Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Dihydrazone-based Dynamic Covalent Epoxy Networks with High Creep Resistance, Controlled Degradability, and Intrinsic Antibacteria from Bioresources

Abstract

Covalent adaptable networks (CANs) provide a promising approach to the recycle issue of thermosets due to their dynamic cross-linked networks. However, CANs are susceptible to creep at relatively low temperatures, and their chemical stability is also inevitably doubted. Here, we designed novel dihydrazone CANs from cross-linking of a dihydrazone-containing epoxy monomer which was synthesized from the condensation of lignin derivative vanillin and hydrazinium hydrate, followed by reacting with epichlorohydrin. Beside the excellent malleability and reprocessability, the dihydrazone CANs exhibited high initial creep temperature of ~105 °C, which was ascribed to the superior stability of hydrazone bond at around 100 °C and favorable hydrazone exchangeability at elevated temperatures. Meanwhile, the degradation of the dihydrazone CANs exhibited temperature, solvent and acidity dependence. Moreover, on account of the high antibacterial property of hydrazone bond, the CANs presented high killing rate (95.8%) to Gram-negative bacteria (E. coli). Thus, this work disclosed an effective dynamic covalent motif for the development of CANs with excellent dimensional stability, chemical resistance and intrinsic antibacteria.

Back to tab navigation

Supplementary files

Article information


Submitted
06 Feb 2020
Accepted
08 May 2020
First published
08 May 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

Dihydrazone-based Dynamic Covalent Epoxy Networks with High Creep Resistance, Controlled Degradability, and Intrinsic Antibacteria from Bioresources

X. Xu, S. Ma, S. Wang, J. Wu, Q. Li, N. lu, Y. liu, J. Yang, J. Feng and J. Zhu, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/D0TA01419B

Social activity

Search articles by author

Spotlight

Advertisements