Effects of terpene alcohol dopant on the morphology and electro‐optical properties of polymer‐dispersed liquid‐crystal composite films

Huang, Junyi; Yu, Meina; Ren, Yunxiao; Zhang, Lanying; Yang, Huai

doi:10.1002/pat.5424

Cited by 5 publications

(3 citation statements)

References 47 publications

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“…Figure S4 showed that with the introduction of polymer walls, the t on decreased and the t off increased because the size of LC droplets increased (consistent with Figure S3). ,, …”

Section: Resultsmentioning

confidence: 99%

“…Figure S4 showed that with the introduction of polymer walls, the t on decreased and the t off increased because the size of LC droplets increased (consistent with Figure S3). 17,35,36 Figure 3 illustrated that the polymer walls could significantly improve the stability of reverse-mode PSLC films. The sparse and fine polymer networks were more easily destroyed after multiple cycles for the films without polymer walls.…”

Section: Effect Of the Introduction Of Polymer Walls On Electro-optic...mentioning

confidence: 99%

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Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Ren

et al. 2022

ACS Appl. Mater. Interfaces

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Reverse-mode polymer-stabilized liquid crystal (PSLC) films have wide applications in smart windows for cars as well as buildings and dimming glasses due to their low haze, low energy consumption, and better safety in case of emergency power off. However, PSLC films usually have poor stability of electro-optical properties due to their low polymer content (ca. 5 wt %), and it still remains a challenging task to improve the stability and processability by increasing the polymer content in PSLC as the driving voltage might dramatically increase. In this work, a reverse-mode PSLC film with polymer walls was prepared, which showed excellent stability of electro-optical properties even after 150 000 cycles. The film was prepared through polymerization with a photomask, in which the monomers concentrated on specific areas to form patterned polymer walls. In this way, the polymer content could be increased dramatically and the anchoring effect would not be too strong, thus avoiding a sharp increase in the driving voltage. As a result, the desired reverse-mode film with high stability, relatively low driving voltage, and high contrast ratio was obtained. The effects of monomer compositions, curing temperature, UV light intensity, and the pattern of the photomask on the microstructures, as well as electro-optical performances of the films were carefully studied. This work provides a new idea for the preparation of reverse-mode electrically switchable light-transmittance controllable films with excellent stability and good electro-optical performance, which would broaden their application in smart cars, building windows, and dimming glasses for light management and potential energy saving.

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“…Figure S4 showed that with the introduction of polymer walls, the t on decreased and the t off increased because the size of LC droplets increased (consistent with Figure S3). ,, …”

Section: Resultsmentioning

confidence: 99%

Section: Effect Of the Introduction Of Polymer Walls On Electro-optic...mentioning

confidence: 99%

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Ren

et al. 2022

ACS Appl. Mater. Interfaces

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“…Isomers with the same chemical formula but different structure might have different influences on PDLC films 44 . Nevertheless, the research is limited.…”

Section: Resultsmentioning

confidence: 99%

Effects of acrylate monomers with different alkyl chain structure on the electro‐optical properties and microstructure of polymer dispersed liquid crystals

Wang

et al. 2022

J of Applied Polymer Sci

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Polymer dispersed liquid crystals (PDLCs) have shown great potential in applications, such as displays and smart windows. However, the driving voltage and contrast ratio are still far from requirement. In this work, acrylate monomers with different alkyl chains were applied to prepare PDLC films. Then the electro‐optical performance and microstructure were characterized and compared. Results show that the contrast ratio can be improved by nearly 50% through adjusting the alkyl chain length. Meanwhile, the slightly increased driving voltages can be compensated by introducing branched chains. Contrarily, isomeric structure with more branched chains but short chain length would not contribute much. The chain structure can affect the phase separation process and furtherly the interaction between polymer matrix and liquid crystal droplets. Finally, an optimized PDLC film with high contrast ratio over 100 was demonstrated, which showed two distinct states: highly transparent state with transmittance over 87% at a 0.52 V μm−1 electric field and strong scattering state with transmittance less than 1% in the absence of an electric field. It is anticipated that the research can provide more design choices from material perspective and pave the way for further industrial utilizations of PDLC films.

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Second- and third-order nonlinear optical properties of mono-substituted terpenoid-like chalcones

Manoel

Pelosi

Cocca

et al. 2022

Journal of Photochemistry and Photobiology A: Chemistry

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Effects of terpene alcohol dopant on the morphology and electro‐optical properties of polymer‐dispersed liquid‐crystal composite films

Cited by 5 publications

References 47 publications

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Effects of acrylate monomers with different alkyl chain structure on the electro‐optical properties and microstructure of polymer dispersed liquid crystals

Second- and third-order nonlinear optical properties of mono-substituted terpenoid-like chalcones

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