Novel pdlc type display based on cellulose derivatives

M. H. Godinho; A. F. Martins; J. L. Figueirinhas

doi:10.1080/02678299608032047

Novel pdlc type display based on cellulose derivatives

M. H. Godinho, A. F. Martins, J. L. Figueirinhas

DCM - Departamento de Ciência dos Materiais

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

36 Citations (Scopus)

Abstract

A novel type of PDLC display utilizing solid films obtained from the cellulose derivative hydroxypropylcellulose (HPC) with molecular weights of 60 000 (HPC60 000) and 100 000 (HPC100 OW), cross-linked with two different di-isocyanates, 1,4-di-isocyanatobutane (BDI) and 1,6-di-isocyanatohexane (HDI), is presented. This kind of display (optical cell) is composed of a porous elastomeric film (20-60pm thick) of HPC-BDI or HPC-HDI, impregnated with a nematic liquid crystal and contained between two transparent conducting substrates. The electro-optic behaviour of several optical cells is studied as a function of film thickness, the molecular weight of the polymer and the cross-linking agent. The preliminary studies presented in this work show that these systems present good contrast, high transmissivity in the on state and switching times in the range of some milliseconds to hundreds of milliseconds.

Original language	English
Pages (from-to)	373-376
Number of pages	4
Journal	Liquid Crystals
Volume	20
Issue number	3
DOIs	https://doi.org/10.1080/02678299608032047
Publication status	Published - 1 Jan 1996

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title = "Novel pdlc type display based on cellulose derivatives",

abstract = "A novel type of PDLC display utilizing solid films obtained from the cellulose derivative hydroxypropylcellulose (HPC) with molecular weights of 60 000 (HPC60 000) and 100 000 (HPC100 OW), cross-linked with two different di-isocyanates, 1,4-di-isocyanatobutane (BDI) and 1,6-di-isocyanatohexane (HDI), is presented. This kind of display (optical cell) is composed of a porous elastomeric film (20-60pm thick) of HPC-BDI or HPC-HDI, impregnated with a nematic liquid crystal and contained between two transparent conducting substrates. The electro-optic behaviour of several optical cells is studied as a function of film thickness, the molecular weight of the polymer and the cross-linking agent. The preliminary studies presented in this work show that these systems present good contrast, high transmissivity in the on state and switching times in the range of some milliseconds to hundreds of milliseconds.",

author = "Godinho, {M. H.} and Martins, {A. F.} and Figueirinhas, {J. L.}",

note = "We acknowledge JNICT for financial support given under projects PBIC/C/CTM/1400/92 and PBIC/C/ CTM/1411/92.",

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T1 - Novel pdlc type display based on cellulose derivatives

AU - Godinho, M. H.

AU - Martins, A. F.

AU - Figueirinhas, J. L.

N1 - We acknowledge JNICT for financial support given under projects PBIC/C/CTM/1400/92 and PBIC/C/ CTM/1411/92.

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Y1 - 1996/1/1

N2 - A novel type of PDLC display utilizing solid films obtained from the cellulose derivative hydroxypropylcellulose (HPC) with molecular weights of 60 000 (HPC60 000) and 100 000 (HPC100 OW), cross-linked with two different di-isocyanates, 1,4-di-isocyanatobutane (BDI) and 1,6-di-isocyanatohexane (HDI), is presented. This kind of display (optical cell) is composed of a porous elastomeric film (20-60pm thick) of HPC-BDI or HPC-HDI, impregnated with a nematic liquid crystal and contained between two transparent conducting substrates. The electro-optic behaviour of several optical cells is studied as a function of film thickness, the molecular weight of the polymer and the cross-linking agent. The preliminary studies presented in this work show that these systems present good contrast, high transmissivity in the on state and switching times in the range of some milliseconds to hundreds of milliseconds.

AB - A novel type of PDLC display utilizing solid films obtained from the cellulose derivative hydroxypropylcellulose (HPC) with molecular weights of 60 000 (HPC60 000) and 100 000 (HPC100 OW), cross-linked with two different di-isocyanates, 1,4-di-isocyanatobutane (BDI) and 1,6-di-isocyanatohexane (HDI), is presented. This kind of display (optical cell) is composed of a porous elastomeric film (20-60pm thick) of HPC-BDI or HPC-HDI, impregnated with a nematic liquid crystal and contained between two transparent conducting substrates. The electro-optic behaviour of several optical cells is studied as a function of film thickness, the molecular weight of the polymer and the cross-linking agent. The preliminary studies presented in this work show that these systems present good contrast, high transmissivity in the on state and switching times in the range of some milliseconds to hundreds of milliseconds.

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EP - 376

JO - Liquid Crystals

JF - Liquid Crystals

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ER -

Novel pdlc type display based on cellulose derivatives

Abstract

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