scholarly journals Rotational Reorganization of Doped Cholesteric Liquid Crystalline Films

2006 ◽  
Vol 128 (44) ◽  
pp. 14397-14407 ◽  
Author(s):  
Rienk Eelkema ◽  
Michael M. Pollard ◽  
Nathalie Katsonis ◽  
Javier Vicario ◽  
Dirk J. Broer ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Films ◽  
Cholesteric Liquid Crystalline

Dual mechanochromism of cellulosic cholesteric liquid-crystalline films: wide-ranging colour control and circular dichroism inversion by mechanical stimulus

2018 ◽  
Vol 6 (6) ◽  
pp. 1370-1376 ◽  
Author(s):  
K. Miyagi ◽  
Y. Teramoto
Keyword(s):  
Circular Dichroism ◽  
Liquid Crystalline ◽  
Colour Change ◽  
Mechanical Stimulus ◽  
Crystalline Films ◽  
Circular Dichroïsm ◽  
Cholesteric Liquid Crystalline

We found that cellulosic liquid-crystalline films displayed not only a wide-ranging colour change but also inversion of circular dichroism upon a mechanical stimulus.

Side-Chain Cholesteric Liquid Crystalline Elastomers Derived from a Mesogenic Cross-Linking Agent

2003 ◽  
Vol 36 (24) ◽  
pp. 9060-9066 ◽  
Author(s):  
Jian-She Hu ◽  
Bao-Yan Zhang ◽  
Ying-Gang Jia ◽  
Song Chen
Keyword(s):  
Liquid Crystalline ◽  
Side Chain ◽  
Cross Linking ◽  
Cholesteric Liquid Crystalline

Highly regioselective surface acetylation of cellulose and shaped cellulose constructs in the gas-phase

2021 ◽  
Author(s):  
Tetyana Koso ◽  
Marco Beaumont ◽  
Blaise Tardy ◽  
Daniel Rico del Cerro ◽  
Samuel Eyley ◽  
...  
Keyword(s):  
Gas Phase ◽  
Liquid Crystalline ◽  
Computational Modelling ◽  
Building Blocks ◽  
Cellulosic Materials ◽  
Gas Phase Chemistry ◽  
Liquid Crystalline Phases ◽  
Phase Chemistry ◽  
Cholesteric Liquid Crystalline ◽  
Surface Acetylation

Gas-phase acylation of cellulose is an attractive method for modifying the surface properties of cellulosics. However, little is known concerning the regioselectivity of the chemistry, in terms of which cellulose positions are preferentially acylated and if acylation can be restricted to the surface, preserving crystallinities/morphologies. Consequently, we reexplore simple gas-phase acetylation of modern-day cellulosic building blocks – cellulose nanocrystals, pulps, regenerated fibre and aerogels. The gas-phase acetylation is shown to be highly regioselective for the C6-OH, is further supported with computational modelling. This contrasts with liquid-state acetylation, highlighting that the gas-phase chemistry is much more controllable, yet with similar kinetics to the uncatalyzed liquid-phase reactions. Furthermore, this method preserves both the native crystalline structure of cellulose and the supramolecular morphologies of even delicate cellulosic constructs (aerogel exhibiting retention of chiral cholesteric liquid crystalline phases). Therefore, we are convinced that this methodology will lead to more rapid adoption of precisely tailored and cellulosic materials

Controlled Fabrication and Photonic Structure of Cholesteric Liquid Crystalline Shells

2014 ◽  
Vol 26 (29) ◽  
pp. 4919-4919 ◽  
Author(s):  
Yoshiaki Uchida ◽  
Yoichi Takanishi ◽  
Jun Yamamoto
Keyword(s):  
Liquid Crystalline ◽  
Photonic Structure ◽  
Cholesteric Liquid Crystalline
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