Microporous Nanocomposite Material Synthesized by Sol-Gel Processing in the Presence of Cyclodextrins

Shchipunov, Yu. A.; Krekoten, A. V.; Kuryavyi, V. G.; Topchieva, I. N.

doi:10.1007/s10595-005-0108-2

Cited by 15 publications

(17 citation statements)

References 24 publications

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“…Other organic compounds may also drive the assembly of precursors by forming complexes. This is the case of multifunctional compounds like diols, sugars and amino acids …”

Section: Resultsmentioning

confidence: 99%

Biocompatible Glycine‐Assisted Catalysis of the Sol‐Gel Process: Development of Cell‐Embedded Hydrogels

et al. 2019

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The sol‐gel process can be used for hydrogel cross‐linking, thus opening an attractive route for the design of biocompatible hydrogels under soft conditions. The sol‐gel process can be catalysed at basic or acidic pH values, under neutral conditions with the addition of a nucleophile. Therefore, working around pH 7 unlocks the possibility of direct cell embedment and the preparation of bioinks. We aimed to propose a generic method for sol‐gel 3D bioprinting, and first screened different nucleophilic catalysts using bis‐silylated polyethylene glycol (PEG) as a model hydrogel. A synergistic effect of glycine and NaF, used in low concentrations to avoid any toxicity, was observed. Biocompatibility of the approach was demonstrated by embedding primary mouse mesenchymal stem cells. The measure of viscosity as a function of time showed the impact of reaction parameters, such as temperature, complexity of the medium, pH and cell addition, on the kinetics of the sol‐gel process, and allowed prediction of the gelation time.

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“…Other organic compounds may also drive the assembly of precursors by forming complexes. This is the case of multifunctional compounds like diols, sugars and amino acids …”

Section: Resultsmentioning

confidence: 99%

Biocompatible Glycine‐Assisted Catalysis of the Sol‐Gel Process: Development of Cell‐Embedded Hydrogels

et al. 2019

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“…The polymers change the sol vate environment of ions 10,11 or participate in the reduc tion of the ions. 10 The polymers are most frequently used as special stabilizing agents preventing the tight contact between the nucleation centers of the growing metallic particles.…”

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confidence: 99%

Gold nanoparticles as structurizing agents for the formation of hybrid nanocomposites

et al. 2008

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Two types of transparent gold containing organo inorganic hybrid gels (polymer nanocomposites) in which gold nanoparticles (nano Au) are efficient species were synthe sized. The stage of hybrid gel formation is preceded by the in situ chemical reduction of chloroauric acid in an aqueous solution of the synthetic linear polymer (polyvinyl alcohol or poly(N vinylpyrrolidone)) affording a nano Au. The presence of ultradispersed gold particles in the obtained nanocomposites was confirmed by UV Vis spectroscopy and electron micro scopy. The loss of solubility of the films in water confirms the formation of a gel network. The size of the gold particles and characteristics of the hybrid gel change depending on the molecu lar weight of the polymer. The interaction of the macromolecules and growing particles mainly determines the diameter and number of particles of the inorganic phase, whereas the content of chloroauric acid affects these parameters to a less extent.

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“…Our attempts to biomimic the regulation of silica synthesis by biopolymers revealed various stages of their mineralization . The jellification of solutions was also found at certain conditions …”

Section: Jellification Through the Mineralizationmentioning

confidence: 98%

“…Ethylene glycol appearance in the reaction media after the hydrolysis and condensation (Eq. 3) is an advantage of THEOS ,,,,,. When common tetraethoxysilane (TEOS) is used, the ethanol is separated ,,.…”

Section: Jellification Through the Mineralizationmentioning

confidence: 99%

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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Microporous Nanocomposite Material Synthesized by Sol-Gel Processing in the Presence of Cyclodextrins

Cited by 15 publications

References 24 publications

Biocompatible Glycine‐Assisted Catalysis of the Sol‐Gel Process: Development of Cell‐Embedded Hydrogels

Biocompatible Glycine‐Assisted Catalysis of the Sol‐Gel Process: Development of Cell‐Embedded Hydrogels

Gold nanoparticles as structurizing agents for the formation of hybrid nanocomposites

Chitosan Hydrogels and Bionanocomposites Formed through the Mineralization and Regulated Charging

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