Mechanical Restoration of Damaged Polymer Films by "repair-and-Go"

Ying Bai, Chia Chih Chang, Xiaojuan Zhao, Alexander Ribbe, Irem Bolukbasi, Megan J. Szyndler, Alfred J. Crosby, Todd Emrick*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A microencapsulation and nanoparticle deposition technique, termed "repair-and-go," is employed for inducing mechanical restoration of damaged polymer films. In "repair-and-go," polymer-stabilized emulsion droplets, containing surface-functionalized SiO2 nanoparticles, traverse a substrate and deposit their nanoparticle contents selectively into the damaged regions. Surface-oxidized poly(dimethylsiloxane) is employed as the substrate, and dynamic mechanical analysis reveals the enhanced mechanical properties of the film following nanoparticle deposition. Healing efficiency is optimal when using thinner test substrates, repeated deposition cycles, and functional SiO2 nanoparticles that afford access to postdeposition curing. Microencapsulation and nanoparticle deposition are combined in a materials healing technique termed "repair-and-go". It has been shown that polymer-stabilized oil droplets can traverse a substrate and deposit nanoparticles into the damaged regions of a polymer film. Dynamic mechanical analysis demonstrated effective restoration of mechanical properties through assessment of film stiffness.

Original languageEnglish
Pages (from-to)857-863
Number of pages7
JournalAdvanced Functional Materials
Volume26
Issue number6
DOIs
StatePublished - 9 Feb 2016

Keywords

  • cracks
  • healing efficiency
  • microencapsulation
  • nanoparticle deposition
  • repair-and-go

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