玄武岩纤维增强脂环族改性双酚A环氧树脂的耐盐雾性能

Salt Fog Resistance of Basalt Fiber Reinforced Bisphenol A Epoxy Resin/Alicyclic Epoxy Resin Blend Modified Composites

为了提高复合绝缘横担在高温、高湿、高盐等地区的运行可靠性,需要研发具有高耐盐雾性的复合绝缘横担芯棒材料。该研究利用双酚A型环氧树脂(E–51)、脂环族环氧树脂改性双酚A环氧树脂(2021P/E–51)、增韧型二聚酸改性双酚A环氧树脂(EPD–172/E–51)3种树脂体系作为基体树脂,以高耐候性玄武岩纤维作为增强材料,制备了三类芯棒材料(BFRP–E51、BFRP–2021P、BFRP–EPD172),并对比分析了盐雾老化后三类芯棒材料的性能差异。结果表明,盐雾老化28d后BFRP–2021P及BFRP–EPD172的层间剪切性能分别降低至39.77 MPa及37.69 MPa,泄漏电流分别上升至45.70μA及45.53μA,相比于BFRP–E51具备较高的性能稳定性。并且该文通过扫描电镜及红外光谱分析证实了BFRP–2021P及BFRP–EPD172对界面耐盐雾性能的提升是其性能稳定的关键因素。BFRP–2021P及BFRP–EPD172作为复合芯棒材料在高湿高盐的运行环境下具有巨大的应用前景。

In order to increase the operational reliability of composite insulation cross-arm in high-temperature,highhumidity,hypersaline,and other areas,it is required to develop composite cross-arm core rod material with strong weather resistance.In this study,bisphenol A epoxy resin(E–51),aliphatic epoxy resin modified bisphenol A epoxy resin(2021P/E–51),and dimer acid modified bisphenol A epoxy resin(EPD–172/E–51)as matrix resins and high weatherability basalt fiber as reinforcing material were used to produce three types of basalt fiber reinforced materials(BFRP–1,BFRP–2,and BFRP–3),and the performance differences of the three types of core rods after salt-fog aging are investigated.The results revealed that,after 28 days of salt fog aging,the interlaminar shear strengths of BFRP–2021P and BFRP–EPD172 declined to 39.77 MPa and 37.69 MPa,respectively,and the leakage currents increased to 45.70μA and 45.53μA,respectively,with superior performance stability than BFRP–E51.In addition,through SEM and FTIR analysis,it was confirmed that the improvement of the salt fog resistance of the interface by BFRP–2021P and BFRP–EPD172 is the key factor for the stability of its performance.The composite core rods BFRP–2021P and BFRP–EPD172 exhibit good application prospects in high-humidity and hypersaline environments.