E7 nematic liquid crystal encapsulated in a polymeric photonic crystal

Rusen, Edina; Diacon, Aurel; Mitran, Raul−Augustin; Dinescu, Adrian; Nistor, Cristina Lavinia; Şomoghi, Raluca; Boscornea, Aurelian Cristian; Mănăilă-Maximean, Doina

doi:10.1016/j.eurpolymj.2022.111374

Cited by 9 publications

(4 citation statements)

References 56 publications

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“…3), the dimensions of the assembles formed were 1144 nm with a Zeta potential of À28.7 mV. Based on previous reports of our team, 26,[31][32][33][34] for the ST-AA system, the polymer particle dimensions are in the 200-250 nm range for polymerization without MXenes. Thus, the DLS data presents the dimensions of the MXenes polymer colloid aggregates that were identified as polymer colloids bound to the 2D MXenes platelets.…”

Section: Resultsmentioning

confidence: 57%

MXenes and polymeric colloids nanocomposites for EMI shielding

Rusen,

Mocanu,

Brincoveanu

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 57%

MXenes and polymeric colloids nanocomposites for EMI shielding

Rusen,

Mocanu,

Brincoveanu

et al. 2024

J. Mater. Chem. C

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“…Edina et al studied the synthesis and characterization of nano-encapsulated LCs in a polymer (nanoELCP) obtained by soap-free emulsion polymerization of the system sty-rene (ST) and acrylic acid (AA) in the presence of the LC E7 [40]. TGA analyses were per-formed to quantify the amount of E7 encapsulated in the polymer particles [41].…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation Studies of Poly(2-ethyl hexyl acrylate) in the Presence of Nematic Liquid Crystals

Bouriche,

Alachaher-Bedjaoui,

Barrera

et al. 2023

Polymers

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The thermal degradation behavior of Poly(2-ethyl hexyl hcrylate) (Poly(2-EHA)), blended with a commercially available nematic liquid crystal (LC) mixture, was investigated by thermal gravimetric analysis (TGA). Different heating rates, ranging from 5 to 200 °C/min, were applied under an inert atmosphere. Based on the TGA results, activation energies (Eα) at different conversion rates (α) were determined using three integral isoconversion methods: Flynn-Wall-Ozawa (FWO), Tang, and Kissinger-Akahira-Sunose (KAS). It can be noticed that the global evolution of these activation energies was the same for the three models. The coefficient of determination R2 presented values generally higher than 0.97. Using these models, the Eα value for the LC remains constant at 64 kJ/mol for all conversions rates. For the polymer Poly(2-EHA), applying the Tang and FWO models, the activation energy presents a variation ranging from 80 kJ/mol, for conversion α = 0.1, to 170 kJ/mol, for α = 0.9. For the third model (KAS), this energy varies between 80 and 220 kJ/mol in the same range of α.

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“…The modern trends in the development of light-sensitive media for holography applications are presented in a review article by Barachevsky [37]. Other type of hybrid organic/inorganic (or nanocomposite) materials include polymer-dispersed liquid crystal (PDLC) materials or liquid crystals doped with nanoparticles of photosensitive polymers, which have been intensively studied by many research groups [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. However, PDLCs are outside the scope of the present review, as they cover a very wide area of research that requires a separate consideration and analysis.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Nazarova,

Nedelchev,

Berberova-Buhova

et al. 2023

Nanomaterials

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Photoanisotropic materials, in particular azodyes and azopolymers, have attracted significant research interest in the last decades. This is due to their applications in polarization holography and 4G optics, enabling polarization-selective diffractive optical elements with unique properties, including circular polarization beam-splitters, polarization-selective bifocal lenses, and many others. Numerous methods have been applied to increase the photoinduced birefringence of these materials, and as a result, to obtain polarization holographic elements with a high diffraction efficiency. Recently, a new approach has emerged that has been extensively studied by many research groups, namely doping azobenzene-containing materials with nanoparticles with various compositions, sizes, and morphologies. The resulting nanocomposites have shown significant enhancement in their photoanisotropic response, including increased photoinduced birefringence, leading to a higher diffraction efficiency and a larger surface relief modulation in the case of polarization holographic recordings. This review aims to cover the most important achievements in this new but fast-growing field of research and to present an extensive comparative analysis of the result, reported by many research groups during the last two decades. Different hypotheses to explain the mechanism of photoanisotropy enhancement in these nanocomposites are also discussed. Finally, we present our vision for the future development of this scientific field and outline its potential applications in advanced photonics technologies.

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E7 nematic liquid crystal encapsulated in a polymeric photonic crystal

Cited by 9 publications

References 56 publications

MXenes and polymeric colloids nanocomposites for EMI shielding

MXenes and polymeric colloids nanocomposites for EMI shielding

Thermal Degradation Studies of Poly(2-ethyl hexyl acrylate) in the Presence of Nematic Liquid Crystals

Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

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