Highly flexible and electrically controlled grating enabled by polymer dispersed liquid crystal

Wu, Keming; Sun, Jingjing; Meng, Fanxi; Fan, Meng; Kong, Xin; Cai, Minglei; Zhao, Tongzhou; Yang, Changyong; Xin, Yibo; Xing, Jun; Xing, Hongyan; Ye, Wenjiang

doi:10.1016/j.molliq.2022.118664

Cited by 11 publications

(2 citation statements)

References 31 publications

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“…An example of PDLC foil is presented in Figure 5. Under the influence of electric voltage, the arrangement of mesogens changes, giving the opportunity to control the transparency of the material [50,51]. The schematic operation of the process is presented in Figure 5.…”

Section: Application Of Liquid Crystal Polymers 41 Non-linear Opticsmentioning

confidence: 99%

Advancements in The Cross-Linking and Morphology of Liquid Crystals

Zając,

Kisiel,

Mossety-Leszczak

2024

Crystals

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The liquid crystal state (LC) in polymer chemistry is a topic discussed in varied materials research. The anisotropic properties typical of these compounds are mostly the result of the presence of mesogens in the structure of liquid crystals. This article traces the development of liquid crystal science, focusing on liquid crystal epoxy resins (LCERs) and emphasizing the crucial role of mesogens and their diverse effect on the materials. It also highlights the importance of understanding the morphology of LC polymers, explaining their profound impact on material properties and performance. It explores the cross-linking process of liquid crystal resins and composites, describing how changes in structural factors affect material structure. The article also provides information about hardeners and their influence on the cross-linked structure. Various nanofillers were also discussed, elucidating their impact on the resulting composites.

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Section: Application Of Liquid Crystal Polymers 41 Non-linear Opticsmentioning

confidence: 99%

Advancements in The Cross-Linking and Morphology of Liquid Crystals

Zając,

Kisiel,

Mossety-Leszczak

2024

Crystals

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“…Its applications are varied and include smart windows 15 , variable gratings 16 , and light modulation [17][18][19] . Although PDLC devices can be produced with exible substrates [20][21][22][23] , the traditional production methods and device structure restrict their geometries which limits their applications. The application space would be signi cantly expanded if they could be produced on a single, non-planar, substrate.…”

Section: Introductionmentioning

confidence: 99%

Aerosol jet printing polymer dispersed liquid crystals on highly curved optical surfaces and edges

Davies

Hobbs

Nohl

et al. 2022

Preprint

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We demonstrate a new technique for producing Polymer Dispersed Liquid Crystal (PDLC) devices utilising aerosol jet printing (AJP). PDLCs require two substrates to act as scaffold for the Indium Tin Oxide electrodes, which restricts the device geometries. Our approach precludes the requirement for the second substrate by printing the electrode directly onto the surface of the PDLC, which is also printed. The process has the potential to be precursory to the implementation of non-contact printing techniques for a variety of liquid crystal-based devices on non-planar substrates. We report the demonstration of direct deposition of PDLC films onto non-planar optical surfaces, including a functional device printed over the 90° edge of a prism. Scanning Electron Microscopy is used to inspect surface features of the polymer electrodes and the liquid crystal domains in the host polymer. The minimum relaxation time of the PDLC was measured at 1.3 ms with an 800 Hz, 90 V, peak-to-peak (Vpp) applied AC field. Cross-polarised transmission is reduced by up to a factor of 3.9. A transparent/scattering contrast ratio of 1.4 is reported between 0 V and 140 V at 100 Hz.

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