The potential of magnetic heating for fabricating Pickering-emulsion-based capsules

Rafał Bielas, Dawid Surdeko, Katarzyna Kaczmarek, Arkadiusz Józefczak

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
1 Downloads (Pure)

Abstract

Pickering emulsions (particle-stabilized emulsions) have been widely explored due to their potential applications, one of which is using them as precursors for the formation of colloidal capsules that could be utilized in, among others, the pharmacy and food industries. Here, we present a novel approach to fabricating such colloidal capsules by using heating in the alternating magnetic field. When exposed to the alternating magnetic field, magnetic particles, owing to the hysteresis and/or relaxation losses, become sources of nano- and micro-heating that can significantly increase the temperature of the colloidal system. This temperature rise was evaluated in oil-in-oil Pickering emulsions stabilized by both magnetite and polystyrene particles. When a sample reached high enough temperature, particle fusion caused by glass transition of polystyrene was observed on surfaces of colloidal droplets. Oil droplets covered with shells of fused polystyrene particles were proved to be less susceptible to external stress, which can be evidence of the successful formation of capsules from Pickering emulsion droplets as templates.
Original languageEnglish
Article number111070
Pages (from-to)1-9
Number of pages9
JournalColloids and Surfaces B: Biointerfaces
Volume192
Early online date22 Apr 2020
DOIs
Publication statusPublished - 1 Aug 2020

Keywords

  • magnetic heating
  • pickering emulsions
  • colloidal capsules
  • specific absorption rate
  • magnetic particles
  • alternating magnetic field

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