Chirality Transfer from an Innately Chiral Nanocrystal Core to a Nematic Liquid Crystal: Surface‐Modified Cellulose Nanocrystals

2021 ◽  
Author(s):  
Torsten Hegmann ◽  
Diana P. N. Gonçalves
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Cellulose Nanocrystals ◽  
Crystal Surface ◽  
Chirality Transfer ◽  
Surface Modified ◽  
Modified Cellulose

Octadecylamine as chemical modifier for tuned hydrophobicity of surface modified cellulose: toward organophilic cellulose nanocrystals

Cellulose ◽  
2021 ◽  
Author(s):  
Mohammed Majdoub ◽  
Younes Essamlali ◽  
Othmane Amadine ◽  
Ikram Ganetri ◽  
Anass Hafnaoui ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Chemical Modifier ◽  
Surface Modified ◽  
Modified Cellulose

Orientational effects of h-bonding in the chirality transfer from (2R,3R)‑(−)‑2,3-butandiol to polar nematic liquid crystal

2019 ◽  
Vol 274 ◽  
pp. 550-555 ◽  
Author(s):  
V.V. Aleksandriiskii ◽  
I.V. Novikov ◽  
L.O. Monakhov ◽  
V.A. Burmistrov ◽  
O.I. Koifman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Chirality Transfer

Surface modified cellulose nanocrystals for tailoring interfacial miscibility and microphase separation of polymer nanocomposites

Cellulose ◽  
2019 ◽  
Vol 26 (7) ◽  
pp. 4301-4312 ◽  
Author(s):  
Jinlong Zhang ◽  
Mei-Chun Li ◽  
Xiuqiang Zhang ◽  
Suxia Ren ◽  
Lili Dong ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Cellulose Nanocrystals ◽  
Microphase Separation ◽  
Surface Modified ◽  
Modified Cellulose

Lyotropic liquid crystal to measure residual dipolar couplings in dimethyl sulfoxide based on modified cellulose nanocrystals

2020 ◽  
Vol 44 (11) ◽  
pp. 4262-4265 ◽  
Author(s):  
Zong-Kai Ma ◽  
Xiao-Yang Han ◽  
Han Liu ◽  
Jia-Cheng Ji ◽  
Si-Yong Qin ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Dimethyl Sulfoxide ◽  
Cellulose Nanocrystals ◽  
Residual Dipolar Couplings ◽  
Organic Molecules ◽  
Dipolar Couplings ◽  
Lyotropic Liquid Crystal ◽  
Modified Cellulose

A novel lyotropic liquid crystal was developed for the measurement of RDCs of organic molecules with no background signals.

scholarly journals Mechanical and Optical Properties of Polylactic Acid Films Containing Surfactant-Modified Cellulose Nanocrystals

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Jose Luis Orellana ◽  
Derek Wichhart ◽  
Christopher L. Kitchens
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Optical Properties ◽  
Polylactic Acid ◽  
Cellulose Nanocrystals ◽  
Cetyltrimethylammonium Bromide ◽  
Polymeric Matrices ◽  
Nanoscale Structure ◽  
Surface Modified ◽  
Modified Cellulose

The addition of surface-modified cellulose nanocrystals (CNCs) to polymeric matrices can lead to an enhancement of the mechanical and optical properties of host polymers. The use of surfactants can provide an easy and effective way to change the CNC functionality and to evaluate the effects of surface chemistry in the reinforcement mechanisms. In this work, CNCs were solution blended with polylactic acid (PLA) and melt extruded into films. The PLA toughness increased from 1.70 MJ/m3to 2.74 MJ/m3, a 61% increase, with the addition of 1% of decylamine-modified CNCs without a decrease of the tensile strength or modulus. In this work, we investigated the use of two surfactants, decylamine and cetyltrimethylammonium bromide, to enhance CNC compatibility with the hydrophobic PLA matrix. Decylamine at 1.0 wt.% with respect to CNC loading was found to significantly enhance CNC compatibility and property enhancement. The low concentration of surfactant is notable, as other works typically use significantly higher loadings for CNC incorporation and property enhancement. At high CNC concentrations, mechanical properties decreased but the aligned assembly of the CNCs provided intricate colors to the films when observed between crossed polars. The alignment and nanoscale structure of CNCs within the films play an important role in the properties obtained.

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