Swelling Behavior of Physically Cross-Linked Gelatin Gels in Varied Salt Solutions

Qiao, Chuanling; Cao, Xiaolu

doi:10.1080/00222348.2013.837302

Cited by 18 publications

(19 citation statements)

References 48 publications

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“…In the case of gelatin A and B, the electrostatic attraction between oppositely charged groups leads to collapse and self‐aggregation of protein molecules at the pH IEP. 37‐39 At the isoelectric point of gelatin A (pH IEP = 7.0), the persistence length increases more than two times, leading to expansion of the macromolecular chain in response to an increase in salt concentration 40 . The antipolyelectrolyte effect, related to unfolding of amphoteric macromolecules, at the isoelectric point in the presence of neutral salts is a common phenomenon for annealed, quenched, and betaine‐type polyampholytes 7‐10 .…”

Section: Conformation and Phase Behavior Of Globular Proteins Amphotmentioning

confidence: 99%

Synthetic and natural polyampholytes: Structural and behavioral similarity

Kudaibergenov

2020

Polymers for Advanced Techs

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The ability of synthetic polyampholytes to adopt globular, coil, helix, and stretched conformations and to exhibit coil–globule, helix–coil, liquid–liquid, sol–gel phase transitions with respect to internal (structure, composition, charge distribution, hydrophobicity, hydrophilicity, and so forth) and external factors (pH, temperature, ionic strength, thermodynamic quality of solvents, and so forth) is very important in duplicating the structural hierarchy of proteins. In this review, the structural and behavioral similarities between synthetic and natural polymers are analyzed, primarily concentrating on synthetic polyampholytes, amphoteric polypeptides, and intrinsically disordered proteins (IDPs) in order to demonstrate the close relationship. The application aspects of polyampholytes and future opportunities are briefly outlined.

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Section: Conformation and Phase Behavior Of Globular Proteins Amphotmentioning

confidence: 99%

Synthetic and natural polyampholytes: Structural and behavioral similarity

Kudaibergenov

2020

Polymers for Advanced Techs

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“…Samples were withdrawn from the solution, gently blotted with absorbent paper, and weighed (W t ) at regular intervals of time until the swelling equilibrium was reached. Then, swelling ratio (SW%) and equilibrium swelling ratio (ESR) parameters were calculated according to Equations and , respectively

italicSW % = \frac{(W_{t} - W_{0})}{W_{0}} \times 100

italicESR = \frac{W_{e}}{W_{0}}

where W 0 is the initial dry sample weight and W e is the average sample weight at equilibrium.…”

Section: Methodsmentioning

confidence: 99%

Mechanical behavior of cold‐water fish gelatin gels crosslinked with 1,4‐butanediol diglycidyl ether

Czerner

Prudente

Martucci

et al. 2020

J of Applied Polymer Sci

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In this work, chemical crosslinking with 1,4‐butanediol diglycidyl ether (BDDGE) is used as strategy to enhance mechanical performance of fish gelatin (FG) gels in order to meet the properties' range of mammalian gelatin physical gels. Joint analysis of free amino groups, swelling ratio, and total soluble material indicates that crosslinking degree increases with increasing FG concentration and it is favored by a 0.2 BDDGE/FG ratio. Increasing crosslinking degree enhances gel indentation strength and shear modulus (μ) while decreases fracture toughness (GIC). Measured μ and GIC values lies within the range exhibited by mammalian gelatin physical gels, but the relationship between these parameters is opposite. This is due to the different fracture mechanisms occurring in chemically crosslinked and physical gels.

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“…14−16 In contrast, swelling of GEL close to its isoelectric point is enhanced due to the weaker ionic cross-linking between the charged amine and carboxyl groups. 17 Far away from the isoelectric point, screening of the repulsion between likely charged carboxyl or amino groups results in a GEL polyelectrolyte behavior, in which the degree of swelling decreases with an increasing salt concentration.…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolyte vs Polyampholyte Behavior of Composite Chitosan/Gelatin Films

et al. 2019

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Composite films of proteins and polysaccharides have a broad range of biomedical and food packaging applications, in which they are frequently exposed to fluid environments with varying ionic strengths. In the present work, we report the behavior of biopolymer films derived from chitosan (Ch), gelatin (GEL), and Ch/GEL mixture in salt solutions with varying concentrations and ion charges. The swelling and dissolution of the Ch films reduced with increasing salt concentration due to the polyelectrolyte behavior of this biopolymer, while the GEL films displayed a polyampholyte behavior, in which film swelling and dissolution were enhanced in salt solutions. Composite Ch/GEL films followed the behavior of GEL. The release of small ionic and zwitter-ionic molecules from the films was enhanced in ionic solutions due to the screened attraction between these molecules and the polymer matrix. These results provide insight into the behavior of protein/polysaccharide films in varying ionic environments, thus enabling enhanced design of biomaterials for a broad range of applications.

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Swelling Behavior of Physically Cross-Linked Gelatin Gels in Varied Salt Solutions

Cited by 18 publications

References 48 publications

Synthetic and natural polyampholytes: Structural and behavioral similarity

Synthetic and natural polyampholytes: Structural and behavioral similarity

Mechanical behavior of cold‐water fish gelatin gels crosslinked with 1,4‐butanediol diglycidyl ether

Polyelectrolyte vs Polyampholyte Behavior of Composite Chitosan/Gelatin Films

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