Zhou Le, Ma Haipeng, Han Cheng, Hu Wei, Zhang Shuaifeng, Zhang Lanying, Yang Huai
Department of Materials Science and Engineering, College of Engineering, Peking University Beijing 100871 People's Republic of China
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing Beijing 100083 People's Republic of China.
RSC Adv. 2018 Jun 13;8(39):21690-21698. doi: 10.1039/c8ra03426e.
A novel light diffuser based on a thermally cured polymer dispersed liquid crystal (PDLC) film was facilely fabricated by the thermal curing of epoxy monomers with thiols and polyamine (PA) in a composite solution of monomers and liquid crystals (LCs) sandwiched by two clean polyethylene terephthalate (PET) substrates. Varied amounts of LCs, diluent effects of epoxy resins and thiols and different curing temperatures have been investigated in the preparation of the films, and the optical properties (total transmittance and transmittance haze) and the light diffusing abilities of these films were also studied. As the microstructures of the polymers in the films were analysed using light scattering theory, it was revealed that the total transmittance of the novel light diffuser, with a combined polymer morphology of polymer networks and polymer balls, can reach 93% by simultaneously possessing a high transmittance haze (95%). The novel light diffuser, based on thermally cured PDLCs, possesses a good diffusion capacity and will have promising potential applications in military projects and liquid crystal display (LCDs) devices.
通过在夹于两个干净聚对苯二甲酸乙二酯（PET）基板之间的单体和液晶（LC）复合溶液中，使环氧单体与硫醇和多胺（PA）进行热固化，简便地制备了一种基于热固化聚合物分散液晶（PDLC）膜的新型光扩散器。在制备薄膜过程中，研究了不同量的液晶、环氧树脂和硫醇的稀释效应以及不同的固化温度，还研究了这些薄膜的光学性能（总透过率和透过率雾度）以及光扩散能力。当利用光散射理论分析薄膜中聚合物的微观结构时发现，具有聚合物网络和聚合物球组合聚合物形态的新型光扩散器，通过同时拥有高透过率雾度（95%），其总透过率可达到93%。这种基于热固化PDLC的新型光扩散器具有良好的扩散能力，在军事项目和液晶显示器（LCD）设备中具有广阔的潜在应用前景。
