Studies on electro-optical properties of polymer dispersed liquid crystal films based on epoxy resins prepared by UV-initiated cationic polymerisation

Song, Ping; Yu, Liqun; Cao, Hui; Wang, Feifei; Liu, Fang; Zhang, Cuihong; Yang, Chaoyong; Yang, Huai

doi:10.1080/02678292.2011.643247

Cited by 16 publications

(3 citation statements)

References 22 publications

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“…In addition, the anchoring force of the polymer matrix is also related to the interaction between polymers and LC molecules in PDLCs [49]. Therefore, the surface energy of the polymers containing different POSS-SH content was employed to evaluate the anchoring force on the LC molecules [42,43].…”

Section: Resultsmentioning

confidence: 99%

Silicon nanostructure-doped polymer/nematic liquid crystal composites for low voltage-driven smart windows

Zhang

et al. 2021

Nanotechnology

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In this work, two silicon nanostructures were doped into polymer/nematic liquid crystal composites to regulate the electric-optical performance. Commercial SiO2 nanoparticles and synthesized thiol polyhedral oligomeric silsesquioxane (POSS-SH) were chosen as the dopants to afford the silicon nanostructures. SiO2 nanoparticles were physically dispersed in the composites and the nanostructure from POSS-SH was implanted into the polymer matrix of the composites via photoinduced thiol-ene crosslinking. Scanning electron microscopy results indicated that the implantation of POSS microstructure into the polymer matrix was conducive to obtaining the uniform porous polymer microstructures in the composites while the introduction of SiO2 nanoparticles led to the loose and heterogeneous polymer morphologies. The electric-optical performance test results also demonstrated that the electric-optical performance regulation effect of POSS microstructure was more obvious than that of SiO2 nanoparticles. The driving voltage was reduced by almost 80% if the concentration of POSS-SH in the composite was nearly 8 wt% and the sample could be completely driven by the electric field whose voltage was lower than the safe voltage for continuous contact (24 V). This work could provide a creative approach for the regulation of electric-optical performance for polymer/nematic liquid crystal composites and the fabrication of low voltage-driven PDLC films for smart windows.

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Section: Resultsmentioning

confidence: 99%

Silicon nanostructure-doped polymer/nematic liquid crystal composites for low voltage-driven smart windows

Zhang

et al. 2021

Nanotechnology

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“…Polymer dispersed liquid crystals (PDLCs), which are composed of micro-sized liquid crystals (LCs) droplets dispersing in a continuous polymer matrix, have been intensively investigated during the past few decades [1][2][3][4][5]. A PDLC film can be switched from a light scattering OFF state to a transparent ON state without polariser and alignment layers.…”

Section: Introductionmentioning

confidence: 99%

Influence of macroinitiator’s glass transition temperature on the response times of polymer dispersed liquid crystals

et al. 2013

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2014) Influence of macroinitiator's glass transition temperature on the response times of polymer dispersed liquid crystals, Liquid Crystals, 41:2, 202-206, Glass transition temperature (T g ), an important parameter of polymer, was reported to have great influence on the electro-optical properties of polymer dispersed liquid crystals (PDLCs). In this study, macroinitiators with different T g were synthesised by reversible addition fragmentation chain transfer polymerisation, and used to prepare PDLCs with different T g block chains. The effect of different T g of the block chains on response times was investigated. It was found that rise time decreased and decay time increased with the decrease of the block chain's T g . We proposed a possible mechanism by which T g of the block chains influence response times.

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“…They are promising for use as optic shutters, flexible display devices, smart windows and optical sensors. [2][3][4][5][6] Several methods have been applied to form PDLCs, mainly involving thermally induced phase separation, solvent-induced phase separation and polymerisationinduced phase separation (PIPS). [7] The PIPS is the most convenient method to prepare PDLCs with good EO properties, stability, uniformity and reproducibility up to now.…”

Section: Introductionmentioning

confidence: 99%

Effect of rGO on polymer-dispersed liquid crystal fabricated by RAFT polymerisation

Zhang

Shao

et al. 2015

Liquid Crystals

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In this study, we demonstrated that doping polymer matrix with a small amount of reduced graphene oxide (rGO) component (0.05-0.2%) had significant influence on the polymerisation kinetics and electro-optical performances of polymer-dispersed liquid crystal films (PDLCs) fabricated with macro reversible addition-fragmentation chain transfer agents. The effects of rGO content were studied in terms of morphology, compound viscosity, polymer conductivity, polymerisation kinetics and driving voltage of PDLCs. The results exhibited that higher rGO content increased the compound viscosity and the entire process proceeded slowly. Furthermore, the addition of rGO increased the polymer conductivity and local electric field, and reduced the saturation voltage as well as the threshold voltage from 27.3 to 19.5 V and 13.2 to 6.41 V, respectively.

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Studies on electro-optical properties of polymer dispersed liquid crystal films based on epoxy resins prepared by UV-initiated cationic polymerisation

Cited by 16 publications

References 22 publications

Silicon nanostructure-doped polymer/nematic liquid crystal composites for low voltage-driven smart windows

Silicon nanostructure-doped polymer/nematic liquid crystal composites for low voltage-driven smart windows

Influence of macroinitiator’s glass transition temperature on the response times of polymer dispersed liquid crystals

Effect of rGO on polymer-dispersed liquid crystal fabricated by RAFT polymerisation

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