Effect of thermal treatments on chiral nematic cellulose nanocrystal films

Guidetti, Giulia; Frka‐Petesic, Bruno; Dumanlı, Ahu Gümrah; Hamad, Wadood Y.; Vignolini, Silvia

doi:10.1016/j.carbpol.2021.118404

Cited by 9 publications

(8 citation statements)

References 52 publications

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Section: Photonic Cnc Structures With a Single Stimulusmentioning

confidence: 99%

“…Different types of cross-linkers are available for CNCs, as they allow for easy tuning of the surface due to the abundance of surface-active groups. Guidetti et al 63 tuned the optical properties of a CNC iridescent film under the influence of thermal treatments. The film maintained the chiral structure up to 250 °C after treatment with base and crosslinking with glutaraldehyde (GA).…”

Section: Acs Applied Polymer Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Cellulose Nanocrystals for Environment-Friendly Self-Assembled Stimuli Doped Multisensing Photonics

Verma

Chhajed

Singh

et al. 2022

ACS Appl. Polym. Mater.

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Materials such as cellulose and its derivatives are attracting growing attention worldwide to recognize their potential in responding to increasingly complex technological requirements. The rising demand for multifunctional materials may be fulfilled with controllable functionalities by using self-assembling techniques. Photonic stimuli-responsive materials based on cellulose can shift color reversibly when responding to external inputs. Cellulose nanocrystals (CNCs) are biorenewable materials that self-assemble themselves into a chiral nematic ordering exhibiting iridescent colors. The CNCs display unique optical features in response to environmental stimuli due to the structural coloration mechanism. This review summarizes the CNC-based multisensing photonic structures in response to external dopants. The inclusion of functional polymers, small molecules, or other optically active components into CNC precursors can enhance and stabilize their uniformity, allowing better stimuli interaction with the CNCs. This review reveals that cellulose-based nanomaterials are a potential candidate for designing advanced functional photonics materials in diverse applications for smart textiles, intelligent packaging, security coding, photonic papers, humidity sensors, etc., with some limitations to overcome.

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Section: Photonic Cnc Structures With a Single Stimulusmentioning

confidence: 99%

Section: Acs Applied Polymer Materialsmentioning

confidence: 99%

Cellulose Nanocrystals for Environment-Friendly Self-Assembled Stimuli Doped Multisensing Photonics

Verma

Chhajed

Singh

et al. 2022

ACS Appl. Polym. Mater.

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“…[76] Although many fascinating reports of CNC films, [77] this process limits to small scale and the drying time usually requires 3-7 days depending on the concentration and the thickness of the desired films. [78] To solve these, Benjamin et al reported the meter-long structurally colored cellulose nanocrystal films in a pilot-scale roll-to-toll unit. [79] Figure 2e presents the prepared red, green and blue films with uniform thickness, indicating high potential of commercialization.…”

Section: Preparing Photonic Films Prepared Using Casting-air/heatingmentioning

confidence: 99%

Progress, Challenge, and Perspective of Fabricating Cellulose

Qiao

Wang

et al. 2022

Macromol. Rapid Commun.

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Cellulose as the most abundant biopolymers on Earth, presents appealing performance in mechanical properties, thermal management, and versatile functionalization. Developing fabrication methods to design functional materials and open new application areas. However, cellulose is hard to be dissolved or melt due to its recalcitrant property. Herein, the recent progress of fabricating cellulose is summarized. First, the unique hierarchical structure of cellulose is fully investigated and the resulted processability is analysed in directions of down to nanocellulose, dissolution, and thermoplastic processing. Then, the reported fabrication methods are summarized in three aspects: (1) self‐assembly from nano/micro cellulose suspensions, especially the formation of cellulose nanocrystals; (2) dissolution–regeneration–drying, covering spinning and solvent infusion processing; and (3) thermoplastic processing, focusing on the setup and the morphology changes of the prepared products. In each aspect, the flowchart of the fabrication method, the mechanism, fabricated products, and effects of processing parameters are explored. Finally, this review provides a perspective on the further direction of fabricating cellulose, especially the challenges toward mass production.

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“…Thus, the polarization of reflected light gives accurate data concerning the chiral order of colorful CNC films 317 . The colour of films is iridescent in typical lighting conditions, depending on pitch length produced; iridescent nature of films comes from angle dependency and inhomogeneity of average pitch size across the produced film 318 . The immaculate films are fragile and have a non-uniform structure, limiting their use 242 ; as previously stated and suggested in other publications, it is advised to mix them with flexible particles and polymer.…”

Section: Optical and Optoelectronic Applicationsmentioning

confidence: 99%

Advanced applications of cellulose nanocrystals: a mini review

Moud

2022

Preprint

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Cellulose that has been acid hydrolyzed is what makes up cellulose nanocrystals (CNC). Due to CNCs biodegradability, renewability, sustainability, and mechanical properties, they have a wide range of applications in the biomedical, photonics, and material engineering fields. Rheology, or the flow behaviour of CNC dispersion, is integrally tied to the processing and design of CNC-based products, thus it is important and warrants inquiry to carefully examine the relationship between rheology's flow behaviour and their attributes. In this paper, we report the most recent findings on the advanced application of CNC suspension, aerogel, and hydrogels. Applications to technology and material science for developing advanced materials such as photonic tunable crystals, responsive materials, and thermal insulation packing materials were also covered.

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Effect of thermal treatments on chiral nematic cellulose nanocrystal films

Cited by 9 publications

References 52 publications

Cellulose Nanocrystals for Environment-Friendly Self-Assembled Stimuli Doped Multisensing Photonics

Cellulose Nanocrystals for Environment-Friendly Self-Assembled Stimuli Doped Multisensing Photonics

Progress, Challenge, and Perspective of Fabricating Cellulose

Advanced applications of cellulose nanocrystals: a mini review

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