scholarly journals Expanding the upper limits of robustness of cellulose nanocrystal aerogels: outstanding mechanical performance and associated pore compression response of chiral-nematic architectures

2019 ◽  
Vol 7 (25) ◽  
pp. 15309-15319 ◽  
Author(s):  
Anurodh Tripathi ◽  
Blaise L. Tardy ◽  
Saad A. Khan ◽  
Falk Liebner ◽  
Orlando J. Rojas
Keyword(s):  
Liquid Crystal ◽  
Cellulose Nanocrystals ◽  
Mechanical Performance ◽  
Cellulose Nanocrystal ◽  
Chiral Nematic ◽  
Upper Limits

Anisotropy in liquid crystal dispersions of cellulose nanocrystals is demonstrated to drastically enhance the mechanical attributes of derived aerogels.

scholarly journals Concentric chiral nematic polymeric fibers from cellulose nanocrystals

2021 ◽  
Author(s):  
Arash Momeni ◽  
Christopher M. Walters ◽  
Yi-Tao Xu ◽  
Wadood Y. Hamad ◽  
Mark J. MacLachlan
Keyword(s):  
Cellulose Nanocrystals ◽  
Liquid Crystalline ◽  
Capillary Tube ◽  
Single Domain ◽  
Cellulose Nanocrystal ◽  
Polymeric Fibers ◽  
Chiral Nematic ◽  
Chiral Nematic Structure ◽  
Crystalline Suspension

A cellulose nanocrystal liquid crystalline suspension was mixed with monomers and confined to a capillary tube. After photopolymerization, a fiber with a single-domain concentric chiral nematic structure throughout the length of the fiber was obtained.

scholarly journals Unexpected microphase transitions in flow towards nematic order of cellulose nanocrystals

Cellulose ◽  
2019 ◽  
Vol 27 (4) ◽  
pp. 2003-2014 ◽  
Author(s):  
Roland Kádár ◽  
Mina Fazilati ◽  
Tiina Nypelö
Keyword(s):  
Liquid Crystal ◽  
Shear Rate ◽  
Formation Process ◽  
Recovery Time ◽  
Continuous Process ◽  
Cellulose Nanocrystal ◽  
Nematic Order ◽  
Chiral Nematic ◽  
Macro Scale

Abstract Organization of nanoparticles is essential in order to control their light-matter interactions. We present cellulose nanocrystal suspension organization in flow towards a unidirectional state. Visualization of evolving polarization patterns of the cellulose nanocrystal suspensions is combined with steady and oscillatory shear rheology. Elucidation of the chiral nematic mesophase in a continuous process towards unidirectional order enables control of alignment in a suspension precursor for structural films and reveals thus far in situ unrevealed transition states that were not detectable by rheology alone. The coupled analytics enabled the suspensions of interest to be divided into rheological gels and rheological liquid crystal fluids with detailed information on the microtransition phases. Both populations experienced submicron organization and reached macro-scale homogeneity with unidirectional ordering in continued shear. We quantify the time, shear rate, and recovery time after shear to design an optimizing formation process for controlled wet structures as precursors for dry products. Graphic abstract

Nano-to-meso structure of cellulose nanocrystal phases in ethylene–glycol–water mixtures

Soft Matter ◽  
2020 ◽  
Vol 16 (36) ◽  
pp. 8444-8452
Author(s):  
David Attia ◽  
Neta Cohen ◽  
Guy Ochbaum ◽  
Yael Levi-Kalisman ◽  
Ronit Bitton ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Cellulose Nanocrystals ◽  
Liquid Mixture ◽  
Binary Liquid Mixture ◽  
Cellulose Nanocrystal ◽  
Binary Liquid ◽  
Chiral Nematic ◽  
Kinetic Arrest ◽  
Nematic Phases

Vicinal water delays kinetic arrest and enables the assembly of cellulose nanocrystals (CNCs) into chiral nematic phases in a binary liquid mixture of EG–water.

Multifunctional chiral nematic cellulose nanocrystals/glycerol structural colored nanocomposites for intelligent responsive films, photonic inks and iridescent coatings

2018 ◽  
Vol 6 (20) ◽  
pp. 5391-5400 ◽  
Author(s):  
Mingcong Xu ◽  
Wei Li ◽  
Chunhui Ma ◽  
Haipeng Yu ◽  
Yiqiang Wu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Crystal Structures ◽  
Cellulose Nanocrystals ◽  
Structural Features ◽  
Chiral Nematic

Structural colored nanocomposites with photonic liquid crystal structures are desirable owing to their excellent optical performances, unique structural features and intelligent responsive behaviors.

Ultrasonic effect on lyotropic chiral nematic liquid crystal of cellulose nanocrystal

2015 ◽  
Vol 30 (2) ◽  
pp. 229-233 ◽  
Author(s):  
刘思彤 LIU Si-tong ◽  
张大为 ZHANG Da-wei ◽  
朴光哲 PIAO Guang-zhe
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Cellulose Nanocrystal ◽  
Ultrasonic Effect ◽  
Chiral Nematic

Aerogel materials with periodic structures imprinted with cellulose nanocrystals

Nanoscale ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 3805-3812 ◽  
Author(s):  
Yi-Tao Xu ◽  
Yiling Dai ◽  
Thanh-Dinh Nguyen ◽  
Wadood Y. Hamad ◽  
Mark J. MacLachlan
Keyword(s):  
Cellulose Nanocrystals ◽  
Periodic Structures ◽  
Cellulose Nanocrystal ◽  
Chiral Nematic ◽  
Chiral Nematic Structure

Periodic aerogels with a chiral nematic structure were obtained through the solidification of phase-separated cellulose nanocrystal suspensions.

scholarly journals Two helices from one chiral centre – self organization of disc shaped chiral nanoparticles

2021 ◽  
Author(s):  
Huanan Yu ◽  
Wentao Qu ◽  
Feng Liu ◽  
Georg H. Mehl
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystal ◽  
Self Organization ◽  
Helix Formation ◽  
Chiral Nematic

Gold nanoparticles (NPs) were surface functionalized with hexanethiol groups and chiral nematic discogen ligands. A superlattice, liquid crystal behaviour and helix formation of the discs and a second helical organisation of the NPs were detected.

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