The Role of Chitosan in Emulsion Formation and Stabilization

Klinkesorn, Utai

doi:10.1080/87559129.2013.818013

Cited by 121 publications

(72 citation statements)

References 106 publications

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“…By increasing the viscosity of the continuous phase, chitosan will increase the emulsions' creaming stability. The other important function of chitosan in emulsion stabilization is related to the electrostatically driven adsorption of the polymer to emulsion droplets stabilized by surfactants, proteins or polymers of opposite charge, creating a multilayer interfacial membrane [53,68]. Chitosan is unique in this regard as it is an abundant and cationic biopolymer, making it the biopolymer of choice for combination with the diversity of existing anionic surfactants, anionic biopolymers and proteins.…”

Section: Chitosan As Emulsion Stabilizermentioning

confidence: 99%

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 Previously unpublished original data where chitosan acts as an emulsifier and flocculant are presented and discussed, showing that highly-acetylated chitosans can act both as an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: Chitosan As Emulsion Stabilizermentioning

confidence: 99%

Chitosan: Gels and Interfacial Properties

et al. 2015

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“…Besides, the ability of trehalose to impose more local ordering to the surrounding water molecules and strengthen the hydrogen bonds [34,35] affects also the stability of emulsions in the aqueous phase by reducing its size [36]. Chitosan also can act as an emulsifier and emulsion stabilizer through adsorption on the protective layer at oil-water interfaces, viscosity enhancement, or by facilitating the interaction with other surface-active agents [37]. These mechanisms should be further analyzed, as well as the gel's microstructure.…”

Section: Transport Properties and Mobility By Low-field Nuclear Magnementioning

confidence: 99%

Encapsulation of a free-solvent extract of lycopene in alginate-Ca(II) beads containing sugars and biopolymers

Aguirre-Calvo

Santagapita

2017

Chem. Biol. Technol. Agric.

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Background:The purpose of the present study was to enhance the stability toward isomerization and control the release of an encapsulated free-solvent extract of lycopene, obtained from a nonconventional natural source, by means of alginate beads containing sugar (trehalose) and biopolymers (chitosan, low methoxyl pectin, and arabic gum). Methods:Lycopene was extracted from freeze-dried pulp of pink grapefruit obtaining a free solvent extract. Lycopene encapsulation was conducted by a double procedure consisting of emulsification and ionotropic gelation in alginate-Ca(II) beads, modified by the addition of sugar and biopolymers. The influence of beads' composition was studied on lycopene stability and release, as well as molecular mobility and diffusion in the beads. Results and Conclusions:The addition of a second excipient (besides alginate) in the formulation should be carefully conducted, since stability during alginate-Ca(II) bead generation could be even compromised, leading to high lycopene losses. Beads containing trehalose and chitosan were the ones that best preserved the lycopene content and minimized isomerization changes. This could be related to the reduced molecular mobility and lower diffusion coefficient of this system. Lycopene release was severely affected by the composition of the beads, allowing to modulate its release depending on a desired application. Then, a good strategy to obtain high lycopene formulations ready to use or for their incorporation in a subsequent technological process (such as freeze-drying or extrusion) was reported in the present study.

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“…Molecule weight of the chitosan is effective on its antibacterial feature [8]. Chemical process of Chitosan production [9].…”

Section: Structure and Features Of Chitosanmentioning

confidence: 99%

“…Practically, chitosan is used for emulsion stabilization, especially under acidic conditions. Because of its negative loaded surface droplets, chitosan has an electrostatic attraction and it has an important role in enabling emulsion development stability in foods through electrostatic stabilization [9].…”

Section: Its Contribution To Emulsion and Stabilizationmentioning

confidence: 99%

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A Renewable Natural Bioactive Polysaccharide: An Overview to Chitosan

Ayhan¹,

Şanlıer²

2015

IJNFS

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Chitin is a polysaccharide, which can be found in the structures of some insects, yeasts and fungi in nature.Chitosan is a compound, which is obtained by de -acetylation of chitin. Apart from that, there is chitosan naturally on the cell walls of some fungi, in yeasts and protozoa and in the outer shells of crustaceans. Chitosan is a molecule, which is frequently used in health field and food industry. It is frequently used in bioactive packing especially for its antibacterial effect. In addition, it is used in many areas such as waste treatment for its antioxidant feature. Areas of use of chitosan are expanding because it is an edible agent and because of its low level of toxic activity, and new areas of use are discovered everyday in good and health sectors.

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The Role of Chitosan in Emulsion Formation and Stabilization

Cited by 121 publications

References 106 publications

Chitosan: Gels and Interfacial Properties

Chitosan: Gels and Interfacial Properties

Encapsulation of a free-solvent extract of lycopene in alginate-Ca(II) beads containing sugars and biopolymers

A Renewable Natural Bioactive Polysaccharide: An Overview to Chitosan

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