摘要
以乙酸乙烯酯和丙烯酸铕的共聚物（VAA—Eu）与乙烯-乙酸乙烯酯共聚物（EVA）的共混物（EVA／VAA—Eu）制备薄膜，通过测定荧光光谱和透过薄膜的紫外光辐照度，研究其对紫外光的遮挡和光转换作用．结果表明VAA—Eu的发光依赖于激发光波长，用254nm紫外光照射或在阳光下．ω（Eu）为0．06％～0．08％时遮挡和光转换作用达到最大值．而用365nm紫外光照射，当ω（Eu）为0．04％时遮挡和光转换可达最好效果．EVA／VAA—Eu薄膜对阳光中紫外光具有遮挡，吸收和光转换的功能．能将其转换成促进绿色植物光合作用的蓝紫、黄和红光，可用作多功能的农用薄膜．
The copolymer （VAA-Eu） of vinyl acetate and europium acrylate is blended with ethylene-vinyl acetate copolymer （EVA） to prepare a blend （EVA/VAA-Eu） film. The screen and light conversion effect of EVA/VAA-Eu film is studied by fluorescence luminescenece spectrum and the irradiance of ultraviolet light transmitting the film. The results show that VAA-Eu photoluminescence properties are wavelenght-dependent on the excitation ultraviolet light. Irradiated with 254 nm ultraviolet light or in the sun, the screen and fight conversion effect of the film reaches the maximum value as ω （Eu） is 0. 06%-0. 08%. While irradiated with 365 nm ultraviolet light, the effect of the screen and light conversion reaches the best as ω （Eu） is 0.04 %. EVA/VAA-Eu film serves the function of screening, absorbing and light-converting the sunrays, and it converts the sunrays into blue-violet, yellow and red light that can promote green plant photosynthesis. As a result, the EVA/VAA- Eu film could be used as a multifunctional agricultural film.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第5期58-62,共5页
Journal of Fujian Normal University：Natural Science Edition
基金
福建省自然科学基金资助项目(E0510016)
关键词
乙烯-乙酸乙烯酯共聚物
丙烯酸铕
紫外光
遮挡
光转换
ethylene-vinyl acetate copolymer
europium acrylate
ultraviolet light
screen
light-convertion
