Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources

doi:10.1039/d0ta01419b

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources
	Xu, Xiwei; Ma, Songqi; Wang, Sheng; Wu, Jiahui; Li, Qiong; Lu, Na; Liu, Yanlin; Yang, Jintao; Feng, Jie; Zhu, Jin
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2020
卷号	8 期号:22 页码:11261-11274
关键词	HIGH-PERFORMANCE POLYMER NETWORKS THERMOSETS VITRIMERS TRANSALKYLATION LINKAGES BONDS BLOCK
DOI	10.1039/d0ta01419b
英文摘要	Covalent adaptable networks (CANs) provide a promising approach to solve the issue of recycling 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 doubtful. Here, we designed novel dihydrazone CANs by cross-linking a dihydrazone-containing epoxy monomer, which was synthesized from the condensation of a lignin derivative vanillin and hydrazinium hydrate, followed by a reaction with epichlorohydrin. Besides the excellent malleability and reprocessability, the dihydrazone CANs exhibited a high initial creep temperature of similar to 105 degrees C, which was ascribed to the superior stability of the hydrazone bond at around 100 degrees 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 properties of the hydrazone bond, the CANs presented a high killing rate (95.8%) for Gram-negative bacteria (E. coli). Thus, this work discloses an effective dynamic covalent motif for the development of CANs with excellent dimensional stability, chemical resistance, and intrinsic antibacterial properties.
学科主题	Chemistry ; Energy & Fuels ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20731]
专题	2020专题
作者单位	Ma, SQ (corresponding author), Chinese Acad Sci, Key Lab Biobased Polymer Mat Technol & Applicat Z, Lab Polymers & Composites, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Xiwei,Ma, Songqi,Wang, Sheng,et al. Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8(22):11261-11274.
APA	Xu, Xiwei.,Ma, Songqi.,Wang, Sheng.,Wu, Jiahui.,Li, Qiong.,...&Zhu, Jin.(2020).Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources.JOURNAL OF MATERIALS CHEMISTRY A,8(22),11261-11274.
MLA	Xu, Xiwei,et al."Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources".JOURNAL OF MATERIALS CHEMISTRY A 8.22(2020):11261-11274.