摘要
采用偶联剂KH560对短切玻璃纤维(玻纤)进行改性,并以改性短切玻纤作为增强材料制备得到玻纤/环氧树脂复合材料。随着玻纤质量分数的增加,材料的拉伸、弯曲和冲击强度均呈现先增大后减小的趋势。当玻纤填充质量分数为10%时,材料的力学增强、增韧效果达到最佳。SEM表征表明玻纤与树脂基体界面结合良好,可以有效传递树脂与玻纤间的应力,且玻纤的介入也可有效阻挡裂纹的扩展,起到增强、增韧作用。然而当玻纤质量分数过高时,由于材料的分散性变差,其力学性能下降。复合材料经短时间的紫外老化后,因紫外光氧作用颜色发生很大变化,然而由于玻纤具有很好的化学稳定性,可以延缓紫外氧化损伤进一步深入到材料内部,材料的外观颜色变化开始放缓。在水分作用下,树脂也会发生一定的水解。这些破坏使材料的力学性能随着老化时间的延长不断降低。上述研究可为后续开发用于替代金属电力金具的性能更优越的玻纤增强环氧树脂提供理论基础。
Glass fiber-reinforced epoxy resin composites were prepared,with the glass fibers pretreated using KH560.It was observed that the tensile,bending,and impact strengths of the composites initially increased and then decrease with an increase in glass fiber content.An optimal glass fiber content(10%by mass fraction)was identified at which the composites exhibited the highest mechanical strength and toughness.SEM images revealed that the interfacial adhesion between the glass fiber and resin matrix is strong,leading to improved stress transfer at the interface.Meanwhile,the introduction of glass fiber also retarded crack propagation,thereby enhancing the strength and toughness of the resin.However,an excessive glass fiber content would lead to the reduction in the mechanical performance of the composites due to fiber aggregation.The appearance of the composites significantly changed after a short period of UV aging.Nevertheless,the excellent chemical stability of the glass fiber could delay the UV oxidative photodegradation of the materials,especially in their depth.The resin would also undergo some hydrolysis when exposed to,which resulted in a reduction in the mechanical performance of the materials during aging.The aforementioned study provides a theoretical basis for the subsequent development of glass fiber-reinforced epoxy resin with improved performance,to replace metal power fittings.
作者
张冲标
高博
李运钱
陆阳
ZHANG Chongbiao;GAO Bo;LI Yunqian;LU Yang(Jiashan Power Supply Co.,Ltd.,State Grid Zhejiang Electric Power Co.,Ltd.,Jiaxing 314100,China)
出处
《浙江工业大学学报》
北大核心
2024年第1期100-104,共5页
Journal of Zhejiang University of Technology
基金
国网浙江省电力有限公司省管产业单位科技项目(2021-KJLH-JS-019)。
关键词
环氧树脂
玻璃纤维
复合材料
力学性能
耐老化性能
epoxy resin
glass fiber
composites
mechanical properties
aging-resistant properties
