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Title: Deformation Rate‐Adaptive Conducting Polymers and Composites

Journal Article · · Small
 [1];  [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [1];  [1];  [1];  [1];  [3]; ORCiD logo [4];  [2]; ORCiD logo [5]
  1. Department of Materials Science and Engineering University of California, Merced Merced CA 95343 USA
  2. Sibley School of Mechanical and Aerospace Engineering Cornell University Ithaca NY 14850 USA
  3. Department of Chemistry and Biochemistry University of California, Merced Merced CA 95343 USA
  4. Lawrence Berkeley National Lab Berkeley CA 94720 USA
  5. Department of Materials Science and Engineering University of California, Merced Merced CA 95343 USA, Department of Chemistry and Biochemistry University of California, Merced Merced CA 95343 USA

Abstract Materials are more easily damaged during accidents that involve rapid deformation. Here, a design strategy is described for electronic materials comprised of conducting polymers that defies this orthodox property, making their extensibility and toughness dynamically adaptive to deformation rates. This counterintuitive property is achieved through a morphology of interconnected nanoscopic core–shell micelles, where the chemical interactions are stronger within the shells than the cores. As a result, the interlinked shells retain material integrity under strain, while the rate of dissociation of the cores controls the extent of micelle elongation, which is a process that adapts to deformation rates. A prototype based on polyaniline shows a 7.5‐fold increase in ultimate elongation and a 163‐fold increase in toughness when deformed at increasing rates from 2.5 to 10 000% min −1 . This concept can be generalized to other conducting polymers and highly conductive composites to create “self‐protective” soft electronic materials with enhanced durability under dynamic movement or deformation.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐05CH11231
OSTI ID:
1971541
Journal Information:
Small, Journal Name: Small Vol. 19 Journal Issue: 35; ISSN 1613-6810
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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