Issue 41, 2016

A bio-inspired cellulose nanocrystal-based nanocomposite photonic film with hyper-reflection and humidity-responsive actuator properties

Abstract

We have developed a cellulose nanocrystal-based nanocomposite photonic film with a sandwich structure to mimic the shell structure of the Chrysina genus of beetles. The nanocomposite film was fabricated by embedding a uniaxially oriented polyamide-6 (PA-6) layer as a half-wave retarder layer between two cellulose nanocrystals (CNCs)/polyethylene glycol diacrylate (PEGDA) layers with a left-handed chiral nematic photonic structure. As a result, the reflectance intensity of the obtained nanocomposite film exceeds 50% (hyper-reflection) at a certain wavelength. More interestingly, asymmetric expansion/shrinkage of the CNCs/PEGDA layer in the nanocomposite film allows for simultaneous and reversible three-dimensional deformation behavior as well as the shift of the Bragg reflection when exposed to a humid environment. The proposed self-assembled photonic material will be attractive to be used as an optical anti-counterfeiting film, a tunable bandpass filter, a reflector or polarizer and a humidity-responsive actuator.

Graphical abstract: A bio-inspired cellulose nanocrystal-based nanocomposite photonic film with hyper-reflection and humidity-responsive actuator properties

Supplementary files

Article information

Article type
Paper
Submitted
20 رمضان 1437
Accepted
20 ذو الحجة 1437
First published
20 ذو الحجة 1437

J. Mater. Chem. C, 2016,4, 9687-9696

A bio-inspired cellulose nanocrystal-based nanocomposite photonic film with hyper-reflection and humidity-responsive actuator properties

T. Wu, J. Li, J. Li, S. Ye, J. Wei and J. Guo, J. Mater. Chem. C, 2016, 4, 9687 DOI: 10.1039/C6TC02629J

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