Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds

Yuepeng Wang; Lei Yang; Luzhi Zhang; Hongfei Huang; Bo Qian; Shijia Gu; Zhengwei You

doi:10.1007/s10118-023-3009-0

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Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds

RESEARCH ARTICLE | Updated：2023-11-10

- Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds
- Chinese Journal of Polymer Science Vol. 41, Issue 11, Pages: 1725-1732(2023)
- Affiliations：
  
  State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
- Author bio：
  
  zyou@dhu.edu.cn
- Funds：
- DOI：10.1007/s10118-023-3009-0
  CLC：
- Received：08 March 2023，
  
  Revised：2023-4-26，
  
  Accepted：30 May 2023，
  
  Online First：10 July 2023，
  
  Published：01 November 2023
- Accepted：
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Wang, Y.; Yang, L.; Zhang, L.; Huang, H.; Qian, B.; Gu, S.; You, Z. Solvent-free synthesis of self-healable and recyclable crosslinked polyurethane based on dynamic oxime-urethane bonds. Chinese J. Polym. Sci. 2023, 41, 1725–1732

Yuepeng Wang, Lei Yang, Luzhi Zhang, et al. Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds[J]. Chinese Journal of Polymer Science, 2023, 41(11): 1725-1732.
Wang, Y.; Yang, L.; Zhang, L.; Huang, H.; Qian, B.; Gu, S.; You, Z. Solvent-free synthesis of self-healable and recyclable crosslinked polyurethane based on dynamic oxime-urethane bonds. Chinese J. Polym. Sci. 2023, 41, 1725–1732 DOI： 10.1007/s10118-023-3009-0.

Yuepeng Wang, Lei Yang, Luzhi Zhang, et al. Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds[J]. Chinese Journal of Polymer Science, 2023, 41(11): 1725-1732. DOI： 10.1007/s10118-023-3009-0.

摘要

We first utilized the solubility of dimethylglyoxime in polyethylene glycol to prepare a recyclable and self-healing crosslinked polyurethane through bulk polymerization. By introducing metal coordination

we can enhance its strength and promote dynamic reversibility. The key to these improvements lies in the coordination and catalytic effect of copper ions.

Abstract

Polyurethane is widely used for its versatility in design and range of performance. Self-healing and recyclable dynamic polyurethane networks have attracted extensive attention due to their potential to extend service life and ensure safety in use

as well as to promote sustainable use of resources. Developing green and environment-friendly methods to obtain this material is an interesting and challenging task

as the majority of current dynamic polyurethane networks utilize the solution polymerization method. The use of solvents makes the processes complicated

harmful to environment

and increase the cost. Poly(oxime-urethanes) (POUs) are emerging dynamic polyurethanes and show great potential in diverse fields

such as biomaterials

hot melt adhesives

and flexible electronics. In this study

we utilized the solubility properties of dimethylglyoxime in raw material poly(ethylene glycol) to prepare POUs through bulk polymerization for the first time. This method is simple

convenient and cost-efficient. Simultaneously

copper ion coordination improves POUs strength and dynamic properties

with mechanical strength up from 0.54 MPa to 1.03 MPa and self-healing recovery rate up from 85.5% to 91.8%

and activation energy down from 119.6 kJ/mol to 95.4 kJ/mol. To demonstrate the application of this technology

self-healing and stretchable circuits are constructed from this dynamic polyurethane network.

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