Intelligent core-shell nanoparticles and hollow spheres based on gelatin and PAA via template polymerization

Wang, Yansong; Zhang, Youwei; Du, Wenfeng; Wu, Chwan-Hwa; Zhao, Ji

doi:10.1016/j.jcis.2009.02.063

Cited by 19 publications

(10 citation statements)

References 48 publications

(55 reference statements)

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“…In addition, Fig. 4j-l showed a cluster structure of gelatin with 5% EAP, which is similar to other results (Wang et al 2009). The aggregation occurred in ?5% EAP gels, which might lead to low solubility of gels (Badii and Howell 2006).…”

Section: Afmsupporting

confidence: 89%

“…Before AFM imaging, all samples were melted in a 60°C water bath and stirred using a Vortex mixer (Fisher Scientific, Pittsburgh, PA, USA) according to the method of Wang et al (2009). About 20 lL of each diluted solution (50 lg/mL) was pipetted rapidly onto a piece of freshly cleaved glass sheet that was placed onto a 15 mm diameter AFM specimen disc.…”

Section: Atomic Force Microscopy (Afm)mentioning

confidence: 99%

See 1 more Smart Citation

Effect of egg albumen protein addition on physicochemical properties and nanostructure of gelatin from fish skin

Cai

Feng²,

Peng

et al. 2016

J Food Sci Technol

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The physicochemical properties and nanostructure of mixtures of egg albumen protein (EAP) and gelatin from under-utilised grass carp (Ctenopharyngodon idella) skins were studied. The gelatin with 1% EAP had an acceptable gel strength. The addition of 5% EAP significantly increased the melting and gelling temperatures of gelatin gels. Additionally, the colour turned white and the crystallinity was higher in gelatin gels with gradient concentrations of EAP (1, 3, and 5%). Gelatin with 5% EAP had the highest G 0 values while gelatin with 1% EAP had the lowest G 0 values. Atomic force microscopy showed the heterogeneous nanostructure of fish gelatin, and a simple coacervate with a homogeneous distribution was only observed with the addition of 1% EAP, indicating interaction between gelatin and EAP. These results showed that EAP effect fish gelatin's physicochemical and nanostructure properties and has potential applications in foods and pharmaceuticals.

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Section: Afmsupporting

confidence: 89%

Section: Atomic Force Microscopy (Afm)mentioning

confidence: 99%

Effect of egg albumen protein addition on physicochemical properties and nanostructure of gelatin from fish skin

Cai

Feng²,

Peng

et al. 2016

J Food Sci Technol

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show abstract

“…In a template polymerization, the polymerization and the polymertemplate interaction should occur simultaneously. The process is an easy and efficient method for obtaining nanoparticles (Wang et al 2009). Table 1 shows FT-IR absorption bands and their functional groups related to pure CS.…”

Section: Resultsmentioning

confidence: 99%

Chitosan nanoparticles as a modified diclofenac drug release system

et al. 2017

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This study evaluated a modified nanostructured release system employing diclofenac as a drug model. Biodegradable chitosan nanoparticles were prepared with chitosan concentrations between 0.5 and 0.8% (w/v) by template polymerization method using methacrylic acid in aqueous solution. Chitosanpoly(methacrylic acid) (CS-PMAA) nanoparticles showed uniform size around 50-100 nm, homogeneous morphology, and spherical shape. Raw material and chitosan nanoparticles were characterized by thermal analysis, Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM), confirming the interaction between chitosan and methacrylic acid during nanoparticles preparation. Diclofenac sorption on the chitosan nanoparticles surface was achieved by incubation in water/ethanol (1:1) drug solution in concentrations of 0.5 and 0.8 mg/mL. The diclofenac amount sorbed per gram of CS-PMAA nanoparticles, when in a 0.5 mg/mL sodium diclofenac solution, was as follows: 12.93, 15, 20.87, and 29.63 mg/g for CS-PMAA nanoparticles 0.5, 0.6, 0.7, and 0.8% (w/v), respectively. When a 0.8 mg/mL sodium diclofenac solution was used, higher sorption efficiencies were obtained: For CS-PMAA nanoparticles with chitosan concentrations of 0.5, 0.6, 0.7, and 0.8% (w/v), the sorption efficiencies were 33.39, 49.58, 55.23, and 67.2 mg/g, respectively. Diclofenac sorption kinetics followed a second-order kinetics. Drug release from nanoparticles occurred in a period of up to 48 h and obeyed Korsmeyer-Peppas model, which was characterized mainly by Fickian diffusion transport.

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“…They have a wide variety of applications in industrial settings, such as oil recovery and cleanup, 1−3 water remediation, 2,4−7 electrical multilayer assemblies, 8−10 complexation with nanoparticles, 11,12 fabrication of microwires, 13 as well as a number of biological applications. 14−17 Notably, simple PEs are similar to a number of naturally occurring molecules in environmental 18−21 and biological 22 systems, and thus can act as molecular models for studying these complex systems in controlled experiments.…”

Section: ■ Introductionmentioning

confidence: 99%

Metal Ions: Driving the Orderly Assembly of Polyelectrolytes at a Hydrophobic Surface

2012

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The accumulation of polyelectrolytes at the interface between water and nonpolar fluids is an important process in both environmental and biological systems. For instance, polyelectrolytes such as humic acids are highly charged molecules that play a role in the remediation of water contaminated by oil, and the adsorption of other polyelectrolytes such as proteins and DNA to cellular surfaces is essential in biological processes. The properties of these naturally occurring polyelectrolytes are highly tunable and depend strongly on the binding of metal ions commonly found in environmental and biological systems. While the metal complexation behaviors of many polyelectrolytes and biomolecules are well characterized in bulk solution, this work shows in molecular detail that the behavior of a common polyelectrolyte in the presence of metal ions can be quite different when it adsorbs to a hydrophobic-aqueous liquid interface. In these studies, vibrational sum frequency spectroscopy and interfacial tension measurements conducted on poly(acrylic acid) (PAA) at a model oil-water interface show how small amounts of monovalent and divalent cations significantly alter the interfacial conformation of PAA at the interface and act to enhance its interfacial adsorption. The results provide important new insights that have direct relevance for understanding the effect of metal ions on the adsorption of charged macromolecules to a hydrophobic-aqueous boundary layer, specifically in biological and environmental systems.

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Intelligent core-shell nanoparticles and hollow spheres based on gelatin and PAA via template polymerization

Cited by 19 publications

References 48 publications

Effect of egg albumen protein addition on physicochemical properties and nanostructure of gelatin from fish skin

Effect of egg albumen protein addition on physicochemical properties and nanostructure of gelatin from fish skin

Chitosan nanoparticles as a modified diclofenac drug release system

Metal Ions: Driving the Orderly Assembly of Polyelectrolytes at a Hydrophobic Surface

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