Journals / Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2021 / Cilt: 37 - Sayı: 1

Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates

Kolesterik Sıvı Kristal Şablonları ile Sentezlenmiş Polimerik Parçacıkların Şekillerinin Yapıları ve Tepkileri Üzerine Etkisi

Pages
26–35
Publication Date
2022-10-18
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The findings of this study will be used in the design of responsive polymeric particles used in the sensing of the vapors of volatile organic compounds.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Liquid crystals (LCs) have been shown to provide molecular templates for the synthesis of polymeric particles.
📊
Key Findings & Data:Past studies have revealed the elastic effects to dominate internal configuration of the LC molecular templates for the sizes below 10 μm.
💡
Conclusion & Impact:The findings of this study will be used in the design of responsive polymeric particles used in the sensing of the vapors of volatile organic compounds.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Liquid crystals (LCs) have been shown to provide molecular templates for the synthesis of polymeric particles. Past studies have revealed the elastic effects to dominate internal configuration of the LC molecular templates for the sizes below 10 μm. Sacrificial microwells were used in this study to study the effect of shapes of the particles synthesized from the cholesteric liquid crystals on their structure and response. Specifically, mixtures of diacrylate based reactive (RM257) and non-reactive mesogens (E7), and chiral dopant (S811) were initially filled into circular, triangular, square and star shaped microwells made from polyvinyl alcohol. After photopolymerization followed by the extraction of the non-reactive part, the particles were obtained. Optical and responsive characterization of the particles showed that the elastic effects of the liquid crystals can also be observed within the particles of the sizes of 50 μm, significantly above the usually expected sizes. We found that the three-dimensional confinement, inhomogeneous surface anchoring and the cholesteric symmetry to play a critical role in the dominant effect of elasticity at larger sizes. The findings of this study will be used in the design of responsive polymeric particles used in the sensing of the vapors of volatile organic compounds.

Özet

Sıvı kristal moleküler şablonları polimerik parçacıkların sentezine olanak sağlamaktadır. Geçmiş çalışmalar sıvı kristal elastik etkilerinin 10 μm boyutlarından küçük boyutlardaki parçacıkların içsel organizasyonlarına kritik rol oynadığını göstermiştir. Bu çalışmada mikrokuyucuk yöntemi kullanılarak kolesterik şablonlu sentezlenen parçacıkların şekilleri üzerinde hakimiyet sağlanmış, yapıları ve tepkisellikleri incelenmiştir. Diakrilat gruplu reaktif (RM257) mezojenler, reaktif olmayan (E7) mezojenler ve kiral katkı maddesi (S811) karışımları öncelikle yuvarlak, üçgen, kare ve yıldız şeklindeki polivinil alkol mikrokuyucuklara doldurulmuştur. Fotopolimerizasyon ve takip eden ekstraksiyon sonucunda polimerik parçacıklar elde edilmiştir. Parçacıkların optik ve tepki karakteristikleri incelendiğinde sıvı kristal elastik enerjilerinden kaynaklı düzenlerin 50 μm boyutlarında, daha önceki çalışmalarda gözlemlenen boyutlardan daha büyük boyutlarda, etkili olduğu gözlemlenmiştir. Üç boyutlu sıkıştırılmış ortamın varlığının, homojen olmayan yüzey yöneliminin ve kolesterik düzen simetrisinin bu etkide önemli rol oynadığı bulunmuştur. Bu çalışmanın bulguları sensörler veya tepkisel malzemelerin sentezinde kullanılacak bilgiler içermektedir.

🔖

Cite This Article

AVŞAR, D. I., BÜKÜŞOĞLU, E. (2022). Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 37 - Sayı: 1, 26–35. https://ajindex.com/articles/503218

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (12)

  1. de Gennes, P. G., Prost, J. 1993. The Physics of Liquid Crystals. 2nd edition. Oxford, New York
  2. White, T. J., McConney, M. E., Bunning, T. J. 2010. Dynamic Color in Stimuli-Responsive Cholesteric Liquid Crystals. Journal of Materials Chemistry, 20, 9832–9847, [3] Bukusoglu, E., Bedolla-Pantoja, M. A., Mushenheim, P. C., Wang, X., Abbott, N. L. 2016. Design of Responsive and Active (Soft) Materials Using Liquid Crystals. Annual Review in Chemical and Biomolecular Engineering, 7, 163–196
  3. Bai, Y., Abbott, N. L. 2011. Recent Advances in Colloidal and Interfacial Phenomena Involving Liquid Crystals. Langmuir, 27, 5719–5738
  4. Herzer, N., Guneysu, H., Davies, D. J. D., Yildirim, D., Vaccaro, A. R., Broer, D. J., Bastiaansen, C. W. M., Schenning, A. P. H. J. 2012. Printable Optical Sensors Based on H-bonded Supramolecular Cholesteric Liquid Crystal Networks. Journal of American Chemical Society, 134, 7608–7611
  5. Han, Y., Pacheco, K., Bastiaansen, C. W. M., Broer, D. J., Sijbesma, R. P. 2010. Optical Monitoring of Gases with Cholesteric Liquid Crystals. Journal of American Chemical Society, 132, 2961–2967
  6. Sutarlie, L., Qin, H., Yang, K. L. 2010. Polymer Stabilized Cholesteric Liquid Crystal Arrays for Detecting Vaporous Amines. Analyst, 135, 1691–1696
  7. Iamsaard, S., Aßhoff, S. J., Matt, B., Kudernac, T., Cornelissen, J. J. L. M., Fletcher, S. P., Katsonis, N. 2014. Conversion of Light into Macroscopic Helical Motion. Nature Chemistry, 6, 229–235
  8. Gelebart, A. H., Liu, D., Mulder, D. J., Leunissen, K. H. J., van Gerven, J., Schenning, A. P. H. J., Broer, D. J. 2018. Photoresponsive Sponge-Like Coating for On-Demand Liquid Release. Advanced Functional Materials, 28, 1705942
  9. Kotikian, A., Truby, R. L., Boley, J. W., White, T. J., Lewis, J. A. 2018. 3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order. Advanced Materials, 30, 1–6
  10. Feng, W., Broer, D. J., Liu, D. 2018. Oscillating Chiral-Nematic Fingerprints Wipe Away Dust. Advanced Materials, 1704970, 1704970
  11. White, T. J., Broer, D. J. 2015. Programmable and Adaptive Mechanics with Liquid Crystal Polymer Networks and Elastomers. Nature Materials, 14, 1087–1098
  12. Wang, X., Bukusoglu, E., Miller, D. S., Bedolla-Pantoja, M. A., Xiang, J., Lavrentovich, O. D., Abbott, N. L. 2016. Synthesis of Optically Complex, Porous, and Anisometric Polymeric Microparticles by Templating from Liquid Crystalline Droplets. Advanced Functional Materi