(1.南京理工大學(xué)化工學(xué)院，南京210094；
2. 上海大眾汽車有限公司寧波分公司，寧波 315336；
3. 山東誠泰安全技術(shù)咨詢有限公司，濟南250013)
摘 要: 采用自制的特種炸藥利用爆轟法合成粒徑為50nm的納米CeO2。將納米CeO2以一定比例與環(huán)氧樹脂(EP)混合，采用澆鑄的方法制備納米CeO2改性的EP薄膜。利用設(shè)計的紫外老化試驗箱對制備的薄膜進(jìn)行了21d加速老化試驗，對比測試純EP和改性EP老化前后薄膜的質(zhì)量和力學(xué)性能變化規(guī)律。結(jié)果表明：納米CeO2對紫外線表現(xiàn)出較強的屏蔽作用。當(dāng)納米CeO2在EP中的質(zhì)量分?jǐn)?shù)為0.8%時，改性EP薄膜對波長為254nm的紫外吸光度最大，EP薄膜的力學(xué)性能有所提高。相比純EP薄膜，添加納米CeO2后在紫外線條件下的使用壽命增加62%，對抗拉強度的保持率提高35%。
關(guān)鍵字: 納米氧化鈰；紫外屏蔽；環(huán)氧樹脂；改性；老化
（1.School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Ningbo Branch, Shanghai Volkswagen Co.Ltd, Ningbo 315336, China;
3.Shandong Chengtai Security Technology Consulting Co.Ltd, Jinan 250013,China）
Abstract:CeO2 nanoparticles with size of 50 nm were produced by detonation method using self-made special explosive. In order to study shielding effect to the ultraviolet, nano CeO2 and epoxy resin (EP) were mixed in a certain proportion to prepare a modified epoxy resin thin film by casting method. The prepared films were accelerated aging for 21 d in ultraviolet inside a home-made test chamber to compare with no aging case, attempting to obtain the improvement of performance and mechanical properties of modified epoxy resin film. The results show that the modified nano ceria-epoxy resin film has strong shielding effect to ultraviolet. The absorbance of modified epoxy resin film to 254nm UV wavelength is maximum when the mass fraction of nano CeO2 is 0.8%. Meanwhile, the mechanical property of the films has been improved. Compared with the pure epoxy resin, the service life of modified epoxy resin extends by 60% and the tensile strength retention rate increases by 35%.
Key words: nano CeO2; UV-shielding; epoxy resin; modification; aging
