Wang Jiayan, Qiao Yan, Yang Ziyi, Han Yue, Zhang Hui, Li Zhiguang, Zheng Guili, Zhang Yanjun, Zhu Lizhi
Arizona College of Technology, Hebei University of Technology, Tianjin 300401, China.
School of Science, Hebei University of Technology, Tianjin 300401, China.
Molecules. 2025 Aug 5;30(15):3273. doi: 10.3390/molecules30153273.
The present study focuses on the effect of doping KH560-modified cellulose nanocrystals (CNCs) on the electro-optical characteristics of polymer-dispersed liquid crystals (PDLCs). PDLC films were fabricated through the polymerization-initiated phase separation (PIPS) process and doped with CNC nanoparticles at various concentrations. At low concentrations, the CNCs at the interface, by virtue of their unique chiral characteristics, induce an orderly arrangement of liquid crystal molecules. Meanwhile, the interaction between the film's fiber structure and the liquid crystal droplets brings about an augmentation in the arrangement efficiency. The excellent dispersion of CNCs diminishes the random alignment of liquid crystal molecules and mitigates light scattering. Additionally, it aids in the deflection of the liquid crystal director, facilitating the lubrication of the liquid crystals' movement. It is remarkable that within the range of relatively lower CNCs doping concentrations, specifically from 0.005 wt% to 0.05 wt%, the PDLC films exhibit lower threshold and saturation voltages, faster response, enhanced viewing angle performance and higher contrast.
本研究聚焦于掺杂KH560改性纤维素纳米晶体（CNCs）对聚合物分散液晶（PDLCs）电光特性的影响。通过聚合引发相分离（PIPS）工艺制备了PDLC薄膜，并掺杂了不同浓度的CNC纳米颗粒。在低浓度下，界面处的CNCs凭借其独特的手性特征，诱导液晶分子有序排列。同时，薄膜的纤维结构与液晶微滴之间的相互作用提高了排列效率。CNCs的优异分散性减少了液晶分子的随机排列，减轻了光散射。此外，它有助于液晶指向矢的偏转，促进液晶运动的润滑。值得注意的是，在相对较低的CNCs掺杂浓度范围内，即从0.005 wt%到0.05 wt%，PDLC薄膜表现出更低的阈值和饱和电压、更快的响应速度、增强的视角性能和更高的对比度。
