Self-assembly of cellulose nanocrystals confined to square capillaries

Ackroyd, Amanda J.; De Paolis, Adam; Xu, Yi-Tao; Momeni, Arash; Hamad, Wadood Y.; MacLachlan, Mark J.

doi:10.1039/d3nr02650g

Cited by 3 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 203,204 ] Finally, several research groups have begun to explore expanding beyond the 2 dimensions of flat films to form 3D materials including fibres [ 205 ] and aerogels. [ 206–210 ] Mechanistically, the formation of such structures follows a similar approach, whereby solvent evaporation (or more broadly, solvent removal) during the CNC self‐assembly process is confined in order to preserve 3‐dimensional structure, rather than collapse into 2‐dimensional films. Typically, these chiral nematic aerogels demonstrate much improved mechanical strength than their disordered counterparts, [ 208 ] and can themselves undergo post‐processing to incorporate additional functional components.…”

Section: The Future Is Green (And Red and Blue!)mentioning

confidence: 99%

Chiral nematic cellulose nanocrystal composites: An organized review

De France

2024

Can J Chem Eng

View full text Add to dashboard Cite

Cellulose nanocrystals (CNCs) are commercially available materials derived from cellulose, the most abundant biopolymer on our planet. Due largely to their high strength, high surface area‐to‐volume ratio, tailorable surface chemistry, and the abundance of biomass feedstocks with which to produce them, CNCs have attracted significant interest in applications spanning the paints and coatings, composites, packaging, and biomedical sectors. However, and perhaps most interestingly, CNCs will self‐assemble (or, as I've teased in the title, organize) to form highly ordered chiral nematic liquid crystal phases when concentrated in suspension. Upon complete solvent evaporation, this chiral nematic order is ‘locked’, yielding films with structural colour—colour arising not due to chemical pigments, but rather due to the physical structure of a material itself. In the pursuit of novel multi‐functional materials, research interest has shifted recently towards the incorporation of functional additives to form composite chiral nematic films. Along with introducing the basics of liquid crystals and self‐assembly, this review discusses the main approaches used in order to form CNC‐based composite films: co‐assembly, templating, and post‐processing, and highlights exceptional examples in each case. Finally, I give my uniquely Canadian perspective on the current status, future prospects, and major challenges associated with the development of CNC‐based chiral nematic composite materials.

show abstract

Section: The Future Is Green (And Red and Blue!)mentioning

confidence: 99%

Chiral nematic cellulose nanocrystal composites: An organized review

De France

2024

Can J Chem Eng

View full text Add to dashboard Cite

show abstract

“…12 Mark J. MacLachlan and coworkers reported on the self-assembly of CNCs confined to a square capillary, generating a concentric cylindrical shell structure. 13 The strategy of CNC self-assembly in continuous smooth microtubules for the fabrication of CNC photonic fibres opens the way for the formation and stabilization of CNC materials with continuous topologies. 14 In contrast, there is a particular interest in spherical geometry, and the effects of such topological constraints are increasingly being studied because of their potential applications in separators, lasers, or pigments.…”

mentioning

confidence: 99%

Large-scale production of chiral nematic microspheres

Jiaqi,

Zhixiang,

Sirui

et al. 2024

Chem. Commun.

View full text Add to dashboard Cite

show abstract

The Correlations between Microstructures and Color Properties of Nanocrystalline Cellulose: A Concise Review

Zhu,

Zhou,

Wang

et al. 2024

Polymers

View full text Add to dashboard Cite

Cellulose nanocrystals (CNCs) are a green resource which can produce photonic crystal films with structural colors in evaporation-induced self-assembly; CNC photonic crystal films present unique structural colors that cannot be matched by other colored materials. Recently, the mechanisms of CNC photonic crystal films with a unique liquid crystal structure were investigated to obtain homogenous, stable, and even flexible films at a large scale. To clarify the mechanism of colorful CNC photonic crystal films, we briefly summarize the recent advances from the correlations among the preparation methods, microstructures, and color properties. We first discuss the preparation process of CNCs, aiming to realize the green application of resources. Then, the behavior of CNCs in the formation of liquid crystal phases is studied, considering the influence of the CNCs’ size and shape, surface properties, and the types and concentrations of solvents. Finally, the film formation process of CNCs and the control of structural colors during the film formation are summarized, as well as the mechanisms of CNC photonic crystal films with full color. In summary, considering the above factors, obtaining reliable commercial CNC photonic crystal films requires a comprehensive consideration of the subsequent preparation processes starting from the preparation of CNCs.

show abstract

Self-assembly of cellulose nanocrystals confined to square capillaries

Abstract: The self-assembly of cellulose nanocrystals (CNCs) was studied in square capillaries. Confinement causes CNCs to form central defects surrounded by concentric chiral nematic layers that depend on the size of the capillary.

Cited by 3 publications

References 58 publications

Chiral nematic cellulose nanocrystal composites: An organized review

Chiral nematic cellulose nanocrystal composites: An organized review

Large-scale production of chiral nematic microspheres

The Correlations between Microstructures and Color Properties of Nanocrystalline Cellulose: A Concise Review

Contact Info

Product

Resources

About