Related Experiment Video
Updated: Jan 8, 2026
10:33
An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
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Cellulose-Refined Cholesteric Liquid Crystal Films with Both Right- and Left-Handed Circularly Polarized Light
Yu Sotoyama1, Yuki Ogiwara1, Kazuma Matsumoto1
1Department of Chemistry, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan.
Biomacromolecules
|December 17, 2025
Summary
Researchers developed a method to create cellulose films reflecting both right- and left-handed circularly polarized light (CPL). This advance in biomass conversion opens new possibilities for sustainable materials and optical devices.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optics
Background:
- Cellulose is a key renewable polymer for sustainable biomass refining.
- Hydroxypropyl cellulose (HPC) derivatives form right-handed cholesteric liquid crystal (CLC) mesophases, reflecting right-handed circularly polarized light (CPL).
- Controlling CPL reflection is crucial for advanced optical materials.
Purpose of the Study:
- To develop a strategy for preparing solid-state CLC films with both right- and left-handed CPL reflection.
- To investigate the mechanism of shear-induced CPL reflection.
- To demonstrate the fabrication of dual-handed CPL reflecting films using modified cellulose derivatives.
Main Methods:
- Chemically modified cellulose derivatives were subjected to controlled shearing using a rheometer.
- The Sénarmont method was employed to confirm shear-induced optical retardation.
- Both hydroxypropyl cellulose (HPC) and ethyl cellulose derivatives were utilized.
Main Results:
- Solid-state CLC films exhibiting both right- and left-handed CPL reflection were successfully prepared.
- Shear conditions induced optical retardation exceeding 300 nm by distorting helical molecular assemblages.
- Dual-handed CPL reflection was achieved using both inherently right-handed HPC and left-handed ethyl cellulose derivatives.
Conclusions:
- Shearing chemically modified cellulose derivatives is a viable strategy for creating films with tunable CPL reflection.
- The method allows for the fabrication of cellulose-based CLC films with both-handed CPL reflection.
- This research offers a pathway for advanced optical materials derived from sustainable biomass.
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