Understanding viscoelastic behavior of hybrid nanocellulose film based on rheological and electrostatic observation in blended suspension

Kim, Minhyung; Kim, Suhnue; Han, Nuri; Lee, Sang‐Hyun; Kim, Hyungsup

doi:10.1016/j.carbpol.2022.120218

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…However, there is a long tradition of “measuring” the largest Newtonian viscosity below the yield point. Historically, this is associated with the concept of a “complete” flow curve [ 65 , 66 ], but experimental results of this kind are also often presented in modern publications [ 67 , 68 , 69 , 70 , 71 , 72 ],…”

Section: Gels and Gel-like Statesmentioning

confidence: 99%

Rheology of Gels and Yielding Liquids

Malkin,

Derkach,

Kulichikhin

2023

Gels

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In this review, today’s state of the art in the rheology of gels and transition through the yield stress of yielding liquids is discussed. Gels are understood as soft viscoelastic multicomponent solids that are in the incomplete phase separation state, which, under the action of external mechanical forces, do not transit into a fluid state but rupture like any solid material. Gels can “melt” (again, like any solids) due to a change in temperature or variation in the environment. In contrast to this type of rheology, yielding liquids (sometimes not rigorously referred to as “gels”, especially in relation to colloids) can exist in a solid-like (gel-like) state and become fluid above some defined stress and time conditions (yield stress). At low stresses, their behavior is quite similar to that of permanent solid gels, including the frequency-independent storage modulus. The gel-to-sol transition considered in colloid chemistry is treated as a case of yielding. However, in many cases, the yield stress cannot be assumed to be a physical parameter since the solid-to-liquid transition happens in time and is associated with thixotropic effects. In this review, special attention is paid to various time effects. It is also stressed that plasticity is not equivalent to flow since (irreversible) plastic deformations are determined by stress but do not continue over time. We also discuss some typical errors, difficulties, and wrong interpretations of experimental data in studies of yielding liquids.

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Section: Gels and Gel-like Statesmentioning

confidence: 99%

Rheology of Gels and Yielding Liquids

Malkin,

Derkach,

Kulichikhin

2023

Gels

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“…[31] Nowadays, the rheological properties of NC suspensions, such as their shear thinning behavior, yield stress, viscosity, viscoelasticity, and thixotropy, have received a lot of attention. [32][33][34] At a suitable concentration, NC produces a highly viscous aqueous suspension due to the prevalence of percolation interconnections/networks and chemical bonding/attractions (such as electrostatic repulsion and attraction, hydrogen bonding, van der Waals and hydrophobic attraction) along with entanglement. Continuous shearing of suspension causes NC to align itself with the flow direction, thus showing shear thinning behavior.…”

Section: Introductionmentioning

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

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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.

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