2020
DOI: 10.1016/j.ijbiomac.2020.01.247
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Multifunctional cellulose nanocrystal structural colored film with good flexibility and water-resistance

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Cited by 31 publications
(25 citation statements)
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“…When the film is exposed to moisture, the CNCs layer begins to absorb water and swell, which has resulted in the enlargement of the pitch “ p ” of the CNCs cholesteric structure. [ 44 , 45 ] The film bends towards the side insensitive to water and increases the angle of incidence “ θ ”. In addition, n avg decreases because n values of CNCs and water are 1.54 and 1.33 respectively, which further induces the differences in reflection for samples.…”
Section: Resultsmentioning
confidence: 99%
“…When the film is exposed to moisture, the CNCs layer begins to absorb water and swell, which has resulted in the enlargement of the pitch “ p ” of the CNCs cholesteric structure. [ 44 , 45 ] The film bends towards the side insensitive to water and increases the angle of incidence “ θ ”. In addition, n avg decreases because n values of CNCs and water are 1.54 and 1.33 respectively, which further induces the differences in reflection for samples.…”
Section: Resultsmentioning
confidence: 99%
“…The small amount of CTAB may improve the uniform wetting of the ink on the film surface. 40,63 Photonic letters could be written on the CNC−ER film. To form the photonic letters, the pattern needed to be overwritten several times.…”
Section: ■ Experimental Sectionmentioning
confidence: 99%
“…Surfactants and polymers are often used as plasticizers to reduce the brittleness of chiral nematic CNC films. Unfortunately, many additives compatible with CNCs are also hydrophilic and the resultant composite films often interact strongly with water, leading to the loss of mechanical performance and structural color. Alkali treatment, glutaraldehyde-crosslinking, or poly­(ethylene glycol) diacrylate networks have been used to stabilize chiral nematic CNC films in water. Additives like oxidized starch and tannic acid have also been shown to improve the solvent resistance of CNC films . Recently, our group functionalized CNC-(hydroxypropyl cellulose) chiral nematic composite films with methacrylate groups to improve their stability in water .…”
Section: Introductionmentioning
confidence: 99%
“…12 Developing chiral nematic CNCs films with outstanding water resistance is urgently needed. Several strategies, including surface hydrophobic modification by triblock copolymer PEG-PPG-PEG and hexadecyltrimethoxysilane, 13 cross-linking via UV irradi-ation 14 or glutaraldehyde, 15 have been proposed to enhance their water resistance. However, for the green material of CNCs, a green process for improving its water tolerance is the best choice.…”
Section: ■ Introductionmentioning
confidence: 99%