Chemical Characterization and Thermal Analysis of Recovered Liquid Crystals
| Autor: | Ana Barrera, Corinne Binet, Florence Danede, Jean-François Tahon, Baghdad Ouddane, Frédéric Dubois, Philippe Supiot, Corinne Foissac, Ulrich Maschke |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Crystals, Vol 13, Iss 7, p 1064 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2073-4352 57673039 |
| DOI: | 10.3390/cryst13071064 |
| Popis: | Chemical, structural, and thermal properties of recovered nematic Liquid Crystal (LC) mixtures were investigated by applying several analytical techniques. A large quantity (65,700) of End-Of-Life (EOL) Liquid Crystal Display (LCD) screens were used to extract these LC blends. The studied EOL-LCD screens were heterogeneous in nature, particularly due to their different brands, production years, and dimensions. The collected TV and computer screens, as well as tablets, presented an average diagonal size of 24 inches. Chemical characterization revealed that the recovered compounds present typical chemical structures of LC molecules by the simultaneous presence of aliphatic chains and aromatic and polar groups. POM observations of these samples exhibited Schlieren and marble-like textures at room temperature, which are typical of nematic LCs. Moreover, thermal characterization and thermo-optical analysis showed that these LC mixtures displayed a broad nematic phase between −90 °C and +70 °C. |
| Databáze: | Directory of Open Access Journals |
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