风电用高性能拉挤成型环氧树脂复合材料的制备与性能

Preparation and Properties of High-performance Pultruded Epoxy Resin-based Composites for Wind Turbine Blades

以双酚A型环氧树脂为基体,G2019环氧树脂为改性树脂,己二醇二缩水甘油醚为稀释剂,复配出高韧性复合型环氧树脂体系,通过拉挤成型工艺制得风电叶片用高性能环氧树脂基玻璃纤维增强复合材料,并对其力学性能和电气性能进行研究。结果表明:所得复合型环氧树脂体系可作为高韧性环氧树脂基体,当G2019环氧树脂含量为30份时,环氧树脂复合体系浇铸体的冲击强度达到25.1 kJ/m^(2),与纯双酚A型环氧树脂浇铸体的冲击强度相比提升了151.5%,交流和直流电气强度分别达到48 kV/cm和65 kV/cm。拉挤成型环氧树脂基玻璃纤维增强复合材料具有优异的力学性能和电气性能,能够满足风电领域的应用需求。

A high toughness composite epoxy resin system was prepared with bisphenol A epoxy resin as matrix,G2019 epoxy resin as the modified resin and hexanediol diglycidyl ether as diluent. The high-performance epoxy resin-based glass fiber reinforced composites for wind turbine blades were fabricated via the pultrusion process,and their mechanical and electrical properties were studied. The results show that the obtained composite epoxy resin system can be used as a high toughness epoxy resin matrix. When the content of G2019 epoxy resin is 30 phr,the impact strength of the epoxy resin composite system casting reaches 25.1 kJ/m^(2), which is 151.5% higher than that of the pure bisphenol A epoxy resin, and the AC and DC electric strength reaches 48 kV/cm and 65 kV/cm,respectively. The pultruded epoxy resin-based glass fiber reinforced composites show outstanding comprehensive mechanical and electrical performances, which can meet the application requirements of wind power fields.