Investigation of dielectric properties in polymer dispersed liquid crystal films doped with CuO nanorods

Jiang, Zhipeng; Jiao, Z.; Liu, Yourong; Zhu, Quing

doi:10.1016/j.molliq.2019.111667

Cited by 28 publications

(5 citation statements)

References 28 publications

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“…Due to their high polymer content (ca. ≥ 40.0 wt%), large-area flexible PDLC films could be fabricated through roll-to-roll process, which could realize low-cost, high-efficiency industrial production [3][4][5][6]. A good PDLC device embraces all these advantages, such as low switching voltage, quick response time, high contrast ratio, and high stability and safety [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Liquid Crystalline Acrylates on the Electro-Optical Properties and Micro-Structures of Polymer-Dispersed Liquid Crystal Films

Ma,

Wu,

et al. 2023

Crystals

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Polymer-dispersed liquid-crystal (PDLC) films have wide applications in light shutters, smart windows for cars and buildings, dimming glasses, and smart peep-proof films due to their switchable optical states under electrical fields as well as large area processibility. They are usually prepared with liquid crystals (LCs) and non-liquid crystalline monomers (NLCMs). Introduction of liquid crystalline monomers (LCMs) into PDLCs might spark new functionality or high-performance devices such as polymer-dispersed and -stabilized liquid crystals. In this study, the effect of molecular structures and doping concentrations of acrylate LCMs on the electro-optical properties and micro-structures of PDLC films is systematically studied. The pore size of polymer networks and the driving voltage of the PDLC films are affected by the molecular polarity and degree of functionality of the LCMs. The electro-optical properties of the PDLC films are affected by the synergistic influence of molecular structure of LCMs and micro-structures of PDLCs. These results might provide the experimental and theoretical basis for constructing the relationship between the molecular structure of LCM, micro-structure and electro-optical response of PDLC films.

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Section: Introductionmentioning

confidence: 99%

Effect of Liquid Crystalline Acrylates on the Electro-Optical Properties and Micro-Structures of Polymer-Dispersed Liquid Crystal Films

Ma,

Wu,

et al. 2023

Crystals

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“…Moreover, when the electric field is off, the PDLC is presented in a scattering state. Many studies on PDLC films' electro-optical properties, like the roles of the hydroxy group [9], nanoparticles [10], designed acrylate monomers [11], vacuum-integrated switchable polymers [12], elastomers [13], gold nanoparticles [14], functionalized SWCNTs [15], and so on, are based on the theory that a stabilized transparent state can only be achieved with an electric field, which results in highly increasing energy loss [2,16,17]. On the contrary, reverse-mode PSLC films show an initial transparent state along with a broad viewing angle without applying voltage and have a rather low driving voltage.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Monoacrylic Monomers on the Polymer Network Morphology and Electro-Optical Performance of Reverse-Mode Polymer Stabilized Liquid Crystal Devices

Ma,

Wu,

Song

et al. 2023

Crystals

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A polymer-stabilized liquid crystal (PSLC) device has been a promising candidate in several scenarios like smart vehicle windows and glass curtain walls in recent years due to its remarkable features like a fast switch from the initial transparent state to the scattering state with a rather low driving voltage, high transmittance at off-state, and broad viewing angle. The electro-optical characteristics of PSLC devices are determined by the synergistic attributions of liquid crystal (LC) molecules and the influence of the polymer network exerted on the movement of LC molecules. A systematic study of the influence of the polymer network on the movement of LC molecules is conducted, with the polymer network formed by methoxy/cyano/carboxyl monomers and diacrylate C6M. The polymer network morphology of PSLC film is greatly affected by the molecular structures and content of monoacrylic monomers. Additionally, the electro-optical performance and peel strength of PSLC films could be improved by modulating the molecular structures and morphology of polymer networks. PSLC devices containing carboxyl monomers show enhanced electro-optical performance and peel strength due to their directional filiform topology. This study might provide guidance for optimizing the performance of PSLC devices and establishing the relationship between the molecular structure, polymer network morphology, and electro-optical performance of reverse-mode dimming films.

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“…These nanostructured materials are now very suitable for use as additives in PDLC systems to improve the characteristics of the latter [ 22 , 23 ]. In recent years, a large number of reports have witnessed the effectiveness of metal nanoparticles, inorganic oxide nanoparticles, and ferroelectric nanoparticles in changing the physical and electro-optical properties of PDLC [ 24 , 25 , 26 , 27 , 28 , 29 ]. For example, Martin U et al [ 30 ] studied the impact of functionalized gold nanoparticles on the impedance response of nematic nanoparticle/liquid crystal dispersions in the frequency range of 0.1 Hz~100 kHz.…”

Section: Introductionmentioning

confidence: 99%

Electro-Optical Characteristics of Polymer Dispersed Liquid Crystal Doped with MgO Nanoparticles

Zhao

et al. 2022

Molecules

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In this paper, inorganic oxide MgO nanoparticles-doped polymer dispersed liquid crystal (PDLC) films were made from a mixture of the prepolymer, SLC1717 liquid crystal, and MgO nanoparticles by the polymerization induced phase separation (PIPS) process. To observe the effect of MgO concentration, PDLC was dispersed with 0.2, 0.4, 0.6, and 0.8 wt.% MgO. Electro-optical properties of the films have been investigated using LCD parameter meter and Scanning Electron Microscope (SEM) at room temperature. It is established that MgO nanoparticles affect the microstructure of PDLC films significantly because of the formed agglomerates of MgO nanoparticles. Results show an improvement in the electro-optical properties and a decrease in the driving voltage for doped systems with MgO nanoparticles. When the doping amount of MgO is 0.8 wt.%, the threshold voltage (Vth) is reduced to about 7.5 V. Therefore, MgO-doped PDLC is expected to become an excellent choice in the field of energy-saving.

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Investigation of dielectric properties in polymer dispersed liquid crystal films doped with CuO nanorods

Cited by 28 publications

References 28 publications

Effect of Liquid Crystalline Acrylates on the Electro-Optical Properties and Micro-Structures of Polymer-Dispersed Liquid Crystal Films

Effect of Liquid Crystalline Acrylates on the Electro-Optical Properties and Micro-Structures of Polymer-Dispersed Liquid Crystal Films

Study on the Effect of Monoacrylic Monomers on the Polymer Network Morphology and Electro-Optical Performance of Reverse-Mode Polymer Stabilized Liquid Crystal Devices

Electro-Optical Characteristics of Polymer Dispersed Liquid Crystal Doped with MgO Nanoparticles

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