Fabrication of dye-doped polymer-dispersed liquid crystals with low driving voltage based on nucleophile-initiated thiol-ene click reaction

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

“…However, the latter employs a base or a nucleophile which could weaken the bond energy of the alkene double bond to start the reaction in mild conditions. In China, Wang et al [55][56][57][58] from Sichuan university, in their various studies, employed the thiol-Michael addition to produce dye-doped PDLC films with low driving voltage (Vdr). In our group Zhong et al [16] employed vinyl ether and thiol to fabricate PDLCs via the [48,49] PDLC films composed of thiol-ene monomers are usually prepared by UV-polymerization.…”

Acrylate-assisted fractal nanostructured polymer dispersed liquid crystal droplet based vibrant colored smart-windows

“…The PDLCs mixture based on thiolene click chemistry leads to the good dispersibility between the constituents resulting in the formation of uniform polymerized networks. 13,14 Such thiol-ene based systems, in addition to smart windows, can also be used in holographic PDLCs reection grating. 8 The thiol-ene based polymerizations are not inhibited by oxygen, which eliminates the need to add photoinitiators.…”

“…Shi et al have attempted the dye-doped PDLCs with thiol-ene systems with good switching and low driving voltage, however, the colored appearance was not observed in the OFF state. 22 The colorful PDLCs can be obtained by adding various types of dyes, such as azo as well as anthraquinone. It has been observed that the contrast ratio of a PDLC is improved with the addition of dye.…”

Comparative studies of polymer‐dispersed liquid crystal films via a thiol‐ene click reaction

“…The thiol‐ene click reaction is the hydrothiolation of a C═C bond, defined by Kolb et al, and has often conducted via the dissociation of a photoinitiator into a radical species . Moreover, the thiol‐ene click reaction has simplicity, robustness, and fast reaction speed in the field of polymer and materials chemistry . The reactivity in the radical thiol‐ene reaction can vary considerably depending on the chemical structure of the ‐ene and thiol components and the ‐ene reactivity with alkyl 3‐mercaptopropionates, alkyl thioglycolates, and alkyl thiols under radical conditions, following the order: vinyl ether > allyl ether > acrylate .…”

“…39,40 Moreover, the thiol-ene click reaction has simplicity, robustness, and fast reaction speed in the field of polymer and materials chemistry. [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] The reactivity in the radical thiol-ene reaction can vary considerably depending on the chemical structure of the -ene and thiol components and theene reactivity with alkyl 3-mercaptopropionates, alkyl thioglycolates, and alkyl thiols under radical conditions, following the order: vinyl ether > allyl ether > acrylate. 40 Herein, we employed the thiol-ene click reaction between the vinyl ether and thiol to fabricate PDLC…”