表面无序亚微米结构高效扩散膜  

Efficient diffusers with surface disordered submicron structures

作　　者：王敏[1] 薛旭峰[1] 叶雄英[1] 

机构地区：[1]清华大学精密仪器系精密测试技术及仪器国家重点实验室,北京100084

出　　处：《光学精密工程》2014年第11期2937-2944,共8页Optics and Precision Engineering

基　　金：北京市自然科学基金资助项目(No.3122021)

摘　　要：提出了表面无序亚微米结构高雾度和高透光率扩散膜的制备方法。通过模板复制法,基于硅锥模板和阳极氧化铝模板制备了具有表面无序亚微米结构的聚二甲基硅氧烷(PDMS)和聚苯乙烯(PS)薄膜。结果表明,表面无序亚微米结构可以显著增加薄膜的雾度。结构的形貌和尺寸对薄膜光扩散性能有重要影响,其中利用锥径650nm的硅锥模板得到的具有表面无序亚微米孔结构的PDMS薄膜的雾度达到92%,透光率为90.9%,有效散射系数为83.7%;同一模板制备的PS薄膜的雾度达到97.9%,透光率为85%,有效散射系数为83.2%;这二种微结构薄膜都可用作高效扩散膜。结果表明:利用硅锥模板制备这种高效扩散膜,工艺简单、成本低,对聚合物材料没有选择性,有望实现高性能扩散膜的大规模生产。A preparation method for diffusers with surface disordered submicron structures was proposed,which are characterized by a higher haze property and higher transmittance.By replication method,the diffusers with surface disordered submicron structures were prepared based on siliconcone molds and anodic aluminum oxide molds for polydimethylsiloxane （PDMS） and polystyrene （PS）.It demonstrates that the surface disordered submicron structures significantly enhance the haze properties of polymer films.Moreover,the morphologies and dimensions of the submicron structures have important effects on the diffusing property of the polymer films.The fabricated PDMS films with disordered submicron-holes replicated from a silicon-cone mold with a cone diameter of 650 nm has a haze of 92％,a transmittance of 90.9％ and an effective diffusion coefficient of 83.7％.Accordingly,the haze,transmittance and effective diffusion coefficient of PS films obtained from the same siliconcone mold are 97.9 ％,85 ％ and 83.2 ％,respectively.Both films diffuse light effectively and are used as diffusers properly.The results indicate that using silicon-cone mold based replication method to fabricate the efficient diffusers is simple,low-cost and compatible with different polymers,and is able to be employed for mass production.

关 键 词：聚合物薄膜 扩散膜 表面亚微米结构 模板复制 雾度 聚二甲基硅氧烷(PDMS) 聚苯乙烯(PS) 

分 类 号：O484.1[理学—固体物理] TB383[理学—物理]