ABSTRACT

Due to the switchability between transparent and light-scattering states, polymer-dispersed liquid crystals (PDLCs) are widely used as smart windows, flexible display devices, projectors and other devices. In this work, we propose a new composite system containing TiO₂ nanoparticles (NPs), liquid crystals and polymer that have low driving voltage, high contrast ratio (CR) and quick response ability. Distinguishing from the traditional PDLC system, the coexisting structure of vertically oriented polymer fibres (VOPFs) inside the porous polymer matrix was constructed and the TiO₂ nanoparticle (NP) after functionalisation was introduced. It was found that the introduction of an appropriate amount of functionalised TiO₂ NPs can effectively improve the electro-optical properties of the composite system. This new system provides a new idea for solving the compatibility problem of inorganic particles and organic matter.

摘要

由于透明和光散射状态之间的可切换性，聚合物分散液晶（PDLC）被广泛用作智能窗户、柔性显示设备、投影仪等设备。在这项工作中，我们提出了一种新的复合体系，它包含 TiO ₂纳米颗粒 (NPs)、液晶和聚合物，具有低驱动电压、高对比度 (CR) 和快速响应能力。与传统的PDLC体系不同，在多孔聚合物基体内部构建了垂直取向聚合物纤维（VOPFs）的共存结构，并引入了功能化后的TiO ₂纳米颗粒（NP）。发现引入适量的官能化 TiO ₂NPs可以有效提高复合体系的电光性能。这一新体系为解决无机颗粒与有机物的相容性问题提供了新思路。