. 8, nr 42, s. 29080-29087
Emneord [en]
crystal network, phonon, polymer composites, thermal conductivity, transparent
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Identifikatorer
URN: urn:nbn:se:ltu:diva-60506DOI: 10.1021/acsami.6b10451ISI: 000386540300091Scopus ID: 2-s2.0-84993982660OAI: oai:DiVA.org:ltu-60506DiVA, id: diva2:1047325
Merknad

Validerad; 2016; Nivå 2; 2016-11-17 (andbra)

Tilgjengelig fra: 2016-11-17 Laget: 2016-11-17 Sist oppdatert: 2019-02-22bibliografisk kontrollert

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