PECULIARITIES OF THE FORMATION OF A MICROSTRUCTURE OF BOROSILOXANE LIQUID CRYSTAL COMPOSITES
https://doi.org/ 10.18384/2310-7251-2017-2-34-45.
Abstract
Using the methods of optical polarization microscopy, spectrophotometry and refractometry, we study the microstructure and optical properties of liquid crystal composites (LC composites) based on borosiloxane and LCD-1282 nematic liquid crystal that have been obtained for the first time. In the uniaxial stretching of composites, a new phenomenon in the formation of borosiloxane of microfilaments of liquid crystals in a matrix up to several centimeters in length is observed. The formation of microfilaments and their spontaneous destruction with the formation of microdroplets of liquid crystals are experimental and theoretically characterized. The model of observed processes and an analytical expression relating the length and radius of the formed filament with the size of the droplets formed during its destruction are proposed and experimentally confirmed. Materials based on the investigated LC composites can be used in display technology and optoelectronics, for example, as microresonators and electron-optical sensors.
About the Authors
Vladimir I. Mashchenko
Moscow Region State University
Russian Federation
Russian Federation
Julia O. Shashkova
Moscow Region State University
Russian Federation
Russian Federation
Aleksei S. Solomatin
Moscow Region State University
Russian Federation
Russian Federation
Victor V. Belyaev
Moscow Region State University
Russian Federation
Russian Federation
References
1. Жаркова Г.М., Сонин А.С. Жидкокристаллические композиты. Новосибирск: Наука, 1994. 214 c.
2. Беляев В.В. Дисплеи 90-х годов. М.: Химия, 2000. 91 с.
3. Parab S.S., Malik M.K., Deshmukh R.R. Dielectric relaxation and electro-optical switching behavior of nematic liquid crystal dispersed in poly(methyl methacrylate) // Journal of Non-Crystalline Solids. 2012. V. 358. № 18-19. P. 2713-2722.
4. Su Y.-C., Chu C.-C., Chang W.-T., Hsiao V.K.S. Characterization of optically switchable holographic polymer-dispersed liquid crystal transmission gratings // Optical Materials. 2011. V. 34. № 1. P. 251-255.
5. Deshmukh R.R., Malik M.K. Effect of dichroic dye on phase separation kinetics and electro-optical characteristics of polymer dispersed liquid crystals // Journal of Physics and Chemistry of Solids. 2013. V. 74. № 2. P. 215-224.
6. Ralesh K., Kikuchi H., Stark M., Guckenberger R., Kajiyama T. Morphology and Interface of Liquid Crystal / Polymer Composite System at Nano Scale: A Model Investigation // Mol. Cryst. Liq. Cryst. 1999. V. 329. P. 171-180.
7. Безбородов В.С., Лапаник В.И. Жидкокристаллические соединения с высоким значением положительной диэлектрической анизотропии // Труды БГТУ (Белорусский государственный технологический ун-т). IV. Химия, технология органических веществ и биотехнология, Минск, 2009. Вып. XVII. С. 8-13.
8. Luminita M., Popescua M.-C., Zabulicaa A., Hiroshi Uji-I, Fron E. Chitosan as matrix for bio-polymer dispersed liquid crystal systems // Carbohydrate Polymers 95., 2013. P. 16-24.
9. Luminita M., Ailincai D., Paslaru Е. Monodisperse PDLC composites generated by use of polyvinyl alcohol boric acid as matrix // RSC Adv. 2014. 4. P. 38397-38404.
10. Мащенко В.И., Алексеев А.Н., Картавенко Т.В., Оленин А.В. Патент, РФ, №2473216 // Способ получения масс для лепки с биоцидными свойствами.
11. Беляев В.В., Мащенко В.И., Соломатин А.С., Чаусов Д.Н. Заявка на патент РФ № 2015107901 от 10.03.2015 // Способ получения смеси жидкого кристалла с полимером для дисплейной техники и оптоэлектроники.
12. Bedjaoui L., Benmouna M., Maschke U., Thermophysical analysis of polysiloxane and nematic liquid crystal mixture. Physical Chemical News 49 121-124 (2009).
13. Bedjaouia L., Gogibusb N., Ewenb B., Pakulab T., Coqueretc X., Benmounaa M., Maschkec U. // Preferential solvation of the eutectic mixture of liquid crystals E7 in a polysiloxane// Polymer. V. 45. 2004. P. 6555-6560.
14. Lekkerkerker, H.W., Verhoef1 A.A. Droplet snap-off in fluids with nematic liquid crystalline ordering // New Journal of Physics. 2012. 14. 12 p.
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