Properties of chitosan/soy protein blended films with added plasticizing agent as a function of solvent type at acidic pH

Boy, Ramiz; Maness, Chandler; Kotek, Richard

doi:10.1080/00914037.2015.1038821

Cited by 13 publications

(7 citation statements)

References 38 publications

(39 reference statements)

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“…Without a plasticizer, SPI-based film exhibited low strength and flexibility due to the rigid and brittle properties of protein. However, with the modification of chitosan, the TS values of SPI–CS films increased slightly, indicating that the addition of chitosan could improve the strength of SPI films slightly, which was attributed to the hydrogen bonding in the polymers [ 21 ]. Moreover, the results also showed that the EB values of composite films obviously increased from 17.63% to 62.86% with the modification of chitosan, indicating that chitosan might cause a plasticizing effect on the protein matrix [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

“…As one of the most abundant natural biopolymers, chitosan is the N -deacetylated derivative of chitin and contains β-1-4 linked 2-amino-2-deoxy- d -glucopyranose repeat units [ 17 , 18 ]. Previous studies have shown that chitosan may interact with proteins to form films with enhanced mechanical properties [ 19 , 20 , 21 ]. However, natural defects and compatibility problems of the components might limit further application of these CS/SPI composite films.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Chitosan/Soy Protein Isolate Nanocomposite Film Reinforced by Cu Nanoclusters

et al. 2017

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Soy protein isolate (SPI) based films have received considerable attention for use in packaging materials. However, SPI-based films exhibit relatively poor mechanical properties and water resistance ability. To tackle these challenges, chitosan (CS) and endogenous Cu nanoclusters (NCs) capped with protein were proposed and designed to modify SPI-based films. Attenuated total reflectance-Fourier transform infrared spectroscopy and X-ray diffraction patterns of composite films demonstrated that interactions, such as hydrogen bonds in the film forming process, promoted the cross-linking of composite films. The surface microstructure of CS/SPI films modified with Cu NCs was more uniform and transmission electron microscopy (TEM) showed that uniform and discrete clusters were formed. Compared with untreated SPI films, the tensile strength and elongation at break of composite films were simultaneously improved by 118.78% and 74.93%, respectively. Moreover, these composite films also exhibited higher water contact angle and degradation temperature than that of pure SPI film. The water vapor permeation of the modified film also decreased. These improved properties of functional bio-polymers show great potential as food packaging materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Chitosan/Soy Protein Isolate Nanocomposite Film Reinforced by Cu Nanoclusters

et al. 2017

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“…As plasticizer, 66.7% (w/w protein) glycerol was added, with the percentage here referring to the actual amount of protein in the solution. Glycerol is a commonly used plasticizer for biopolymer films (Gao et al, 2006; Aritonang and Melia, 2014; Jost et al, 2014; Jost and Langowski, 2015; Boy et al, 2016; Jost and Stramm, 2016). To avoid gel formation and to mix the components, the stirrer temperature was kept at 50°C for an additional 30 min at 200 rpm.…”

Section: Methodsmentioning

confidence: 99%

Effect of Sodium Sulfite, Sodium Dodecyl Sulfate, and Urea on the Molecular Interactions and Properties of Whey Protein Isolate-Based Films

et al. 2017

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Whey protein coatings and cast films are promising for use as food packaging materials. Ongoing research is endeavoring to reduce their permeability. The intention of this study was to evaluate the effect of the reactive additives sodium sulfite, sodium dodecyl sulfate (SDS), and urea on the oxygen barrier, water vapor barrier, and protein solubility of whey protein cast films. The concentration of the reactive additives was 1 to 20 wt.-%. Dried whey protein cast films were used as substrate materials. The water vapor transmission rate, the oxygen permeability, and the protein solubility were measured. Effective diffusion coefficients and effective sorption coefficients were calculated from the results of the water vapor sorption experiments. The presence of sodium sulfite resulted in an increased number of hydrophobic interactions and hydrogen bonds and a slightly decreased number of disulfide bonds. The oxygen permeability decreased from 68 to 46 cm3 (STP/standard temperature and pressure) 100 μm (m2 d bar)−1 for 1 wt.-% SDS in the whey protein cast film. The water vapor transmission rate decreased from 165 to 44 g 100 μm (m2 d)−1 measured at 50 to 0% r. h. for 20 wt.-% SDS in the whey protein cast film. The reduction in the water vapor transmission rate correlated with the lower effective diffusion coefficient.

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“…However, the effectiveness of the antimicrobial activity of chitosan is highly dependent on the type of target microorganism [ 29 , 36 , 84 , 88 , 90 , 103 , 107 ]. Furthermore, the mechanisms of the antimicrobial activity of chitosan are associated with its physicochemical properties [ 4 , 37 , 43 , 90 , 103 , 108 , 109 , 110 , 111 , 112 ]. Thus, this review article highlights the antimicrobial properties of chitosan, the factors that influence its antimicrobial activity, how bacteria and fungi respond to chitosan, and what regulators are involved in this antimicrobial response.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Actions and Applications of Chitosan

et al. 2021

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Chitosan is a naturally originating product that can be applied in many areas due to its biocompatibility, biodegradability, and nontoxic properties. The broad-spectrum antimicrobial activity of chitosan offers great commercial potential for this product. Nevertheless, the antimicrobial activity of chitosan varies, because this activity is associated with its physicochemical characteristics and depends on the type of microorganism. In this review article, the fundamental properties, modes of antimicrobial action, and antimicrobial effects-related factors of chitosan are discussed. We further summarize how microorganisms genetically respond to chitosan. Finally, applications of chitosan-based biomaterials, such as nanoparticles and films, in combination with current clinical antibiotics or antifungal drugs, are also addressed.

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Properties of chitosan/soy protein blended films with added plasticizing agent as a function of solvent type at acidic pH

Cited by 13 publications

References 38 publications

Preparation and Characterization of Chitosan/Soy Protein Isolate Nanocomposite Film Reinforced by Cu Nanoclusters

Preparation and Characterization of Chitosan/Soy Protein Isolate Nanocomposite Film Reinforced by Cu Nanoclusters

Effect of Sodium Sulfite, Sodium Dodecyl Sulfate, and Urea on the Molecular Interactions and Properties of Whey Protein Isolate-Based Films

Antimicrobial Actions and Applications of Chitosan

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