Effects of concentration, degree of deacetylation and molecular weight on emulsifying properties of chitosan

Li, Xingke; Xia, Wenshui

doi:10.1016/j.ijbiomac.2011.02.016

Cited by 74 publications

(46 citation statements)

References 25 publications

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“…Chitosan is usually not mentioned in the group of polysaccharides with good emulsification properties, but several studies have shown that chitosan can in fact act as the sole emulsifier and produce emulsions of acceptable stability [55][56][57][58][59][60].…”

Section: Biopolymer Emulsifiersmentioning

confidence: 99%

“…On the other hand, the emulsification properties of the chitosans of lowest FA was assumed to be a function of the more extended molecular configuration (charge repulsion within the chitosan chains due to high content of charged amino groups) enabling the association between the acetyl groups and the oil droplet surfaces. For the chitosans of intermediate FA, the authors speculate that the poorer emulsifying properties are the combination of electrostatic repulsion and steric hindrance, making the association of the acetyl-groups with the oil phase more difficult [58].…”

Section: Emulsification Properties Of Chitosanmentioning

confidence: 99%

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Chitosan: Gels and Interfacial Properties

et al. 2015

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Abstract:Chitosan is a unique biopolymer in the respect that it is abundant, cationic, low-toxic, non-immunogenic and biodegradable. The relative occurrence of the two monomeric building units (N-acetyl-glucosamine and D-glucosamine) is crucial to whether chitosan is predominantly an ampholyte or predominantly a polyelectrolyte at acidic pH-values. The chemical composition is not only crucial to its surface activity properties, but also to whether and why chitosan can undergo a sol-gel transition. This review gives an overview of chitosan hydrogels and their biomedical applications, e.g., in tissue engineering and drug delivery, as well as the chitosan's surface activity and its role in emulsion formation, stabilization and destabilization. Previously unpublished original data where chitosan acts as an emulsifier and flocculant are presented and discussed, showing that highly-acetylated chitosans can act both as an emulsifier and as a flocculant.

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Section: Biopolymer Emulsifiersmentioning

confidence: 99%

Section: Emulsification Properties Of Chitosanmentioning

confidence: 99%

Chitosan: Gels and Interfacial Properties

et al. 2015

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“…Chitosan has received increased attention for its commercial applications in food industry . Furthermore, chitosan exhibits the potential to be used as food supplements with antitumor, antiulcer, antiuricemic and hypo cholesterolaemic properties …”

Section: Introductionmentioning

confidence: 99%

“…Payet and Terentjev monitored the surface tension of the water–paraffin interface and shown that although chitosan itself had only a weak surface activity, it enhanced the stability of O/W emulsions by increasing the matrix viscosity and forming a dense polyelectrolitic brush on the water side of oil–water interface. Li and Xia reported that 1% chitosan showed almost the same emulsifying activities as 1% gum Arabic but the emulsifying stabilities of 1% chitosan was much higher than that of 1% gum Arabic.…”

Section: Introductionmentioning

confidence: 99%

Preparation and functional evaluation of chitosan‐EGCG conjugates

Lei

Wang

Liang

et al. 2013

J of Applied Polymer Sci

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Chitosan, as a novel food additive, is proposed to conjugate with EGCG using a free radical grafting procedure. Chitosan is activated by hydroxyl free radicals produced by the redox reaction of hydrogen peroxide and ascorbic acid and subsequently react with EGCG. Chitosan‐EGCG conjugate has demonstrated by UV, FTIR, and 1H‐NMR spectroscopy and exhibits a dramatical increase in DPPH free radical scavenging activity. In addition, the LC (low‐molecular‐weight chitosan)‐EGCG conjugate is used to prepare O/W emulsion and then monitor the average droplet size, polydispersity index, zeta‐potential and transmission changes during centrifuge process, results show that the conjugate exhibited excellent emulsifying activity and superior emulsifying stability as compared with chitosan. Therefore, LC‐EGCG conjugate could be used as an efficient natural food antioxidant and emulsifier. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39732.

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“…Furthermore, the chitosan can act as emulsifying agent [35], producing homogenous composite films (observed in SEM pictures, Fig. 2), which enhances the biodegradability.…”

Section: Aerobic Biodegradationmentioning

confidence: 99%

Biodegradation Behavior of Composite Films with Poly (Vinyl Alcohol) Matrix

et al. 2011

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The main objective of this study was to develop biodegradable, composite materials, based on poly (vinyl alcohol), bacterial cellulose and chitosan for possible application in packaging industry. Two composite materials were prepared, one containing poly (vinyl alcohol) (PVA) and bacterial cellulose (BC), named PVA/BC, and the other containing PVA, BC but also chitosan (CTS), named PVA/BC/CTS. The biodegradation behavior was studied in a fed-batch bioreactor, in aerobic and anaerobic conditions, using activated sludge. Biodegradation tests were based on weight loss measurements. Structural changes were confirmed by Fourier transform infrared spectroscopy (FTIR) and the morphological ones by scanning electron microscopy (SEM). After 4 weeks, the biodegradation experiments have shown a relative high degradation of the PVA/BC/CTS film compared with the PVA/BC one. These results were confirmed by spectral analysis and also by SEM images. Besides, the SEM images revealed that biodegradation occurs also inside the composite materials, not only on the surface.

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Effects of concentration, degree of deacetylation and molecular weight on emulsifying properties of chitosan

Cited by 74 publications

References 25 publications

Chitosan: Gels and Interfacial Properties

Chitosan: Gels and Interfacial Properties

Preparation and functional evaluation of chitosan‐EGCG conjugates

Biodegradation Behavior of Composite Films with Poly (Vinyl Alcohol) Matrix

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