文献类型：期刊文献

英文题名：Bio-based adaptable dynamically cross-linked networks and their composites: multiple stimulus responses and potential electromagnetic shielding applications

作者：Hu, Yun[1] Sha, Ye[2] Chen, Lei[3] Ma, Yufeng[3] Huang, Qin[4] Zhang, Meng[1] Jia, Puyou[1] Zhou, Yonghong[1]

第一作者：胡云

机构：[1] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry [CAF], Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, 16 Suojin North Road, Jiangsu Province, Nanjing, 210042, China; [2] College of Science, Nanjing Forestry University, Nanjing, 210037, China; [3] College of Materials Science and Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China; [4] Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning, 530006, China

年份：2024

卷号：13

期号：6

起止页码：4317-4328

外文期刊名：Journal of Materials Chemistry A

收录：EI(收录号：20250317695220)

语种：英文

外文关键词：Catalytic cracking - Crosslinking - Directed graphs - Electromagnetic shielding - Electromagnetic wave emission - Energy efficiency - Multiwalled carbon nanotubes (MWCN) - Plastic recycling - Self-healing materials - Thermosets - Trees (mathematics)

摘要：Dynamically cross-linked networks combine the characteristics of thermoplastics and thermosets, enabling reprocessability while maintaining covalent cross-linking. However, they still face multiple challenges in practical applications. Here, we present a strategy for the development of tung oil-based dynamically cross-linked networks (PNMETs) through the introduction of a primary amine to disrupt the physical cross-linking and chain entanglements. This approach allows for the achievement of tunable mechanical strength and toughness, self-healing, solid-state plasticity, and topological transformation. The resulting PNMETs demonstrate multiple stimulus responses to light, heat, microwaves, and infrared radiation and exhibit excellent recycling and self-healing capabilities without catalysts. Furthermore, the incorporation of multiwalled carbon nanotubes (MWCNTs) and nano-Fe3O4 into PNMETs leads to the fabrication of electromagnetic interference (EMI) shielding materials that possess dual characteristics of dynamically cross-linked networks and EMI shielding performance. The resulting PNMETs/MWCNT@Fe3O4 composite, utilizing the topological network rearrangement of PNMETs, demonstrates shape memory behavior, recycling and self-healing properties under infrared radiation and voltage application conditions, while also exhibiting an EMI shielding effectiveness of 20–35 dB with a thickness of less than 1 mm, meeting the standards for commercial and civilian applications. The bio-based adaptable dynamically cross-linked networks and their composites with multiple stimulus responses produced via a simple strategy hold significant potential as next generation electromagnetic shielding materials, suitable for industrial scale production. ? The Royal Society of Chemistry 2025.