Research progress in bio⁃based vitrimer materials

doi:10.19491/j.issn.1001-9278.2022.10.020

Abstract

Abstract:

Vitrimer is a type of polymer that combines the advantages of traditional thermosetting and thermoplastic polymers and is capable of network reorganization under the stimulation of external conditions to maintain good mechanical properties and allow repeatable molding processes. This has generated a great impact to the fields of self⁃healing of materials and corresponding design of shape⁃memory smart polymers. This paper introduced the history of vitrimer materials and the topological freezing transition temperature. The paper also gave an overview of the study on the dynamic mechanism of vitrimer based on the ester exchange， alkyl transfer， and transamination. In addition， the bio⁃based vitrimers based on lignin， vegetable oil， cellulose， and Vanillin were discussed in detail， and an outlook on vitrimer as a class of materials were prospected.

Key words: dynamic covalent bond, biopolymer, vitrimer

CLC Number:

TQ 321

ZHANG Jiale, BO Caiying, BEI Yu, SHA Ye, JIA Puyou, ZHOU Yonghong. Research progress in bio⁃based vitrimer materials[J]. China Plastics, 2022, 36(10): 138-148.

Figures/Tables 13

Fig.1. Scheme of two covalent adaptable networks［15］

Fig.2. Plot of ln η versus temperature for amorphous vitrimer and semicrystalline vitrimer［23］

Fig.3. Chemical structure and transesterification of epoxy vitrimer

Fig.4. Transesterification of oxime⁃ester bonds

Fig.5. Synthesis of vinylogous urethane and exchange of vinylogous urethanes and amines

Fig.6. C⁃N alkyl and alkyl transfer of sulfur salts and vitrimer material design

Fig.7. Preparation of conductive ion networks

Fig.8. Chemical modification of Kraft lignin with the introduction of COOH groups

Fig.9. Synthesis process of polyurea binders containing lignin

Fig.10. Preparation of the Se⁃EP/Oz⁃L vitrimer and its reconstruction through TERs

Fig.11. Scheme of the chemical structures of ESO and GL， solidification reactions and topological rearrangement of the ESO/GL network

Fig.12. Scheme of the fabrication of paper⁃reinforced polycarbonate vitrimer［55］

Fig.13. Preparation route of CNF/vitrimer nanocomposites by aqueous mixing of PDMS⁃based low Tg vitrimer nanoparticles （VP） with CNF［56］

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