摘要
紫外荧光树脂基复合材料可用于航空航天大型复合材料制件牺牲层的制备,减少装配中垫片的使用,并通过牺牲层的荧光显色避免切削时伤及本体铺层。采用热熔法制备了紫外荧光双马树脂及国产T700碳纤维机织物/紫外荧光双马树脂预浸料,采用热压罐法制备了国产T700/紫外荧光双马树脂复合材料。系统研究了未添加紫外荧光粉、添加1.8%含量荧光粉、添加3.0%含量荧光粉的树脂及其复合材料的微观结构、理化性能和热膨胀系数。结果表明复合材料层合板在紫光灯的照射下显色明显,层合板发出的蓝色光线目视清晰可见。添加荧光粉后树脂基体的交联网络结构不变,树脂的反应活性有所降低,树脂浇铸体的玻璃化转变温度比未添加荧光粉树脂浇铸体最多下降3%。添加荧光粉后,复合材料的纬向拉伸强度和层间剪切强度无显著变化,复合材料热膨胀系数较未添加荧光粉复合材料最多下降12.14%。
Ultraviolet fluorescence resin composites can be used to manufacture sacrificial layers of large components in aeronautics and astronautics,for the purpose of reducing the use of shims in assembly and avoiding cutting the structural layers by the fluorescent of sacrificial layers.Ultraviolet fluorescence bismaleimide resin and T700/ultraviolet fluorescence bismaleimide resin were prepared using hot melt method.T700/ultraviolet fluorescence bismaleimide resin composite laminate was prepared using autoclave.Resins and composite laminates without phosphor,and with 1.8%and 3.0%contents phosphor are systematically studied in the aspect of microstructure,physicochemical properties and thermal expansion coefficient.The results show that the laminates of composites display fluorescence under ultraviolet lamp,and the blue light emitted by laminates can be seen clearly.The crosslinked network of the resin matrix after adding phosphor coincides well with the resin containing no phosphor,however its activity decreased.The glass transition temperature of resin casting body with phosphor was about 3%lower than that of resin casting without phosphor.After adding phosphor,the tensile strength in weft direction and inter-laminar shear strength of composite laminate have no significant change.The thermal expansion coefficient of composite laminate after adding phosphor decreased by 12.14%at most compared with that without phosphors.
作者
王迎芬
潘翠红
周洪飞
孙占红
WANG Yingfen;PAN Cuihong;ZHOU Hongfei;SUN Zhanhong(AVIC Composite Co.,Ltd.,Beijing 101300,China)
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2021年第1期74-80,共7页
Materials Science and Technology
关键词
复合材料
双马树脂
牺牲层
热膨胀系数
紫外荧光粉
composite laminate
bismaleimide resin
sacrificial layers
thermal expansion coefficient
ultraviolet phosphor
