【作者】 黄金瑞； 胡芳芳； 聂小安；

【Author】 Jinrui Huang;Fangfang Hu;Xiaoan Nie;Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry;

【机构】 中国林业科学研究院林产化学工业研究所国家林产化学工程技术研究中心；

【摘要】 针对油脂基环氧树脂刚性不足以及高度交联后柔韧性较差的科学技术问题,本研究通过缩短环氧基之间的脂肪链段和四乙烯五胺改性碳纳米管的引入,高度交联了桐油基环氧树脂,极大地提高桐油基环氧树脂强度、模量和耐热性;并利用碳纳米管自身特性增强、增韧桐油基环氧树脂,从而制备出综合性能优于双酚A型环氧树脂(T_g:77.96°C,拉伸强度:52.74 MPa,杨氏模量:2.50 GPa,断裂伸长率:2.52%,韧性:0.83 MJ·m^-3)的刚柔并济桐油基环氧树脂复合材料(T_g:89.13°C,拉伸强度:61.08 MPa,杨氏模量:2.60 GPa,断裂伸长率:8.11%,韧性:3.96 MJ·m^-3)。更多还原

【Abstract】 To address the problem of low modulus of oil-based epoxy resin and poor flexibility of the epoxy resin with high crosslink density, in this study, the strength,modulus and glass transition temperature（Tg） of tung oil based epoxy resin（TOEP） is improved significantly by enhancing the crosslink density via shortening the fatty segment between epoxy groups and the introduction of tetraethylenepentamine modified carbon nanotube（TEPA@CNT）. Meanwhile, TOEP is toughened and reinforced by adding TEPA@CNT because of its intrinsic characteristics. Therefore,robust and tough TOEP is fabricated(T_g: 89.13 °C, tensile strength: 61.08 MPa,Young’s modulus: 2.60 GPa, elongation at break: 8.11%, toughness: 3.96 MJ·m^-3),which is much higher than diglycidyl ether of bisphenol A(T_g: 77.96 °C, tensile strength: 52.74 MPa, Young’s modulus: 2.50 GPa, elongation at break: 2.52%,toughness: 0.83 MJ·m^-3).更多还原