Cellulose nanofibers enable paraffin encapsulation and the formation of stable thermal regulation nanocomposites
2017 (English)In: Nano Energy, ISSN 2211-2855, Vol. 34, 541-548 p.Article in journal (Refereed) Published
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.
Nanocellulose, Phase change materials, Encapsulation, Thermal regulation, Biocomposites
IdentifiersURN: urn:nbn:se:kth:diva-204014DOI: 10.1016/j.nanoen.2017.03.010ScopusID: 2-s2.0-85015399594OAI: oai:DiVA.org:kth-204014DiVA: diva2:1083780
FunderKnut and Alice Wallenberg Foundation
QC 201704112017-03-222017-03-222017-04-11Bibliographically approved