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
- Recyclable and Self-healable Polydimethylsiloxane Elastomers Based on Knoevenagel Condensation
- 高分子科学（英文） 2025年43卷第1期页码：53-60
- 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：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51973025 and 52222307), Jilin Science and Technology Bureau (Nos. 20220204107YY and 20230204086YY), Changchun Science and Technology Bureau (No. 21ZGY06) and Jilin Province Development and Reform Commission (No. 2023C028-4).;Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-024-3248-8.
- DOI：10.1007/s10118-024-3248-8
  中图分类号：
- 纸质出版日期：2025-01-01，
  
  网络出版日期：2024-11-25，
  
  收稿日期：2024-08-19，
  
  修回日期：2024-10-15，
  
  录用日期：2024-10-17
- 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

Dynamic covalent chemistryElastomerKnoevenagel condensation reactionPolydimethylsiloxaneRecyclableSelf-healing

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