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The Impact of Curing Temperature and UV Light Intensity on the Performance of Polymer-Dispersed Liquid Crystal Devices Exhibiting a Permanent Memory Effect

2024-06-24Review article Open access
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dc.contributor.authorMouquinho, Ana
dc.contributor.authorSotomayor, João
dc.date.accessioned2025-10-30T12:42:26Z
dc.date.available2025-10-30T12:42:26Z
dc.date.issued2024-06-24
dc.description.abstractPDLC films, synthesized via polymerization-induced phase separation (PIPS) utilizing both temperature and UV monochromatic radiation, were derived from a blend of E7 nematic liquid crystal (LC) and PolyEGDMA875 (polyethyleneglycoldimethacrylate) oligomers, serving as the precursor for the polymeric matrix. The influence of the curing temperature on thermal polymerization, UV light intensity on photochemical polymerization, and exposure time during these processes on the electro-optical characteristics of PDLC films was thoroughly examined. Observations revealed that employing thermal polymerization during device preparation notably enhanced the permanent memory effect of the PDLC films. Sustained high transparency (TOFF = 45%) over an extended duration at room temperature, even subsequent to voltage cessation, was achieved. This transition initiated from an opaque state (T0 = 0%) through to a transparent state (TMAX = 65%), resulting in a substantial 70% permanent memory effect.eng
dc.identifier.citationMouquinho, A., & Sotomayor, J. (2024). The Impact of Curing Temperature and UV Light Intensity on the Performance of Polymer-Dispersed Liquid Crystal Devices Exhibiting a Permanent Memory Effect. Crystals, 14(6), 571.
dc.identifier.doi10.3390/cryst14060571
dc.identifier.urihttp://hdl.handle.net/10400.26/59468
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relation.hasversionhttps://www.mdpi.com/2073-4352/14/6/571
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectpolymer-dispersed liquid crystal (PDLC)
dc.subjectliquid crystal
dc.subjectpermanent memory effect
dc.subjectphotochemical polymerization
dc.subjectthermal polymerization
dc.titleThe Impact of Curing Temperature and UV Light Intensity on the Performance of Polymer-Dispersed Liquid Crystal Devices Exhibiting a Permanent Memory Effecteng
dc.typereview article
dspace.entity.typePublication
oaire.citation.issue6
oaire.citation.startPage571
oaire.citation.titleCrystals
oaire.citation.volume14
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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