生物基可降解环氧树脂及其碳纤维复合材料  

Bio-Based Degradable Epoxy Resin and Its Carbon Fiber Reinforced Composites

作　　者：黄子欣 祝嗣垚 刘万双 HUANG Zi-xin;ZHU Si-yao;LIU Wan-shuang(College of Textiles,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纺织学院,上海201620

出　　处：《合成纤维》2025年第4期49-53,69,共6页Synthetic Fiber in China

摘　　要：以生物基香草醛(VAN)和4,4'-二硫代二苯胺(AFD)为原料合成了一种含亚胺和二硫双动态共价键的环氧固化剂(VAN-AFD),通过傅里叶红外光谱和核磁共振波谱表征了固化剂的化学结构。利用VAN-AFD对环氧树脂单体进行固化,得到的环氧树脂固化物具有优良的力学和热学性能,其拉伸强度为70.3 MPa,玻璃化转变温度为112℃。由于在环氧树脂交联结构中引入了两种动态共价键,VAN-AFD固化的环氧树脂可以在常温己胺溶液或2-巯基乙醇溶液中在发生化学降解,且在己胺溶液中表现出更快的降解速率。以VAN-AFD固化环氧树脂为基体制备了碳纤维增强复合材料,其拉伸强度为716 MPa,且可通过在己胺溶液中降解树脂基体实现无损回收碳纤维。A curing agent(VAN-AFD) based on imine and disulfide dual-dynamic covalent bonds was synthesized using bio-based vanillin(VAN) and 4,4'-dithiodianiline(AFD) as raw materials.Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy were used to verify the chemical structure of the curing agent.The epoxy resin monomer was cured with VAN-AFD.The cured epoxy resin exhibited excellent mechanical and thermal properties,with a tensile strength of 70.3 MPa and a glass transition temperature of 112 ℃.Due to the two introduced dynamic covalent bonds,the epoxy resin cured with VANAFD could degrade in hexylamine and 2-mercaptoethanol solutions at room temperature,with a faster degradation rate in hexylamine solution.Furtherly,a carbon fiber reinforced composites was prepared using VAN-AFD cured epoxy resin as the matrix.The resulting composites exhibited superior tensile strength(716 MPa) and could be recycled without damage through the degradation of the resin matrix in hexylamine solution.

关 键 词：环氧树脂 动态共价键 可降解 碳纤维增强复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程] O633.13[理学—高分子化学]