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parvate-et-al-2024-lego-microfluidics-generated-magnetically-responsive-bifunctional-microcapsules-with-encapsulated.pdf (7.69 MB)

Lego-microfluidics generated magnetically responsive bifunctional microcapsules with encapsulated phase change material

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posted on 2024-04-18, 11:04 authored by Sumit ParvateSumit Parvate, Seyedarash MoshtaghibanaSeyedarash Moshtaghibana, Madhav Solanke, Nibina NizarNibina Nizar, Nico Leister, Philipp Schochat, Kelly MorrisonKelly Morrison, Sujay Chattopadhyay, Goran VladisavljevicGoran Vladisavljevic

We report an innovative Lego-microfluidic technology for room temperature synthesis of highly monodispersed bifunctional microcapsules enclosing phase change material (PCM), exhibiting magnetic and thermal energy storage properties. Iron (II, III) oxide (Fe3O4) nanoparticle-embedded microcapsules encapsulating hexadecane (HD) are synthesized without external heating or cooling in just ~80 s. The process involves forming oil-in-oil-in-water (O/O/W) double emulsion droplets with Norland Optical Adhesive (NOA) photopolymeric shell and consolidating them through on-the-fly shell polymerization using thiol-ene “click” chemistry. PCM content and magnetic properties were accurately manipulated by adjusting inner phase (PCM) flowrate and mass fraction of Fe3O4 nanoparticles in the middle (polymer) phase. Microcapsules with a shell thickness of 17.1 μm achieved a maximum PCM content of 63.3%. Thermogravimetric analysis (TGA) revealed significantly enhanced thermal stability of Fe3O4 nanoparticle-embedded microcapsules compared to pure PCM. Vibrating sample magnetometry (VSM) verified an increase in saturation magnetization and residual magnetization of microcapsules having higher Fe3O4 nanoparticle content. Notably, the sample containing 1% Fe3O4 nanoparticles exhibited excellent magnetic properties, showcasing a saturation magnetization of 0.194 emu/g. Concurrently, the PCM microcapsules demonstrated high magnetic responsiveness and maneuverability.

Funding

Commonwealth Scholarship Commission, UK

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Science

Department

  • Chemical Engineering
  • Physics

Published in

ACS Sustainable Chemistry and Engineering

Publisher

American Chemical Society

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by American Chemical Society under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

2024-03-26

Publication date

2024-04-08

Copyright date

2024

ISSN

2168-0485

eISSN

2168-0485

Language

  • en

Depositor

Dr Goran Vladisavljevic. Deposit date: 26 March 2024

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