دورية أكاديمية
Production and Investigation of Cholesteric Liquid Crystal-Polymer Fibers by Electrospinning Method ; Kolesterik Sıvı Kristal - Polimer Liflerinin Elektro-eğirme Yöntemi ile Üretilmesi ve İncelenmesi
| العنوان: | Production and Investigation of Cholesteric Liquid Crystal-Polymer Fibers by Electrospinning Method ; Kolesterik Sıvı Kristal - Polimer Liflerinin Elektro-eğirme Yöntemi ile Üretilmesi ve İncelenmesi |
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| المؤلفون: | KILIÇ, Mervenur, CAN, Mustafa, AVCI, Nejmettin, MAMUK, Atilla Eren |
| المصدر: | Volume: 13, Issue: 4 1661-1680 ; 2564-7377 ; Karadeniz Fen Bilimleri Dergisi ; The Black Sea Journal of Sciences |
| بيانات النشر: | Giresun Üniversitesi Giresun University |
| سنة النشر: | 2023 |
| المجموعة: | DergiPark Akademik (E-Journals) |
| مصطلحات موضوعية: | Cholesteric liquid crystals, electrospinning, fiber, Kolesterik sıvı kristaller, elektro-eğirme, lif, Classical Physics (Other), Klasik Fizik (Diğer) |
| الوصف: | It is well-known that liquid crystals are widely used in applications such as display technology, sensor, elastic circuit component, and light-modulator. Cholesteric liquid crystals come into prominence with their selective transmittance of light. In the study, cholesteric liquid crystals - polymer fiber composites are produced and investigated using single-needle electrospinning for the first time. In this sense, in the beginning, cholesteric liquid crystals with 470 nm, 550 nm, and 640 nm spiral pitches which can reflect blue, green, and red lights, respectively are prepared. It is used E-7 as host nematic mesophase and R 5011 with high twisting power as a chiral dopant material. It was shown by UV-VIS spectrophotometer measurements that the cholesterics have approximately the desired spiral pitch lengths. It is also observed that the the cholesterics have oily-streak patterns, which is a characteristic texture for cholesterics. In addition, the cholesterics are mixed with polyacrylonitrile and the mixture is solved into dimethylformamide. Moreover, liquid crystal-polymer composite fibers are produced by spinning the solutions using single-needle electrospinning under spinning voltages of 16 kV, 18 kV, 20 kV, 22 kV and 24 kV. The existence of liquid crystals inside the fiber is proved by carrying out optical and structural analyses. In the imaging with a polarized optical microscope, irradiances were observed along the fibers between the cross polarizers. These irradiances indicated that liquid crystals have settled along the fiber. Also, it studies on a variance of the fiber structure depending on liquid crystal dopant and production parameters with structural analyses. For the all cholesteric samples, spherical bead structures were detected along the spun fibers at low spinning voltages, while in the fibers at higher spinning voltages the bead structures were observed very rarely. Infrared spectroscopy analysis of the fibers showed the presence of liquid crystals in the fiber structures with peaks at the ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | Turkish |
| العلاقة: | https://dergipark.org.tr/tr/download/article-file/3277828Test; https://dergipark.org.tr/tr/pub/kfbd/issue/81367/1330612Test |
| DOI: | 10.31466/kfbd.1330612 |
| الإتاحة: | https://doi.org/10.31466/kfbd.1330612Test https://dergipark.org.tr/tr/pub/kfbd/issue/81367/1330612Test |
| رقم الانضمام: | edsbas.39F6C48F |
| قاعدة البيانات: | BASE |
| DOI: | 10.31466/kfbd.1330612 |
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