农用转光膜的性能研究

Study on Property of Light Conversion in Agricultural Films

以碱土金属硫化物为基质的CaS .aEu2 +.bM (M =Mn2 +、Er2 +等 )转光剂 ,粒径 1.79～ 5 .81μm ,制得转光膜具有转紫外光 2 79nm发射λem=390nm和λem=632nm红光以及转 5 38nm绿光为λem=635nm红光的特性 ;转光行为有仿生态特征 ,有利于提高作物对光能的利用率 ;透光率测试结果显示 ,转光膜能改善透过光质 ,使透过绿光减少 0 32 % ,红光增强 0 .2 7% ;经有机化改性处理 ,转光膜具有较好的防潮和抗荧光衰减性能 ,实地扣棚 9个月后仍有 30 %的荧光发射I相对 。应用试验表明转光膜可改善作物品质 ,使甜瓜可溶性糖、淀粉、蛋白质含量分别提高4.6% ,4.9% ,9.1% ,实现增产 14 .74%。

The agricultural film,making use of CaS.aEu 2+.bM(M=Mn 2+、Er 2+) as light conversion agent whose base material is alkali earth metal sulfide,and its main particle size distribution is in range of 1.79～5.81 μm,has light conversion properties in absorbing effectively the ultraviot light of λ em=279 nm and emiting viot light of λ em=390 nm and red light of λ em=632 nm, the film can also transfer the green light of λ em=538 nm into the red light of λ em=635 nm.Light conversion behavior has a resemblant ecological feature and profits to raise light energy utilixation ratio of crops.Light transmittance ratio test results indicate that the light conversion film can improve the transmission light quality,and make the transmission green light down 0.32 %,red light up 0.27 %.Through the modification in organic way,the light conversion film is moisture-proof and fluorescent anti-decay which still keeps fluorescent emission in 30 % I (a.u) after 9 months in farmland.Application tests show that the light conversion film can improve the quality of crops,and make the content of solubility sugar,starch and protein in muskmelon up 4.6 %,4 95 %,9.1 % respectively, production up about 14.74 %.