Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation

Yao-Wei Zhu; Tong-Tong Man; Ming-Ming Zhao; Jia-Yi Chen; Yu Yan; Xiao-Nong Zhang; Li Chen; Chun-Sheng Xiao

doi:10.1007/s10118-024-3248-8

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Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation

RESEARCH ARTICLE | Updated：2024-12-31

- Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation
- Chinese Journal of Polymer Science Vol. 43, Issue 1, Pages: 53-60(2025)
- Affiliations：
  
  a.Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.Department of Chemistry, Northeast Normal University, Changchun 130024, China
- Author bio：
  
  zhangxn@ciac.ac.cn (X.N.Z.)
  chenl686@nenu.edu.cn (L.C.)
  xiaocs@ciac.ac.cn (C.S.X.)
- Funds：
- DOI：10.1007/s10118-024-3248-8
  CLC：
- Received：19 August 2024，
  
  Revised：2024-10-15，
  
  Accepted：17 October 2024，
  
  Online First：25 November 2024，
  
  Published：01 January 2025
- Accepted：
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Zhu, Y. W.; Man, T. T.; Zhao, M. M.; Chen, J. Y.; Yan, Y.; Zhang, X. N.; Chen, L.; Xiao, C. S. Recyclable and self-healable polydimethylsiloxane elastomers based on knoevenagel condensation. Chinese J. Polym. Sci. 2025, 43, 53–60

Yao-Wei Zhu, Tong-Tong Man, Ming-Ming Zhao, et al. Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation[J]. Chinese Journal of Polymer Science, 2025, 43(1): 53-60.
Zhu, Y. W.; Man, T. T.; Zhao, M. M.; Chen, J. Y.; Yan, Y.; Zhang, X. N.; Chen, L.; Xiao, C. S. Recyclable and self-healable polydimethylsiloxane elastomers based on knoevenagel condensation. Chinese J. Polym. Sci. 2025, 43, 53–60 DOI： 10.1007/s10118-024-3248-8.

Yao-Wei Zhu, Tong-Tong Man, Ming-Ming Zhao, et al. Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation[J]. Chinese Journal of Polymer Science, 2025, 43(1): 53-60. DOI： 10.1007/s10118-024-3248-8.

摘要

In this study

a crosslinked polydimethylsiloxane (PDMS) elastomer was successfully synthesized via a dynamic Knoevenagel condensation reaction. The obtained material exhibits good self-healing

reprocessability

chemical recyclability

and adhesion performance.

Abstract

Elastomers are widely used in various fields owing to their excellent tensile properties. Recyclable and self-healing properties are key to extending the service life of elastomers. Accumulating evidence indicates that dynamic covalent chemistry has emerged as a powerful tool for constructing recyclable and self-healing materials. In this work

we demonstrate the preparation of a recyclable and self-healable polydimethylsiloxane (PDMS) elastomer based on the Knoevenagel condensation (KC) reaction. This PDMS elastomer was prepared by the KC reaction catalyzed by 4-dimethylaminopyridine (DMAP). The obtained PDMS elastomer exhibited an elongation at break of 266%

a tensile strength of 0.57 MPa

and a good thermal stability (

=357 °C). In addition

because of the presence of dynamic C＝C bonds formed by the KC reaction and low glass transition temperature (

=−117 °C). This PDMS exhibited good self-healing and recycling properties at room temperatur

e and could be reprocessed by hot pressing. In addition

the PDMS elastomer exhibits good application prospects in the fields of adhesives and flexible electronic devices.

关键词

Keywords

references

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