Polydimethylsiloxane-Based Self-Healing Materials

Authors

  • S. H. Cho,

    1. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    2. Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • H. M. Andersson,

    1. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    2. Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • S. R. White,

    1. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    2. Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • N. R. Sottos,

    1. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    2. Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • P. V. Braun

    1. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    2. Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • This work has been sponsored by the Grainger Emerging Technology Program, Northrop Grumman Ship Systems (SRA 04-307), and by the Beckman Institute for Advanced Science and Technology at the University of Illinois at Urbana-Champaign. The authors gratefully acknowledge helpful discussions with Prof. J. Moore, Dr. J. Rule, J. Kamphaus, and Dr. A. Jones.

Abstract

original image

Polydimethylsiloxane-based self-healing is achieved through the tin-catalyzed polycondensation of phase-separated droplets. The catalyst is released into the crack plane when microcapsules containing a tin compound are ruptured by the advancing crack (see figure). This system greatly extends the capability of self-healing polymers by introducing a new, stable healing chemistry into a structural polymer matrix and may provide a route to self-healing in harsh and corrosive environments.

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