Pickering emulsions stabilized by the complex of polystyrene particles and chitosan

Zhang, Shumin; Zhou, Yangen; Yang, Cheng

doi:10.1016/j.colsurfa.2015.06.029

Cited by 47 publications

(20 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such transition can be explained from two aspects. On the one hand, the cationic charge density along with the hydrophilicity (Zhang S. et al, 2015) of the chi-CLPs increased with higher chitosan-to-CLP coating ratio, which enhanced the attraction of chi-CLP to olive oil that contained 2 wt% of negatively charged oleic acids. On the other hand, the excess chitosan in the aqueous phase was likely involved in forming the emulsion with chi-CLP and thus reduced the coalescence of the oil droplets.…”

Section: Resultsmentioning

confidence: 99%

Natural Shape-Retaining Microcapsules With Shells Made of Chitosan-Coated Colloidal Lignin Particles

2019

View full text Add to dashboard Cite

Thin film coating of charged nanoparticles with oppositely charged polymers is an efficient and straightforward way for surface modification, but synthetic polyelectrolytes should be replaced by abundant biopolymers. In this study a thin film of chitosan was adsorbed onto colloidal lignin particles (CLPs) that were then systematically studied for olive oil stabilization with an objective to develop shape-retaining microcapsules that comprised of only renewable biomaterials. Full surface coverage was achieved with merely 5 wt% of chitosan relative to the dry weight of CLPs, reversing their surface charge from negative to positive. Such modification rendered the chitosan-coated particles excellent stabilizers for forming Pickering emulsions with olive oil. The emulsion droplets could be further stabilized by sodium triphosphate that provided ionic intra- and inter-particle cross-linking of the chitosan corona on the CLPs. Following the optimum conditions, the non-cross-linked microcapsules exhibited a strong stability against coalescence and the electrostatically stabilized ones additionally retained their shape upon drying and rewetting. Non-cross-linked microcapsules were used to demonstrate encapsulation and rapid release of ciprofloxacin as a model lipophilic drug in aqueous media. Overall, the combination of antimicrobial chitosan and antioxidative lignin nanoparticles hold unprecedented opportunities as biocompatible and biodegradable materials for controlled drug delivery.

show abstract

Section: Resultsmentioning

confidence: 99%

Natural Shape-Retaining Microcapsules With Shells Made of Chitosan-Coated Colloidal Lignin Particles

2019

View full text Add to dashboard Cite

show abstract

“…For a more biocompatible purpose, a few studies have been conducted using CS-solid particles complexity as the emulsifier. One recent research fabricated Pickering emulsion stabilized by the complex of PS particles and CS, which appeared to be more stable than emulsions prepared from individual PS or CS particles ( Zhang et al, 2015 ). They also proposed the mechanism that at lower CS concentration, the flocculation of PS particles was induced by the adsorption of CS, which served as the main emulsifier, whereas with the increase of CS concentration, the emulsion was stabilized by more free CS particles ( Zhang et al, 2015 ).…”

Section: Solid Particlesmentioning

confidence: 99%

An Overview of Pickering Emulsions: Solid-Particle Materials, Classification, Morphology, and Applications

et al. 2017

View full text Add to dashboard Cite

Pickering emulsion, a kind of emulsion stabilized only by solid particles locating at oil–water interface, has been discovered a century ago, while being extensively studied in recent decades. Substituting solid particles for traditional surfactants, Pickering emulsions are more stable against coalescence and can obtain many useful properties. Besides, they are more biocompatible when solid particles employed are relatively safe in vivo. Pickering emulsions can be applied in a wide range of fields, such as biomedicine, food, fine chemical synthesis, cosmetics, and so on, by properly tuning types and properties of solid emulsifiers. In this article, we give an overview of Pickering emulsions, focusing on some kinds of solid particles commonly serving as emulsifiers, three main types of products from Pickering emulsions, morphology of solid particles and as-prepared materials, as well as applications in different fields.

show abstract

“…In solid dosage forms, the chitosan has been used as excipient for tablets [ 3 , 4 ], diluent or granulating agent [ 5 , 6 ]. In liquid dispersions, this copolymer is also used as an emulsifying or thickness agent [ 7 , 8 ]. Furthermore, it has been applied in drug delivery systems for modulating the release or enhancing the solubility of pharmaceutical ingredients [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Tailoring Drug Release Properties by Gradual Changes in the Particle Engineering of Polysaccharide Chitosan Based Powders

et al. 2017

View full text Add to dashboard Cite

Chitosan is a natural copolymer generally available in pharmaceutical and food powders associated with drugs, vitamins, and nutraceuticals. This study focused on monitoring the effect of the morphology and structural features of the chitosan particles for controlling the release profile of the active pharmaceutical ingredient (API) propranolol hydrochloride. Chitosan with distinct molecular mass (low and medium) were used in the formulations as crystalline and irregular particles from commercial raw material, or as spherical, uniform, and amorphous spray-dried particles. The API–copolymer interactions were assessed when adding the drug before (drug-loaded particles) or after the spray drying (only mixed with blank particles). The formulations were further compared with physical mixtures of the API with chitin and microcrystalline cellulose. The scanning electron microscopy (SEM) images, surface area, particle size measurements, X-ray diffraction (XRD) analysis and drug loading have supported the drug release behavior. The statistical analysis of experimental data demonstrated that it was possible to control the drug release behavior (immediate or slow drug release) from chitosan powders using different types of particles.

show abstract

Pickering emulsions stabilized by the complex of polystyrene particles and chitosan

Cited by 47 publications

References 37 publications

Natural Shape-Retaining Microcapsules With Shells Made of Chitosan-Coated Colloidal Lignin Particles

Natural Shape-Retaining Microcapsules With Shells Made of Chitosan-Coated Colloidal Lignin Particles

An Overview of Pickering Emulsions: Solid-Particle Materials, Classification, Morphology, and Applications

Tailoring Drug Release Properties by Gradual Changes in the Particle Engineering of Polysaccharide Chitosan Based Powders

Contact Info

Product

Resources

About