The stress bifurcation and large amplitude oscillatory shear behavior of Kamani–Donley–Rogers model

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)

Published: Jan. 1, 2025

Large amplitude oscillatory shear (LAOS) test has been used to elucidate the nonlinear viscoelastic behaviors of soft matter or complex fluids under large and rapid deformations encountered in production application, especially for most polymeric materials. In this work, combined with recovery rheology, physical visualization start end yield stress values determined by algebraic bifurcation (ASB) method is further interpreted extenso. Facing issue unrecoverable that may occur below stress, ASB suggests stresses considering timescale, thereby linking determination behavior analysis LAOS. The unusual sharp corners Lissajous curves induced Kamani–Donley–Rogers (KDR) model are also revealed treated viscosity regularization. correlation among points bifurcation, responses KDR model, corresponding results insights main LAOS analyses representative cases comprehensively discussed. This work contributes a new understanding bifurcation.

Language: Английский

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Uncovering the effect of molecular structure on the rheology of welan gum by viscoelastic characterization, density functional theory and molecular dynamics simulation

Food Hydrocolloids, Journal Year: 2025, Volume and Issue: 163, P. 111074 - 111074

Published: Jan. 13, 2025

Language: Английский

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CELLULOSE NANOFIBERS (CNF) AND CELLULOSE NANOCRYSTALS (CNC) AS HIGH-PERFORMANCE FILLERS IMPROVING THE MECHANICAL, OPTICAL, AND SURFACE PROPERTIES OF RECYCLED NEWSPAPER

TURKISH JOURNAL OF FOREST SCIENCE, Journal Year: 2025, Volume and Issue: 9(1), P. 122 - 140

Published: April 30, 2025

The increasing focus on sustainability and waste reduction has led to significant interest in recycling paper products. This study investigates the use of two types nanocellulose (CNF CNC) as filler materials production recycled newspaper. aim is evaluate effects these nanocelluloses mechanical, optical, surface properties newspaper (ONP). Mechanical such tensile strength, burst tear resistance were measured determine material’s durability. Optical properties, including brightness, whiteness, yellowness, assessed understand aesthetic quality paper. Surface roughness values (Ra, Rz, Rq) also analyzed quality, which essential for printability. results show that CNF significantly improved strengths, well reduced making more visually appealing. CNC, other hand, demonstrated a notable enhancement strength but had less pronounced effect properties. demonstrates nanocellulose, particularly CNF, promising additive improving specific mechanical optical characteristics newspaper, it suitable various applications

Language: Английский

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Pickering emulsions for stimuli-responsive transdermal drug delivery: effect of rheology and microstructure on performance

Soft Matter, Journal Year: 2024, Volume and Issue: 20(43), P. 8621 - 8637

Published: Jan. 1, 2024

This work investigates the design of stimuli-responsive Pickering emulsions (PEs) for transdermal drug delivery applications, by exploring impact stabilising microgels size and interactions on their rheological release properties. Temperature-responsive poly(

Language: Английский

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Linear and Nonlinear Rheological Investigations of Poly(3-hexylthiophene) H-Aggregated Gel Networks

The Journal of Physical Chemistry B, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

Owing to its facile synthesis and low cost, poly(3-hexylthiophene) (P3HT) has been extensively investigated in the field of organic electronics. Well-defined packing P3HT chains getting controlled morphologies, which solely depend on polarity solvent, remain challenging. Herein, aggregation behaviors solvents having different solvent polarities have achieve orderings (H-type or J-type). The solution phase subsequent structural as well morphological by absorption, X-ray powder diffraction, topological studies, respectively. It noticed from absorption studies that forms H-type aggregates anisole, phenetole, etc., whereas it produces J-type toluene. More surprisingly, aggregations at concentrations (CP3HT = 0.001 g/cm3) eventually lead formation gel network ceases flow solvents. Contrary expectations, toluene does not produce said concentration. Further, reveal viscoelastic microstructural properties, networks thoroughly small-amplitude oscillatory shear (SAOS) large-amplitude (LAOS) with varying concentrations, solvents, molecular weights P3HT. With quantitative analysis, nonlinear rheological characteristics higher harmonics, strain-stiffening ratio, shear-thinning dissipation intracycle transient moduli, derivative moduli evaluated for networks, significantly provide information understanding conducting polymer networks.

Language: Английский

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Physicochemical, morphological, and rheological properties of cellulose nanofibrils produced via ultra-high-pressure homogenization

Carbohydrate Polymer Technologies and Applications, Journal Year: 2024, Volume and Issue: unknown, P. 100635 - 100635

Published: Dec. 1, 2024

Language: Английский

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