Three-in-One Coupled Shape Memory, Self-healing, and Photochromic System in Dynamic Covalent Polyurethane Network for Sequential 4D Encryption

Yi-Xin Ji; Ahmed Olalekan Omoniyi; Yang Zhou; Ying-Chao Zhang; Jian-Fu Zhang

doi:10.1007/s10118-026-3722-6

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Three-in-One Coupled Shape Memory, Self-healing, and Photochromic System in Dynamic Covalent Polyurethane Network for Sequential 4D Encryption

RESEARCH ARTICLE | Updated：2026-07-20

- Three-in-One Coupled Shape Memory, Self-healing, and Photochromic System in Dynamic Covalent Polyurethane Network for Sequential 4D Encryption
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-13(2026)
- Affiliations：
  
  a.Jilin Provincial Science and Technology Innovation Centre of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
  b.Zhongshan Institute of Changchun University of Science and Technology, Zhongshan 528437, China
  c.School of Opto-electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
  d.Shandong Province Engineering Research Center for Future Industries of Key Materials in Optoelectronics, Weifang University of Science and Technology, Shouguang 262700, China
- Author bio：
  
  zhouyang@cust.edu.cn (Y.Z.)
  zhangyingchao@wfust.edu.cn (Y.C.Z.)
  zhangjianfu@cust.edu.cn (J.F.Z.)
- Funds：
- DOI：10.1007/s10118-026-3722-6
  CLC：
- Received：13 February 2026，
  
  Revised：2026-04-04，
  
  Accepted：20 April 2026，
  
  Online First：20 July 2026，
  
  Published：2026-06
- Accepted：
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Ji, Y. X.; Omoniyi, A. O.; Zhou, Y.; Zhang, Y. C.; Zhang, J. F. Three-in-one coupled shape memory, self-healing, and photochromic system in dynamic covalent polyurethane network for sequential 4D encryption. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3722-6

Yi-Xin Ji, Ahmed Olalekan Omoniyi, Yang Zhou, et al. Three-in-One Coupled Shape Memory, Self-healing, and Photochromic System in Dynamic Covalent Polyurethane Network for Sequential 4D Encryption[J/OL]. Chinese Journal of Polymer Science, 2026, 441-13.
Ji, Y. X.; Omoniyi, A. O.; Zhou, Y.; Zhang, Y. C.; Zhang, J. F. Three-in-one coupled shape memory, self-healing, and photochromic system in dynamic covalent polyurethane network for sequential 4D encryption. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3722-6 DOI：

Yi-Xin Ji, Ahmed Olalekan Omoniyi, Yang Zhou, et al. Three-in-One Coupled Shape Memory, Self-healing, and Photochromic System in Dynamic Covalent Polyurethane Network for Sequential 4D Encryption[J/OL]. Chinese Journal of Polymer Science, 2026, 441-13. DOI： 10.1007/s10118-026-3722-6.

摘要

Abstract

Information leakage and forgery continue to threaten the security of the information storage and transmission. However

most existing physical encryption materials rely on single and predictable stimulus-response mechanisms

resulting in limited security

programmability

and service life. Herein

a high-security sequential 4D encryption system is developed based on a dynamic covalent polyurethane network that integrates shape memory

self-healing

and photochromism in one system. Arylboronic acid was incorporated into the polyurethane framework to form a dynamic boron carbamate network. The resulting boroxine crosslinks act as reversible junctions

enabling thermally triggered shape memory behavior

while simultaneously providing efficient self-healing through reversible hydrolysis and reformation. The optimized polyurethane exhibited a tensile strength of about 35 MPa

a shape-fixity ratio of >99%

and a shape-recovery ratio of up to 83% while achieving a self-healing efficiency of about 81% after thermal treatment. In parallel

the incorporation of a photochromic dye enables precise time-dependent color evolution under ultraviolet irradiation. The synergistic coupling of thermal and photonic responses allows sequential and time-gated information decoding

significantly increasing the encryption complexity and resistance to unauthorized access. The resulting films function as dynamic 4D encryption carriers from which correct information can be retrieved only through a predefined sequence of shape recovery and color transformation. This study provides a versatile strategy for next-generation physical encryption materials with intrinsic damage tolerance

long-term reliability

and storage potential in optical data storage and advanced anti-counterfeiting applications.

关键词

Keywords

references

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