文献类型：期刊文献

英文题名：High-Strength and Upcyclable Bio-Based Epoxy Foams Enabled by Dynamic Networks for Multifunctional Applications

作者：Tian, Yabing[1,2,3] Wang, Peng[1] Wang, Jing[1] Huang, Xujuan[4] Shang, Shibin[1] Jiang, Jianxin[3] Zhang, Haibo[1] Chen, Yuxiang[1]

第一作者：Tian, Yabing

机构：[1] National Key Laboratory for Development, Utilization of Forest Food Resources, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, China; [2] Jiangsu Co-Innovation Center of Efficient Processing, Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, China; [3] College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China; [4] School of Chemical and Chemistry, Yancheng Institute of Technology, Yancheng, 224051, China

年份：2025

外文期刊名：SSRN

收录：EI(收录号：20260010448)

语种：英文

外文关键词：Aerospace industry - Electromagnetic pulse - Electromagnetic shielding - Rigid foamed plastics - Shape memory effect

摘要：Thermosetting epoxy foams are indispensable in the construction and aerospace industries; however, their widespread use presents challenges such as unsustainability and "white pollution". While bio-based foams have garnered significant attention, their mechanical performance and recyclability are often insufficient for practical applications. Herein, a bio-based epoxy foam featured with dynamic networks was constructed using turpentine and tung oil-derived precursors via a one-step limited-foaming method. The introduction of dynamic ester bonds and rigid structural units significantly enhanced compressive strength (16.33 ± 0.22 MPa) and thermal stability (T5% = 268 °C), while enabling remarkable shape-memory and self-healing capabilities. Furthermore, the foam demonstrated efficient chemical degradability, and its degradation products were successfully upcycled into lightweight polyurethane foams (PUFs) with improved mechanical and thermal properties. By incorporating multi-walled carbon nanotubes (MWCNTs) and electroless silver plating, advanced Ag-plated composite foams F3/MWCNTs/Ag were obtained, achieving outstanding electromagnetic interference (EMI) shielding effectiveness (79.87 dB) and Joule heating performance (up to 125.3 °C at 1.0 V). These findings establish a rational design strategy for multifunctional, recyclable polymer foams that simultaneously overcome challenges of unsustainability, high cost, limited mechanical robustness, and electromagnetic pollution. ? 2025, The Authors. All rights reserved.