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Optical and Calorimetrical Studies of Liquid Crystalline Materials Doped with Nanoparticles |
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| Authors: | Malika Elouali Christophe Beyens Fatima Zohra Elouali Oleg Yaroshchuk Boucif Abbar Ulrich Maschke |
| Affiliation: | 1. Unité Matériaux et Transformations (UMET), UMR 8207–CNRS, Bâtiment C6, Université Lille 1- Sciences et Technologies, 59655 Villeneuve d'Ascq Cedex, France Département de Physique, Université Djillali Liabès, 22000 Sidi Bel Abbès, Algeria;2. Unité Matériaux et Transformations (UMET), UMR 8207–CNRS, Bâtiment C6, Université Lille 1- Sciences et Technologies, 59655 Villeneuve d'Ascq Cedex, France;3. Unité Matériaux et Transformations (UMET), UMR 8207–CNRS, Bâtiment C6, Université Lille 1- Sciences et Technologies, 59655 Villeneuve d'Ascq Cedex, France Laboratoire de Recherche sur les Systèmes Biologiques et la Géomatique, Université de Mascara, Route de Mamounia, 29000 Mascara, Algeria;4. Institute of Physics, NASU, prospect Nauki 46, 03680 Kyiv, Ukraine;5. Département de Physique, Université Djillali Liabès, 22000 Sidi Bel Abbès, Algeria |
| Abstract: | Summary: Electro-optical properties of Polymer Dispersed Liquid Crystal (PDLC) films doped with different nanoparticles (NPs), as well as optical and morphological properties of liquid crystal/NP mixtures have been investigated. PDLC films were prepared by UV irradiation of thiol-ene monomers and liquid crystal E7 in the presence of a small amount (0.5 and 1 wt.%) of nanoparticles. The presence of NP strongly influence the properties of liquid crystal/NP mixtures. In particular, adding nanoparticles results in a decrease of the glass and nematic-isotropic transition temperatures of the LC, suggesting that strong interactions occur between LC and nanoparticles. |
| Keywords: | differential scanning calorimetry (DSC) glass transition morphology nanoparticles photopolymerization |