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研究了Ultraviolet A(UVA)紫外辐射对碳纤维增强环氧树脂基复合材料产生的影响。测量和分析了从窗户照射到室内太阳光和日光灯辐射的UVA紫外线辐照度,研究了碳纤维增强环氧树脂基复合材料经辐照度为200μW.cm-2的UVA紫外灯辐射处理后的力学性能变化,并通过XPS、接触角、纳米压痕、原子力显微镜(AFM)测试方法研究了其表面性能变化。结果表明:春夏季节晴天室内太阳光紫外辐照度在14点时达到最大值,距离窗户0m处最大值为375μW.cm-2,1m处最大值迅速降至30μW.cm-2;对功率40W的日光灯,距离日光灯0m处,紫外辐照度为87.3μW.cm-2,1m处快速降至5.4μW.cm-2;经过45天的紫外辐射,碳纤维增强环氧树脂基复合材料的层间剪切强度、弯曲强度和拉伸强度无明显变化;碳纤维增强环氧树脂基复合材料表面发生氧化反应,表面硬度和粗糙度变大。
The effect of UVA radiation on the carbon fiber reinforced epoxy matrix composites was investigated. The UVA irradiance from the window to indoor sunlight and fluorescent lamp radiation was measured and analyzed. The mechanical properties of the carbon fiber reinforced epoxy resin matrix composites irradiated by UVA UV lamp with the irradiance of 200μW · cm-2 The change of surface properties was investigated by XPS, contact angle, nanoindentation and atomic force microscopy (AFM). The results showed that the solar irradiance reached the maximum value at 14 o’clock in spring and summer sunny day, the maximum value at the distance of 0m from the window was 375μW.cm-2, the maximum value at 1m decreased rapidly to 30μW.cm-2, 40W fluorescent lamp, away from the fluorescent lamp at 0m, the UV irradiance of 87.3μW.cm-2, 1m quickly dropped to 5.4μW.cm-2; after 45 days of UV radiation, carbon fiber reinforced epoxy matrix composite layer The interfacial shear strength, flexural strength and tensile strength had no obvious change. The oxidation reaction on the surface of carbon fiber reinforced epoxy resin matrix composites resulted in the increase of surface hardness and roughness.