Bio-based Epoxy Composites Demonstrating High Temperature Breakdown Strength and Thermal Conductivity for High Voltage Insulation  

作　　者：Ke-Rong Yang Jin-Yue Dai Shuai-Peng Wang Wei-Wei Zhao Xiao-Qing Liu 

机构地区：[1]Key Laboratory of Advanced Marine Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China

出　　处：《Chinese Journal of Polymer Science》2025年第1期40-52,I0006,共14页高分子科学(英文版)

基　　金：supported by the China Postdoctoral Science Foundation(No.2023M743622);Natural Science Foundation of Ningbo City(No.2024J109);National Natural Science Foundation of China(Nos.E52307038 and U23A20589);Ningbo 2025 Key Scientific Research Programs(Nos.2022Z111,2022Z160 and 2022Z198);the Leading Innovativeand Entrepreneur Team Introduction Program of Zhejiang(No.2021R01005).

摘　　要：The demand for energy-efficient and environmental-friendly power grid construction has made the exploitation of bio-based electrical epoxy resins with excellent properties increasingly important.This work developed the bio-based electrotechnical epoxy resins based on magnolol.High-performance epoxy resin(DGEMT)with a double crosslinked points and its composites(Al_(2)O_(3)/DGEMT)were obtained taking advantages of the two bifunctional groups(allyl and phenolic hydroxyl groups)of magnolol.Benefitting from the distinctive structure of DGEMT,the Al_(2)O_(3)/DGEMT composites exhibited the advantages of intrinsically high thermal conductivity,high insulation,and low dielectric loss.The AC breakdown strength and thermal conductivity of Al_(2)O_(3)/DGEMT composites were 35.5 kV/mm and 1.19 W·m-1·K-1,respectively,which were 15.6%and 52.6%higher than those of petroleum-based composites(Al_(2)O_(3)/DGEBA).And its dielectric loss tanδ=0.0046 was 20.7%lower than that of Al_(2)O_(3)/DGEBA.Furthermore,the mechanical,thermal and processing properties of Al_(2)O_(3)/DGEMT are fully comparable to those of Al_(2)O_(3)/DGEBA.This work confirms the feasibility of manufacturing environmentally friendly power equipment using bio-based epoxy resins,which has excellent engineering applications.

关 键 词：Bio-based epoxy composites MAGNOLOL Breakdown strength Thermal conductivity Dielectric loss 

分 类 号：TB332[一般工业技术—材料科学与工程] TM21[电气工程—电工理论与新技术]