Full permanent memory effect in PDLC films

Rafaela Santos; Maria Catarina Silva; Ana Mouquinho; João Carlos da Silva Barbosa Sotomayor

doi:10.1080/15421406.2015.1030199

Full permanent memory effect in PDLC films

Rafaela Santos, Maria Catarina Silva, Ana Mouquinho, João Carlos da Silva Barbosa Sotomayor

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Permanent memory effect in polymer dispersed liquid crystal (PDLC) films prepared by thermal polymerization induced phase separation (PIPS) were studied. New trimethylolpropane trimethacrylate (TMP3MA)/poly(propylene glycol) methacrylate (PPGMA375)/E7/AIBN and pentaerythritol tetraacrylate (PE4A)/poly(propylene glycol) acrylate (PPGA475)/E7/AIBN PDLC films showed 86% permanent memory effect with E90 = 6 V/mu m and memory state contrast of 70% and full permanent memory effect with E90 = 3 V/mu m and total memory state contrast, respectively. These materials with two stable states (opaque and transparent) seem to be promising for the development of a new class of optical memories as they can be used for electrically write information, optically read the written information and they can be thermally erased back to the initial scattered state.

Original language	English
Pages (from-to)	123-131
Number of pages	9
Journal	Molecular Crystals And Liquid Crystals
Volume	611
Issue number	1(SI)
DOIs	https://doi.org/10.1080/15421406.2015.1030199
Publication status	Published - 13 Apr 2015
Event	25th International Liquid Crystal Conference - Dublin, Ireland Duration: 29 Jun 2014 → 4 Jul 2014 Conference number: 25th

Keywords

anchorage force
information storage
PDLC
permanent memory effect
polymeric network

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Cite this

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title = "Full permanent memory effect in PDLC films",

abstract = "Permanent memory effect in polymer dispersed liquid crystal (PDLC) films prepared by thermal polymerization induced phase separation (PIPS) were studied. New trimethylolpropane trimethacrylate (TMP3MA)/poly(propylene glycol) methacrylate (PPGMA375)/E7/AIBN and pentaerythritol tetraacrylate (PE4A)/poly(propylene glycol) acrylate (PPGA475)/E7/AIBN PDLC films showed 86% permanent memory effect with E90 = 6 V/mu m and memory state contrast of 70% and full permanent memory effect with E90 = 3 V/mu m and total memory state contrast, respectively. These materials with two stable states (opaque and transparent) seem to be promising for the development of a new class of optical memories as they can be used for electrically write information, optically read the written information and they can be thermally erased back to the initial scattered state.",

keywords = "anchorage force, information storage , PDLC, permanent memory effect , polymeric network",

author = "Rafaela Santos and Silva, {Maria Catarina} and Ana Mouquinho and Sotomayor, {Jo{\~a}o Carlos da Silva Barbosa}",

note = "Sem PDF; 25th International Liquid Crystal Conference ; Conference date: 29-06-2014 Through 04-07-2014",

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doi = "10.1080/15421406.2015.1030199",

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TY - JOUR

T1 - Full permanent memory effect in PDLC films

AU - Santos, Rafaela

AU - Silva, Maria Catarina

AU - Mouquinho, Ana

AU - Sotomayor, João Carlos da Silva Barbosa

N1 - Conference code: 25th

PY - 2015/4/13

Y1 - 2015/4/13

N2 - Permanent memory effect in polymer dispersed liquid crystal (PDLC) films prepared by thermal polymerization induced phase separation (PIPS) were studied. New trimethylolpropane trimethacrylate (TMP3MA)/poly(propylene glycol) methacrylate (PPGMA375)/E7/AIBN and pentaerythritol tetraacrylate (PE4A)/poly(propylene glycol) acrylate (PPGA475)/E7/AIBN PDLC films showed 86% permanent memory effect with E90 = 6 V/mu m and memory state contrast of 70% and full permanent memory effect with E90 = 3 V/mu m and total memory state contrast, respectively. These materials with two stable states (opaque and transparent) seem to be promising for the development of a new class of optical memories as they can be used for electrically write information, optically read the written information and they can be thermally erased back to the initial scattered state.

AB - Permanent memory effect in polymer dispersed liquid crystal (PDLC) films prepared by thermal polymerization induced phase separation (PIPS) were studied. New trimethylolpropane trimethacrylate (TMP3MA)/poly(propylene glycol) methacrylate (PPGMA375)/E7/AIBN and pentaerythritol tetraacrylate (PE4A)/poly(propylene glycol) acrylate (PPGA475)/E7/AIBN PDLC films showed 86% permanent memory effect with E90 = 6 V/mu m and memory state contrast of 70% and full permanent memory effect with E90 = 3 V/mu m and total memory state contrast, respectively. These materials with two stable states (opaque and transparent) seem to be promising for the development of a new class of optical memories as they can be used for electrically write information, optically read the written information and they can be thermally erased back to the initial scattered state.

KW - anchorage force

KW - information storage

KW - PDLC

KW - permanent memory effect

KW - polymeric network

U2 - 10.1080/15421406.2015.1030199

DO - 10.1080/15421406.2015.1030199

M3 - Article

SN - 1058-725X

VL - 611

SP - 123

EP - 131

JO - Molecular Crystals And Liquid Crystals

JF - Molecular Crystals And Liquid Crystals

IS - 1(SI)

T2 - 25th International Liquid Crystal Conference

Y2 - 29 June 2014 through 4 July 2014

ER -

Full permanent memory effect in PDLC films

Abstract

Keywords

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