The fabrication of novel optical diffusers based on UV-cured polymer dispersed liquid crystals
The fabrication of novel optical diffusers based on UV-cured polymer dispersed liquid crystals
复制标题
基于紫外固化聚合物分散液晶的新型光学扩散器的制备
DOI：
10.1080/02678292.2018.1477210
复制
发表时间：
2019-01-02
期刊：
影响因子：
2.2
通讯作者：
Zhang, Lanying
中科院分区：
文献类型：
--
作者：
Ma, Haipeng;Zhou, Le;Zhang, Lanying
基于紫外（UV）光固化丙烯酸酯单体/液晶复合材料制备具有不同尺寸液晶滴的聚合物分散液晶（PDLC）来制造光学扩散膜。为了获得具有高光学性能的光扩散片，研究了单体结构和紫外光强度对PDLC薄膜微观结构的影响。结果表明，PDLC薄膜在保持可见光区高透过率的前提下表现出较强的光散射性能。由于液晶液滴呈球形分散在聚合物网络中，当液晶液滴尺寸约为3.0μm时，雾度可达88.5%，透过率接近90.0%，可用作底部扩散膜。而当液晶液滴尺寸约为10.0μm时，雾度和透过率分别为39.2%和90.2%；因此，它可能是顶部扩散膜的不错选择。具有制备简单、卷对卷工业化生产和光学性能可调等优点，支持基于UV固化PDLC薄膜的薄膜可以作为优秀的光学扩散膜应用于液晶显示行业。
Polymer dispersed liquid crystals (PDLCs) with different sizes of the LC droplets are prepared based on the ultraviolet (UV) light curable acrylate monomers/LCs composites to fabricate the optical diffuser films. To acquire light diffusers with high optical performance, the effects of the monomer structure and the UV light intensity on the micro-structure of the PDLC films are studied. Results show that the PDLC films could exhibit a strong light scattering at the premise of maintaining high transmittance in the visible region. As the LC droplets are spherically dispersed in the polymer networks, when the size of LC droplets is about 3.0 μm, the haze can reach 88.5% and the transmittance is nearly 90.0%, which can be used as a bottom diffuser film. While when the size of LC droplets is about 10.0 μm, the haze and transmittance are 39.2% and 90.2%, respectively; hence, it can be a good choice for a top diffuser film. With the advantages of simple preparation, roll-to-roll industrial production and tunable optical properties, it is supported that the films based on UV-cured PDLC films can be applied as outstanding optical diffuser films in the liquid crystal display industry.