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

Deniz Işınsu AVŞAR, (Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü, Ankara, Türkiye)
Emre BÜKÜŞOĞLU (Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü, Ankara, Türkiye)
Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi
1 0
Yıl: 2021 Cilt: 37 Sayı: 1 Sayfa Aralığı: 26 - 35 Metin Dili: İngilizce İndeks Tarihi: 18-10-2021

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

Öz:
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.
Anahtar Kelime:

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

Öz:
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.
Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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APA AVŞAR D, Bukusoglu E (2021). Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. , 26 - 35.
Chicago AVŞAR DENİZ IŞINSU,Bukusoglu Emre Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. (2021): 26 - 35.
MLA AVŞAR DENİZ IŞINSU,Bukusoglu Emre Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. , 2021, ss.26 - 35.
AMA AVŞAR D,Bukusoglu E Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. . 2021; 26 - 35.
Vancouver AVŞAR D,Bukusoglu E Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. . 2021; 26 - 35.
IEEE AVŞAR D,Bukusoglu E "Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates." , ss.26 - 35, 2021.
ISNAD AVŞAR, DENİZ IŞINSU - Bukusoglu, Emre. "Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates". (2021), 26-35.
APA AVŞAR D, Bukusoglu E (2021). Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 37(1), 26 - 35.
Chicago AVŞAR DENİZ IŞINSU,Bukusoglu Emre Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi 37, no.1 (2021): 26 - 35.
MLA AVŞAR DENİZ IŞINSU,Bukusoglu Emre Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi, vol.37, no.1, 2021, ss.26 - 35.
AMA AVŞAR D,Bukusoglu E Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi. 2021; 37(1): 26 - 35.
Vancouver AVŞAR D,Bukusoglu E Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi. 2021; 37(1): 26 - 35.
IEEE AVŞAR D,Bukusoglu E "Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates." Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 37, ss.26 - 35, 2021.
ISNAD AVŞAR, DENİZ IŞINSU - Bukusoglu, Emre. "Shape Effects on the Structure and Response of the Polymeric Particles Synthesized from Cholesteric Liquid Crystal Templates". Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi 37/1 (2021), 26-35.
Sayfa Oluşturulma Tarihi
23-04-2024 19:44

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