Bionanocomposite from self-assembled building blocks of nacre-like crystalline polymorph of chitosan with clay nanoplatelets

Sarin, S.; Kolesnikova, Sophia A.; Postnova, I. V.; Ha, Chang Sik; Shchipunov, Yu. A.

doi:10.1039/c6ra02996e

Cited by 14 publications

(11 citation statements)

References 71 publications

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“…Their thickness was highly uniform along the whole length. It did not exceed sometimes 15–25 nm . Similar, but shorter microparticles were observed on the film surface .…”

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizsupporting

confidence: 62%

“…New 69 sharp reflections were found after the formation of a film of chitosan with saponite (curve 2, Figure ). Detailed analysis of the diffractograms supplemented by small angle X‐ray data and examination under the scanning and transmission electron microscopes can be found in our previously published work . We arrived at the conclusion that the combination of the progressive charging in situ with the evaporation‐induced self‐assembly resulted in the formation of a new crystalline polymorph.…”

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizmentioning

confidence: 76%

“…Sophisticated treatment of the whole data performed in our works, led us to a model of the self‐organization of polysaccharide gradually charged in situ in solutions of oppositely charged nanoparticles. Schematic presentation is shown in Figure .…”

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizmentioning

confidence: 91%

“…Structural organization of crystalline chitosan‐saponite polymorph was revealed with the combination of various physico‐chemical techniques . There are two small angle X‐ray (SAXS) spectra in Figure a that were obtained for the saponite alone (curve 1) and for its film with chitosan prepared at their stoichiometric ratio (curve 2).…”

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizmentioning

confidence: 99%

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Chitosan Hydrogels and Bionanocomposites Formed through the Mineralization and Regulated Charging

Postnova

Силантьев

Sarin

et al. 2018

The Chemical Record

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The account presents survey of our systematic studies on chitosan. Only this polysaccharide bears cationic charges, possesses antimicrobial activity and wound healing ability that make it highly appropriate for using in medicine, biomedical engineering, cosmetics, food, packaging. However, its application meets with severe limitation. Chitosan belongs to polysaccharides that do not jellify solutions. Main approaches are based on the chemical modifications and cross-linking, but these treatments impairs therewith the biocompatibility and biological activity of chitosan. We have developed approaches in which monolithic hydrogels are fabricated via the mineralization of polysaccharide by method of green sol-gel chemistry and via the formation of polyelectrolyte complex with oppositely charged counterparts in the regime of its charging by means of regulated acidification. The latter approach was also extended for the preparation of chitosan bionanocomposites and films with nanoparticles.

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“…Their thickness was highly uniform along the whole length. It did not exceed sometimes 15–25 nm . Similar, but shorter microparticles were observed on the film surface .…”

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizsupporting

confidence: 62%

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizmentioning

confidence: 76%

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizmentioning

confidence: 91%

Section: Hydrogels and Bionanocomposites Prepared In The Self‐organizmentioning

confidence: 99%

See 2 more Smart Citations

Chitosan Hydrogels and Bionanocomposites Formed through the Mineralization and Regulated Charging

Postnova

Силантьев

Sarin

et al. 2018

The Chemical Record

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“…Hybrid nanocomposites are an important platform for the preparation of new materials with advanced properties [1][2][3][4][5][6][7][8]. Noble metal nanostructures encapsulated within or deposited on biopolymers are of particular interest for human [9,10], sensing [11,12], and catalytic applications [13][14][15][16], as these types of materials combine the physicochemical features of noble metal nanostructures and the biological features of polymers [17,18].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles on Chitosan/Silica Nanofibers: Characterization and Antibacterial Activity

Zienkiewicz-Strzałka

Deryło–Marczewska

Skorik

et al. 2019

IJMS

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A simple, low-cost, and reproducible method for creating materials with even silver nanoparticles (AgNP) dispersion was established. Chitosan nanofibers with silica phase (CS/silica) were synthesized by an electrospinning technique to obtain highly porous 3D nanofiber scaffolds. Silver nanoparticles in the form of a well-dispersed metallic phase were synthesized in an external preparation step and embedded in the CS/silica nanofibers by deposition for obtaining chitosan nanofibers with silica phase decorated by silver nanoparticles (Ag/CS/silica). The antibacterial activity of investigated materials was tested using Gram-positive and Gram-negative bacteria. The results were compared with the properties of the nanocomposite without silver nanoparticles and a colloidal solution of AgNP. The minimum inhibitory concentration (MIC) of obtained AgNP against Staphylococcus aureus (S. aureus) ATCC25923 and Escherichia coli (E. coli) ATCC25922 was determined. The physicochemical characterization of Ag/CS/silica nanofibers using various analytical techniques, as well as the applicability of these techniques in the characterization of this type of nanocomposite, is presented. The resulting Ag/CS/silica nanocomposites (Ag/CS/silica nanofibers) were characterized by small angle X-ray scattering (SAXS), X-ray diffraction (XRD), and atomic force microscopy (AFM). The morphology of the AgNP in solution, both initial and extracted from composite, the properties of composites, the size, and crystallinity of the nanoparticles, and the characteristics of the chitosan fibers were determined by electron microscopy (SEM and TEM).

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Polymer Based Hybrid Nanocomposites; A Progress Toward Enhancing Interfacial Interaction and Tailoring Advanced Applications

2017

The Chemical Record

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Organic/inorganic hybrid nanocomposites, in particular polymer based hybrid nanocomposites, constitute emerging advanced materials since they combine unique properties from the inorganic and organic (i. e. polymeric) components. We investigated three different hybrid nanocomposites depending on dimensions of the dispersed phase in the nanometer range,; polymer-layered silicate (PLS) nanocomposites where polymers are mixed with layered silicates, polymer/graphene oxide hybrid nanocomposites, and polymer hybrid nanocomposites with reinforcing polymers with isodimensional phases of inorganic silicas using sol-gel reactions. This Accounts reports the chronological progress of our landmark results on the polymer based hybrid nanocomposites of the three characteristic types that have been prepared in my laboratory for more than two decades, with their impacts, importance and advanced application of the related research fields for readers.

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Bionanocomposite from self-assembled building blocks of nacre-like crystalline polymorph of chitosan with clay nanoplatelets

Abstract: Films containing a new crystalline polymorph are prepared by a one-pot technique combining the formation of building blocks of clay nanoplatelets with chitosan macromolecules and their evaporation-induced self-assembly.

Cited by 14 publications

References 71 publications

Chitosan Hydrogels and Bionanocomposites Formed through the Mineralization and Regulated Charging

Chitosan Hydrogels and Bionanocomposites Formed through the Mineralization and Regulated Charging

Silver Nanoparticles on Chitosan/Silica Nanofibers: Characterization and Antibacterial Activity

Polymer Based Hybrid Nanocomposites; A Progress Toward Enhancing Interfacial Interaction and Tailoring Advanced Applications

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