Water-soluble aromatic polyamide as a low-temperature-processable alignment layer: Poly(2,2 '-disulfo-4,4 '-benzidine isophthalamide) cesium salt
- Authors
- Won, Sang Hee; Kim, Hyeong Wook; Kuzmin, Valery; Kim, Bo Sung; Shin, Sung Tae
- Issue Date
- 3월-2020
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Water-soluble aromatic polyamide; Poly(2,2 ' -disulfo-4,4 ' -benzidine isophthalamide) cesium salt; Alignment layer; Liquid crystal device; Low temperature
- Citation
- PROGRESS IN ORGANIC COATINGS, v.140
- Indexed
- SCIE
SCOPUS
- Journal Title
- PROGRESS IN ORGANIC COATINGS
- Volume
- 140
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/57467
- DOI
- 10.1016/j.porgcoat.2019.105506
- ISSN
- 0300-9440
- Abstract
- A water-soluble aromatic polyamide (WAPA) thin film was formed by coating a newly synthesized poly(2,2'disulfo-4,4'-benzidine isophthalamide) cesium salt (PDBI-Cs). Its electro-optical properties as an alignment layer in liquid crystal devices were analyzed. Twisted nematic-liquid crystal cells containing WAPA alignment layers annealed at a low temperature of 100 degrees C showed high voltage holding ratio values above 95 % at a frame rate of 60 Hz, a fast response time of 7.18 ms at ac operation of 1 kHz under LC-applied voltage of 5 V, and excellent contrast ratio of 3284 due to the high optical anisotropy effect of the WAPA surface. Thus, PDBI-Cs-based WAPA can be a promising candidate as a new eco-friendly low-temperature-processable alignment layer for flexible electro-optic devices.
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Collections - Graduate School > Department of Applied Physics > 1. Journal Articles
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