Influence of cellulose nanocrystal aspect ratio on shear force aligned films: Physical and mechanical properties

Babaei-Ghazvini, Amin; Acharya, Bishnu

doi:10.1016/j.carpta.2022.100217

Cited by 17 publications

(12 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…later confirmed the findings of this work. For shear force alignments of larger CNCs vs shorter CNCs generated from wood, similar results were attained 78 . Researchers have just lately developed an interest in utilising capillaries to explore the confinement impact on LC.…”

Section: Introductionsupporting

confidence: 67%

Advanced applications of cellulose nanocrystals: a mini review

Moud

2022

Preprint

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionsupporting

confidence: 67%

Advanced applications of cellulose nanocrystals: a mini review

Moud

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Babaei-Ghazvini and Acharya [73] studied the impact of aspect ratio of CNCs extracted from club tunicates (TCNC: 65 aspect ratio) and wood (WCNC: 15 aspect ratio), and their hybrid mixtures (HCNC: TCNC +WCNC) on the rheology of resulted CNC suspension (Figure 5A). A strong co-relation between average viscosity of CNC suspension (at 1 wt.%) and aspect ratio of CNCs has been confirmed by them.…”

Section: Rheology Variation With Dimensions/ Aspect Ratio Of Cellulos...mentioning

confidence: 99%

Impact of physico‐chemical properties of nanocellulose on rheology of aqueous suspensions and its utility in multiple fields: A review

Rana

Thakur

2023

Vinyl Additive Technology

View full text Add to dashboard Cite

Nanocellulose (NC), due to its sustainable nature, high aspect ratio, superior mechanical strength, and availability of functionalizable OH groups, has been widely utilized as reinforcement in numerous fluids/plastics. The physico-chemical properties of NC, like surface characteristics, dimensions/ aspect ratio and their concentration, significantly impact the interparticle interactions, such as the extent of hydrogen bonding, van der Waal forces, hydrophobicity, electrostatic attraction/repulsion, and cellulose entanglement, and have been found to play a critical role in regulating the overall rheological characteristics of fluids. The functionalized NC aqueous suspension exhibited unique shear thinning properties, thixotropic behavior, and quick steady-state viscosity recovery and viscoelastic properties. However, upon adding functionalized NC to other fluids, a different impact was noticed. For instance, it improved the viscosity, G 0 and mechanical stability of bio-ink; the setting time and mechanical strength of cementitious fluids; increased the filtration performance and provided a unique thermo-thickening impact in case of water-based drilling-fluid; enhanced viscosity with time and heat in case of oil recovery, and so forth. Keeping in view the notable dependence of the rheology of fluids on NC additives, in the present review article, the impact of various physico-chemical properties of NC additives on the rheological behavior of NC aqueous suspension and its utility as a rheology modifier in multiple advanced fields has been explored. This review article, compared to previous studies, warrants an update on the impact of recent NC surface functionalization/ blending techniques employed and NC aspect ratio on specific properties of multiple advanced fluids.

show abstract

“…For example, diluted tunicate CNCs in an aqueous medium (1 wt %) with an aspect ratio of about 63 exhibited shear force alignment with a much higher Herman's order parameter of S = 0.53 ± 0.02 (Figure 8), where S = 0 represents an isotropic (randomly organized) system and S = 1 represents a perfectly aligned (anisotropic) arrangement. 73,74 Comparative results indicate that diluted wood CNCs in an aqueous medium (1 wt %) with an aspect ratio of about 12 assembled into chiral nematic ordering without alignment after applying shear force with a lower Herman's order parameter of S = 0.01 ± 0.01. 73 These alignment results are attributed to the different shear-thinning behavior of the CNC suspensions with different aspect ratios, which is achieved by decreasing the time or increasing the shear force application's velocity.…”

Section: Shear-inducedmentioning

confidence: 99%

“…73,74 Comparative results indicate that diluted wood CNCs in an aqueous medium (1 wt %) with an aspect ratio of about 12 assembled into chiral nematic ordering without alignment after applying shear force with a lower Herman's order parameter of S = 0.01 ± 0.01. 73 These alignment results are attributed to the different shear-thinning behavior of the CNC suspensions with different aspect ratios, which is achieved by decreasing the time or increasing the shear force application's velocity.…”

Section: Shear-inducedmentioning

confidence: 99%

Recent Advances and Opportunities for Cellulose Nanocrystal-Based Liquid Crystalline Polymer Hybrids and Composite Materials

Masese,

Njenga,

Ndaya

et al. 2023

Macromolecules

View full text Add to dashboard Cite

Cellulose nanocrystals (CNCs) are one-dimensional, rod-like, anisotropic, renewable, sustainable, and degradable polysaccharide-based materials with a high aspect ratio and tunable surface chemistry. The intriguing ability of CNCs to selfassemble into a lyotropic chiral nematic or cholesteric liquid crystal phase with a helical arrangement that exhibits birefringence, iridescence, and pitch-dependent 1D photonic properties has attracted significant research interests. However, there are several roadblocks in the application of CNCs as sustainable and degradable liquid crystal (LC) materials. These include (i) problems with aggregation of CNCs that prevent solubility in different solvents, (ii) difficulties in processing, aligning, and spatial and temporal control of lyotropic gels and dried films of CNCs, and (iii) poor mechanical and viscoelastic properties of these gels and films. This Perspective describes the synthetic methods used to functionalize CNCs with LC pendants or liquid crystalline polymers (LCPs) by chemical conjugation or physical self-assembly. These CNC hybrid materials showed improved solubility in a variety of solvents. The interplay between the liquid crystalline CNCs and liquid crystalline LCs or LCPs during self-assembly can be tailored by selecting LCs or LCPs of a diverging orientation order. The final self-assembled hierarchical structure with or without a field-directed assembly can be used to fabricate stimuli-responsive CNC hybrid materials. Furthermore, kinetic and thermodynamic control to align LC domains and prepare materials with long-range order are also discussed. Finally, spatial−temporal control, viscoelastic properties, and degradation of the CNC hybrid materials and their applications are also reported.

show abstract

Influence of cellulose nanocrystal aspect ratio on shear force aligned films: Physical and mechanical properties

Cited by 17 publications

References 68 publications

Advanced applications of cellulose nanocrystals: a mini review

Advanced applications of cellulose nanocrystals: a mini review

Impact of physico‐chemical properties of nanocellulose on rheology of aqueous suspensions and its utility in multiple fields: A review

Recent Advances and Opportunities for Cellulose Nanocrystal-Based Liquid Crystalline Polymer Hybrids and Composite Materials

Contact Info

Product

Resources

About