Elastomers for stretchable electronics : from molecular structure to mechanical properties
Abstract/Contents
- Abstract
- Elastomers that can sustain large reversible strain are essential components for stretchable electronics. In order to improve the stretchability and mechanical robustness of the elastomers without interfering with their electronic performance, one approach is to apply a multi-network structure that drives covalent cross-links easy to break, and another approach is to use dynamic (supramolecular) cross-links that can easily break and re-form. Using these approaches, the elastomers exhibit stress-strain hysteresis indicating strain-induced damage by bond breaking. On the other hand, the bond re-forming events can repair the damage and enable the self-healing of elastomers. Although modern chemical tools are available for controlling the bond property of cross-links, fundamental understanding of the underlying mechanisms is lacking due to the gap in knowledge about how the bond-dynamics governing microstructure relates to the emerging mechanical and self-healing properties. Using coarse-grained molecular dynamics (CGMD), network analysis and analytic modeling, the author of this thesis establishes an explicit microstructure-property relationship for multi-network elastomers and supramolecular elastomers in the form of shortest paths connecting distant cross-links. The average length and straightness of these shortest paths serve as key damage parameters that feature hysteresis, directionality, self-healing and control of the stress-strain responses. These findings serve as a basis for understanding the existing elastomers and a guide for the design of new ones
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Yin, Yikai |
|---|---|
| Degree supervisor | Cai, Wei, 1977- |
| Thesis advisor | Cai, Wei, 1977- |
| Thesis advisor | Dauskardt, R. H. (Reinhold H.) |
| Thesis advisor | Bao, Zhenan |
| Degree committee member | Dauskardt, R. H. (Reinhold H.) |
| Degree committee member | Bao, Zhenan |
| Associated with | Stanford University, Department of Materials Science and Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Yikai Yin |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering |
| Thesis | Thesis Ph.D. Stanford University 2020 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by Yikai Yin
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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