Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 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 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20731]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 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. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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