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Cellulose nanofibers enable paraffin encapsulation and the formation of stable thermal regulation nanocomposites
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-1591-5815
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-9663-7705
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0003-1161-9311
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2017 (English)In: Nano Energy, ISSN 2211-2855, Vol. 34, 541-548 p.Article in journal (Refereed) Published
Abstract [en]

Non-leaking, green materials with high content of phase change materials (PCM) can conserve solar energy and contribute to a sustainable society. Here, paraffin was encapsulated by nanocellulose (CNF) through a pickering emulsion method, while simultaneously forming a composite material. The thermodynamic drive for phase separation was confirmed by molecular modeling. Particle formation was characterized by dynamic light scattering and they were processed into stable PCM/CNF composites in the form of PCM paper structures with favorable mechanical properties. The PCM composite was lightweight and showed a solid content of paraffin of more than 72 wt%. Morphology was characterized using FE-SEM. The thermal regulation function of the PCM composite was demonstrated in the form of a model roof under simulated sunlight. No obvious leakage was observed during heating/cooling cycles, as supported by DSC and SAXS data. The PCM composite can be extended to panels used in energy-efficient smart buildings with thermal regulation integrated in load-bearing structures.

Place, publisher, year, edition, pages
2017. Vol. 34, 541-548 p.
Keyword [en]
Nanocellulose, Phase change materials, Encapsulation, Thermal regulation, Biocomposites
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-204014DOI: 10.1016/j.nanoen.2017.03.010ISI: 000400383300057Scopus ID: 2-s2.0-85015399594OAI: oai:DiVA.org:kth-204014DiVA: diva2:1083780
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20170411

Available from: 2017-03-22 Created: 2017-03-22 Last updated: 2017-05-23Bibliographically approved

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