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Thematische Bibliographien / Polymerized liquid crystals

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Konferenzberichte

Auswahl der wissenschaftlichen Literatur zum Thema „Polymerized liquid crystals“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Polymerized liquid crystals"

1

Anderson, David M., und Pelle Ström. „Polymerized lyotropic liquid crystals as contact lens materials“. Physica A: Statistical Mechanics and its Applications 176, Nr. 1 (August 1991): 151–67. http://dx.doi.org/10.1016/0378-4371(91)90438-i.

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Saadat, Younes, Kyungtae Kim und Reza Foudazi. „Initiator-dependent kinetics of lyotropic liquid crystal-templated thermal polymerization“. Polymer Chemistry 12, Nr. 15 (2021): 2236–52. http://dx.doi.org/10.1039/d1py00127b.

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3

Seo, Hyeon Jin, Sang Seok Lee, Jieun Noh, Jae-Won Ka, Jong Chan Won, Cheolmin Park, Shin-Hyun Kim und Yun Ho Kim. „Robust photonic microparticles comprising cholesteric liquid crystals for anti-forgery materials“. Journal of Materials Chemistry C 5, Nr. 30 (2017): 7567–73. http://dx.doi.org/10.1039/c7tc02660a.

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4

Xu, Xiaowan, Yanjun Liu und Dan Luo. „Flexible blue phase liquid crystal film with high stability based on polymerized liquid crystals“. Liquid Crystals 47, Nr. 3 (18.08.2019): 399–403. http://dx.doi.org/10.1080/02678292.2019.1655170.

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5

Miyazawa, K., Y. Kuwasaki, A. Obayashi und M. Kuwabara. „C60 Nanowhiskers Formed by the Liquid–liquid Interfacial Precipitation Method“. Journal of Materials Research 17, Nr. 1 (Januar 2002): 83–88. http://dx.doi.org/10.1557/jmr.2002.0014.

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Fine needlelike crystals of C60 have been formed by a liquid–liquid interfacial precipitation method which uses an interface of the concentrated toluene solution of C60/isopropyl alcohol. The needlelike crystals of C60 with a diameter of submicrons (“C60 nanowhiskers”) were found to be single crystalline and composed of thin slabswith a thickness of about 10 nm. The intermolecular distance of the C60 nanowhiskerswas found to be shortened along the growth axis as compared with the pristine C60crystals, indicating a formation of strong bonding between C60 molecules. TheC60 nanowhiskers are assumed to be polymerized via the “2 + 2” cycloaddition inthe close-packed [110]c direction.

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6

Watanabe, Ryoichi, Toshiki Nakano, Taketoshi Satoh, Hitoshi Hatoh und Yoshimichi Ohki. „Plasma-Polymerized Films as Orientating Layers for Liquid Crystals“. Japanese Journal of Applied Physics 26, Part 1, No. 3 (20.03.1987): 373–76. http://dx.doi.org/10.1143/jjap.26.373.

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7

Kajkowska, Marta, Miłosz Chychłowski und Piotr Lesiak. „Influence of photopolymerization on propagation properties of photonic crystal fiber infiltrated with liquid crystal mixture“. Photonics Letters of Poland 14, Nr. 3 (30.09.2022): 68. http://dx.doi.org/10.4302/plp.v14i3.1166.

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In this paper we analyze the influence of the photopolymerization process on propagation properties of photonic crystal fiber infiltrated with liquid crystal doped with a mixture of reactive monomer and photoinitiator. The obtained results showed changes in photonic band gap of the fiber due to refractive index change of the liquid crystal mixture caused by the polymerization process. Moreover, the research demonstrated the possibility of preserving the desired molecular orientation of liquid crystal initially stabilized by placing the sample in the external electric field. This was achieved by simultaneously irradiating the sample and controlling the orientation of liquid crystal molecules with the electric field. The spectral analysis of the polymerized sample showed no visible difference in propagation spectra when the electric field was turned off after the process was finished. Full Text: PDF ReferencesK. Yin et al., "Advanced liquid crystal devices for augmented reality and virtual reality displays: principles and applications", Light Sci Appl. 11, 161 (2022). CrossRef S. Singh, "Phase transitions in liquid crystals", Phys. Rep. 324, 107 (2000). CrossRef N. Tarjányi, M. Veveričík, D. Káčik, M. Timko, P. Kopčanský, "Birefringence dispersion of 6CHBT liquid crystal determined in VIS-NIR spectral range", Appl. Surf. Sci. 542, 148525 (2021). CrossRef R. Dąbrowski, P. Kula, J. Herman, "High Birefringence Liquid Crystals", Crystals 3, 443 (2013). CrossRef R. H. Self, C. P. Please, T. J. Sluckin, "Deformation of nematic liquid crystals in an electric field", Eur. J. Appl. Math. 13, 1 (2002). CrossRef T. Hegmann, H. Qi, V. M. Marx, "Nanoparticles in Liquid Crystals: Synthesis, Self-Assembly, Defect Formation and Potential Applications", J. Inorg. Organomet. Polym. 17, 483 (2007). CrossRef S. Kaur, S. P. Singh, A. M. Biradar, A. Choudhary, K. Sreenivas, "Enhanced electro-optical properties in gold nanoparticles doped ferroelectric liquid crystals", Appl. Phys. Lett. 91, 023120 (2007). CrossRef I. Dierking, "Polymer Network–Stabilized Liquid Crystals", Adv. Mater. 12, 167 (2000). CrossRef D. C. Hoekstra et al., "Wavelength-Selective Photopolymerization of Hybrid Acrylate-Oxetane Liquid Crystals", Angew. Chem. Int. Ed. 60, 10935 (2021). CrossRef Z. Ge, S. Gauza, M. Jiao, H. Xianyu, S.-T. Wu, "Electro-optics of polymer-stabilized blue phase liquid crystal displays", Appl. Phys. Lett. 94, 101104 (2009). CrossRef M. S. Chychłowski et al., "Locally-induced permanent birefringence by polymer-stabilization of liquid crystal in cells and photonic crystal fibers", Opto-electron. Rev. 26, 242 (2018). CrossRef R. Dąbrowski, J. Dziaduszek, T. Szczuciński, "Mesomorphic Characteristics of Some New Homologous Series with the Isothiocyanato Terminal Group", Mol. Cryst. Liq. Cryst. 124, 241 (1985). CrossRef

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8

Luo, Jingqi, Jinmin Lu, Dongyu Zhao, Xinyu Du, Xiaozhi He und Fanbao Meng. „Imidazolium-based polymerized ionic liquid crystals containing fluorinated cholesteryl mesogens“. Polymers for Advanced Technologies 27, Nr. 3 (03.09.2015): 290–302. http://dx.doi.org/10.1002/pat.3634.

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9

Park, Min-Seok, Kitae Kim, Young-Joo Lee, Jun-Hee Na und Se-Um Kim. „Deformable Photonic Crystals Based on Chiral Liquid Crystals with Thermal-Mediative Shape Memory Effect“. Materials 16, Nr. 1 (21.12.2022): 35. http://dx.doi.org/10.3390/ma16010035.

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We propose a deformable photonic crystal that exhibits the thermal-mediative shape memory effect. The chiral liquid crystalline polymeric scaffold, which produces the structural colors from a helical twist of the liquid crystal director, is prepared through phase-stabilization of a reactive mesogen in a small molecular chiral liquid crystal (CLC), polymerization, and removal of the CLC. The prepolymer of polyurethane acrylate (PUA) is then infiltrated in the prepared scaffold and subsequently photo-polymerized to form a CLC-PUA composite film. Upon compression, this film shows the blue shift of the structural color and retains this color-shift as released from compression. As the temperature increases, the color is recovered to a pristine state. The concept proposed in this study will be useful for designing mechanochromic soft materials.

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10

Kuriakose, Naveen, Pallavi Bapat, Harriet Lindsay und John Texter. „Reversible Colloidal Crystallization“. MRS Advances 5, Nr. 40-41 (2020): 2111–19. http://dx.doi.org/10.1557/adv.2020.286.

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AbstractWe report 3D colloidal self-assembly (crystallization) of poly(ionic liquid) latexes to produce crystals that exhibit reversible melting and recrystallization in water, due to “classical” interparticle interactions, typical of multifunctional polymers. These new materials are derived from an ionic liquid monomer that is polymerized at room temperature by redox-initiated polymerization. Particle synthesis, self-assembly, thermal properties, and introductory light diffraction effects are reported with a focus on melting. These crystals are distinguishable from classical colloidal crystalline arrays, and are the first such crystals to exhibit thermal melting. This new hydrogel offers promise for engineering large volume production of photonic crystals active in the visible and proximal spectral regions, by crystallization from suspension (solution), characteristic of most useful chemical compounds.

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Buchteile zum Thema "Polymerized liquid crystals"

1

van der Pol, J. F., E. Neeleman, R. J. M. Nolte, J. W. Zwikker und W. Drenth. „Polymerized Discotic Liquid Crystals“. In Integration of Fundamental Polymer Science and Technology—4, 215–19. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0767-6_25.

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2

Lee, Chuan-Pei, und Kuo-Chuan Ho. „CHAPTER 18. Ionic Liquid-based Polymers and Crystals for Dye-sensitized Solar Cells“. In Polymerized Ionic Liquids, 515–30. Cambridge: Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010535-00515.

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Konferenzberichte zum Thema "Polymerized liquid crystals"

1

Teperek, Andrzej, Wojciech Czajkowski und Wojciech Fabianowski. „PDLC optical displays with LC encapsulated in polymerized vesicles“. In Liquid Crystals: Materials Science and Applications, herausgegeben von Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.215574.

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2

Watanabe, R., T. Nakano und Y. Ohki. „Plasma polymerized films as orientating layers for liquid crystals“. In Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1986. IEEE, 1986. http://dx.doi.org/10.1109/ceidp.1986.7726433.

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3

Mohammadimasoudi, Mohammad, Jeroen Beeckman und Kristiaan Neyts. „Effect of UV curing conditions on polymerized tunable chiral nematic liquid crystals“. In SPIE Organic Photonics + Electronics, herausgegeben von Iam Choon Khoo. SPIE, 2014. http://dx.doi.org/10.1117/12.2060965.

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4

Sato, Hiromasa, Hiroki Hotaka, Tomoki Gunjima, Yuzuru Tanabe und Masahiro Hirano. „Grating Polarizing Beam-Splitter using Polymerized Liquid crystal“. In Symposium on Optical Memory. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/isom.1996.opd.3.

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With a progress in optical disk memory devices that have such as writable function and higher memory density, the efficient use of laser output power is strongly required, specially for DVD. One of the most practical solution for this is to implement a polarized beam splitter in optical pick-up modules. Conventional device once used in early stage of commercialization, which utilizes evaporated multi-layer thin films on a glass prism is hard to use commercially due to its large volume, heavy weight and high cost. Thus, development for new type of polarized beam splitter devices using birefringence material become very active recently 1),2). We have fabricated "Grating type Polarized Beam Splitter" (GPBS) using fine patterned photo-polymerized liquid crystal. Because of its high performance together with inherent nature of low cost and compact size, it has a large potential to be used in optical pick-ups for the advanced optical disk memory devices.

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Wellinghoff, S. T., D. P. Nicolella, D. P. Hanson, H. R. Rawls und B. K. Norling. „Photopolymerizable Liquid Crystal Monomer-Oxide Nanoparticle Composites“. In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39367.

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Methacrylate and acrylate terminated monomers can be rapidly polymerized to polymer glasses useful in biomaterials, photolithography and rapid prototyping, optical coatings and composites. Unfortunately, polymerization shrinkage results in loss of tolerance and the development of internal stresses which can be especially critical in the case of highly crosslinked glasses. Structurally complicated oligomeric mixes of dimethacrylate monomers that exhibit a nematic liquid crystal to isotropic transition above room temperature have been synthesized in a low cost one pot synthesis to surmount the problem of polymerization shrinkage and the propensity of single component monomers to crystallize from the liquid state. Photopolymerization from the ordered liquid crystal state into a less ordered glass minimizes volumetric shrinkages to between 1–2% at greater than 90% polymerization conversion. These polymer glasses exhibited elastic bending moduli of 1.2 GPa to 1.5GPa, fracture strengths of 70–100MPa and fracture toughness of K=0.3–0.4 (MPa)1/2. In some cases the glasses exhibited ductile behavior which is unusual for highly crosslinked materials. Room temperature viscosities of 100P–2000P permit facile processing of the liquid crystal monomers with inorganic particles to make dental restorative composites.

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