Fully bio-originated latent heat storing calcium alginate microcapsules with high coconut oil loading

Bence Németh, Ágnes S. Németh, Aurél Ujhidy, J. Tóth, László Trif, János Gyenis, Tivadar Feczkó

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Latent heat storing calcium alginate microcapsules were manufactured by a repeated interfacial coacervation/crosslinking method. By using a high-viscosity sodium alginate for the capsule formation, the paraffin phase change material (PCM) content was substantially enhanced related to the recently developed procedure. The maximization of PCM loading was achieved using experimental design for paraffin containing microcapsules. The microcomposites were optimized for 81.5% PCM content with uniform size of 2.20 ± 0.14 mm. In some applications e.g. packaging, the biodegradable character of the materials is especially beneficial, hence for the manufacture of entirely eco-friendly heat storing microcomposites coconut oil PCM was microencapsulated by the same procedure. The process originally developed and optimized for paraffin was scaled-up by two orders of magnitude, accordingly, the outstanding PCM content was reproduced also with coconut oil (average value 81.1%). The high PCM content was reflected also in the heat storing capacity measured by differential scanning calorimetry. The easily upscalable, spherical and core/shell structured, entirely biocompatible microcapsules with thermally stable calcium alginate coating could be developed for industrial application.

Original languageEnglish
Pages (from-to)314-322
Number of pages9
JournalSolar Energy
Volume170
DOIs
Publication statusPublished - Aug 1 2018

Fingerprint

Phase change materials
Latent heat
Alginate
Capsules
Calcium
Paraffin
Paraffins
Sodium alginate
Crosslinking
Design of experiments
Industrial applications
Specific heat
Oils
alginic acid
coconut oil
Differential scanning calorimetry
Packaging
Viscosity
Coatings

Keywords

  • Biocompatible microcapsules
  • Calcium alginate
  • Coconut oil
  • Phase change materials

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Fully bio-originated latent heat storing calcium alginate microcapsules with high coconut oil loading. / Németh, Bence; Németh, Ágnes S.; Ujhidy, Aurél; Tóth, J.; Trif, László; Gyenis, János; Feczkó, Tivadar.

In: Solar Energy, Vol. 170, 01.08.2018, p. 314-322.

Research output: Contribution to journalArticle

Németh, Bence ; Németh, Ágnes S. ; Ujhidy, Aurél ; Tóth, J. ; Trif, László ; Gyenis, János ; Feczkó, Tivadar. / Fully bio-originated latent heat storing calcium alginate microcapsules with high coconut oil loading. In: Solar Energy. 2018 ; Vol. 170. pp. 314-322.
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