Determination of critical gel-sol transition point of Highly Concentrated Micellar Casein Concentrate using multiple waveform rheological technique

Seighalani, Fariba Zad Bagher; McMahon, Donald J.; Sharma, Prateek

doi:10.1016/j.foodhyd.2021.106886

Cited by 17 publications

(7 citation statements)

References 26 publications

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“…It is crucial to highlight that relying on the crossover of G ′ and G ″ may not offer the most accurate and precise determination of the gelation point given its dependence on the frequency applied during oscillatory shear testing. A Winter–Chambon analysis , certainly provides a more accurate and frequency-independent estimate of the gel point by considering the time at which the loss factor, tan δ, becomes independent of frequency due to the rubbery plateau of G ′ and G ″. Our main emphasis in this section of the manuscript is on comparing the gelation times of distinct hydrogel categories formed through various building blocks or cross-linking strategies.…”

Section: Resultsmentioning

confidence: 99%

Tailoring Network Topology in Mechanically Robust Hydrogels for 3D Printing and Injection

Ebrahimi,

Arreguín-Campos,

Dookhith

et al. 2024

ACS Appl. Mater. Interfaces

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Tissue engineering and regenerative medicine are confronted with a persistent challenge: the urgent demand for robust, load-bearing, and biocompatible scaffolds that can effectively endure substantial deformation. Given that inadequate mechanical performance is typically rooted in structural deficiencies�specifically, the absence of energy dissipation mechanisms and network uniformity�a crucial step toward solving this problem is generating synthetic approaches that enable exquisite control over network architecture. This work systematically explores structure−property relationships in poly(ethylene glycol)-based hydrogels constructed utilizing thiol−yne chemistry. We systematically vary polymer concentration, constituent molar mass, and cross-linking protocols to understand the impact of architecture on hydrogel mechanical properties. The network architecture was resolved within the molecular model of Rubinstein−Panyukov to obtain the densities of chemical cross-links and entanglements. We employed both nucleophilic and radical pathways, uncovering notable differences in mechanical response, which highlight a remarkable degree of versatility achievable by tuning readily accessible parameters. Our approach yielded hydrogels with good cell viability and remarkably robust tensile and compression profiles. Finally, the hydrogels are shown to be amenable to advanced processing techniques by demonstrating injection-and extrusion-based 3D printing. Tuning the mechanism and network regularity during the cell-compatible formation of hydrogels is an emerging strategy to control the properties and processability of hydrogel biomaterials by making simple and rational design choices.

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Section: Resultsmentioning

confidence: 99%

Tailoring Network Topology in Mechanically Robust Hydrogels for 3D Printing and Injection

Ebrahimi,

Arreguín-Campos,

Dookhith

et al. 2024

ACS Appl. Mater. Interfaces

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“…Where an increase in shear strain ( γ ) results in G ′ becoming less than G ′′, this cross-over point is identified as the gel/sol phase transition. 42 These data have been summarise in Table 3.…”

Section: Resultsmentioning

confidence: 99%

Controlling the structure of supramolecular fibre formation for benzothiazole based hydrogels with antimicrobial activity against methicillin resistantStaphylococcus aureus

et al. 2023

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“…Rheological analyses can simultaneously measure the characteristics of an elastic solid and a viscous fluid, which is suitable for studying the structure of complex fluids. However, a rheological analysis with a small deformation is not inhibited by structure in the measurement process and is often used to detect the transformation of hydrophilic food to a colloid sol–gel state [ 41 , 42 ]. GDL was used as a controlled-release H + donor to gradually change the pH of the pectin solution.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the gelation process of pectin could be easily captured through the analysis of the fluid characteristics. G′ and G″ represent the storage modulus (elastic part) and loss (viscous) modulus of fluid, respectively, which indicate the formation of structural or network bonding among polymer materials during the dynamic shear deformation process [ 41 ]. Typically, two fluid characteristics, denoted by G′ > G″ and G′ < G″, represent solid-like and liquid-like behavior, respectively.…”

Section: Resultsmentioning

confidence: 99%

Insights into the Acid-Induced Gelation of Original Pectin from Potato Cell Walls by Gluconic Acid-δ-Lactone

Lei,

Qin,

Wang

et al. 2023

Foods

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The acid-induced gelation of pectin in potato cell walls has been gradually recognized to be related to the improvement in the cell wall integrity after heat processing. The aim of this study was to characterize the acid-induced gelation of original pectin from a potato cell wall (OPP). Rheological analyses showed a typical solution–sol–gel transition process of OPP with different additions of gluconic acid-δ-lactone (GDL). The gelation time (Gt) of OPP was significantly shortened from 7424 s to 2286 s. The complex viscosity (η*) of OPP gradually increased after 4000 s when the pH was lower than 3.13 and increased from 0.15 to a range of 0.20~6.3 Pa·s at 9000 s. The increase in shear rate caused a decrease in η, indicating that OPP belongs to a typical non-Newtonian fluid. Furthermore, a decrease in ζ-potential (from −21.5 mV to −11.3 mV) and an increase in particle size distribution (from a nano to micro scale) was observed in OPP after gelation, as well as a more complex (fractal dimension increased from 1.78 to 1.86) and compact (cores observed by cryo-SEM became smaller and denser) structure. The crystallinity of OPP also increased from 8.61% to 26.44%~38.11% with the addition of GDL. The above results call for an investigation of the role of acid-induced OPP gelation on potato cell walls after heat processing.

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Determination of critical gel-sol transition point of Highly Concentrated Micellar Casein Concentrate using multiple waveform rheological technique

Cited by 17 publications

References 26 publications

Tailoring Network Topology in Mechanically Robust Hydrogels for 3D Printing and Injection

Tailoring Network Topology in Mechanically Robust Hydrogels for 3D Printing and Injection

Controlling the structure of supramolecular fibre formation for benzothiazole based hydrogels with antimicrobial activity against methicillin resistantStaphylococcus aureus

Insights into the Acid-Induced Gelation of Original Pectin from Potato Cell Walls by Gluconic Acid-δ-Lactone

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