LED人工天窗瑞利散射材料的稳定性及光学性能研究

Stability and Optical Properties of Rayleigh Scattering Materials for LED Artificial Skylights

摘要:

以纳米二氧化钛(nano-TiO₂)为原料,选取六偏磷酸钠(SHMP)、曲拉通X-100(Tritor-X-100)、聚乙二醇(PEG)400、十二烷基硫酸钠(SDS)、十二烷基苯磺酸钠(SDBS)和十六烷基三甲基溴化铵(CTAB)做分散剂,采用超声手段在去离子水中制备得到nano-TiO₂分散液。通过UV-Vis分光光度计测量样品的吸光度,分析了超声时间、分散剂种类与浓度对样品稳定性的影响,并对样品的光学性能进行检测。研究结果表明:加入SHMP,超声处理35min可获得吸光度维持在0.1左右的稳定nano-TiO₂分散液,且在LED光源(CCT=10000K)照射下,可以实现模拟天空光照射环境的瑞利散射效果。

Abstract:

Nano-TiO₂ dispersion liquid was prepared in deionized water with ultrasonic methods by using nano-TiO₂ as the raw material, and selecting sodium hexametaphosphate (SHMP), Tritor-X-100, polyethylene glycol (PEG) 400, sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate (SDBS) and cetyl trimethyl ammonium bromide (CTAB) as the dispersants. The absorbance of the sample was measured by UV-Vis spectrophotometer, and the influence of the ultrasonic time, the type and concentration of the dispersant on the stability of the sample was analyzed, and the optical performance of the sample was tested. The results of the study show that, stable nano-TiO₂ dispersion liquid can be obtained by adding SHMP and ultrasonic treatment for 35 minutes with an absorbance of about 0.1, and under the illumination of the light source (CCT=10000K), the Rayleigh scattering effect of the simulated sky light can be achieved.