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Electrosprayed Multi-Core Alginate Microcapsules as Novel Self-Healing Containers.

Iee Lee Hia1, Pooria Pasbakhsh1, Eng-Seng Chan2

  • 1Advanced Engineering Platform, Mechanical Engineering Discipline, School of Engineering, Monash University Malaysia, 47500, Bandar Sunway, Selangor, Malaysia.

Scientific Reports
|October 4, 2016
PubMed
Summary

This study introduces a sustainable, formaldehyde-free self-healing composite using alginate microcapsules filled with epoxy resin. The developed system demonstrates high healing efficiency and multiple healing capabilities, offering a cost-effective solution for material repair.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Developing self-healing materials is crucial for extending the lifespan of structural composites.
  • Traditional self-healing systems often involve toxic components or limited healing cycles.

Purpose of the Study:

  • To create a cost-effective, environmentally benign, and sustainable self-healing composite system.
  • To encapsulate epoxy resin within alginate microcapsules for effective crack repair.

Main Methods:

  • Electrospraying was used to fabricate alginate microcapsules containing epoxy resin.
  • Characterization involved microscopy (light, FESEM), FTIR, and TGA.
  • In situ healing tests were performed on impact and Three-Point Bend (TPB) specimens.

Main Results:

  • Porous, multi-core alginate/epoxy microcapsules (320 ± 20 μm) with 79% loading capacity were successfully produced.
  • Impact specimens exhibited up to 86% healing efficiency and could heal up to three times.
  • TPB specimens showed a one-time healing efficiency of 76%.

Conclusions:

  • The developed capsule-based system offers multiple healing capabilities and high performance.
  • This formaldehyde-free, sustainable approach provides a promising solution for self-healing composites.