Bilayered (silica-chitosan) coatings for studying dye release in aqueous media: The role of chitosan properties

Mátyás Dabóczi, Emoke Albert, Emil Agócs, Márta Kabai-Faix, Z. Hórvölgyi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Chitosan and bilayered - Rhodamine 6G impregnated silica-chitosan - coatings (300-3000 nm thick) were prepared and investigated as a model for controlled drug release. Properties of native, ionically (sodium triphosphate) and covalently (glutaraldehyde) cross-linked layers of chitosan in contact with aqueous phase (modeling human blood pH of ca. 7.3) were investigated. The cross-linking was confirmed by attenuated total reflection (ATR) Fourier transform infrared (FTIR), energy-dispersive spectroscopy (EDS) and solid state 13C nuclear magnetic resonance (NMR) spectroscopy. The evolution of advancing water contact angles as a function of time was measured, and from the results restricted mobility of polymer segments in the interfacial layer of cross-linked chitosan coatings were assumed. Spectroscopic ellipsometry measurements showed that covalent cross-linking leads to a lowered, while ionic cross-linking to an increased swelling degree of chitosan layers. Despite the swelling behavior both cross-linked chitosan layers showed significant retard effect on dye release from the bilayered coatings.

Original languageEnglish
Pages (from-to)137-145
Number of pages9
JournalCarbohydrate Polymers
Volume136
DOIs
Publication statusPublished - Jan 20 2016

Fingerprint

Chitosan
Silicon Dioxide
Coloring Agents
Dyes
Silica
Coatings
Swelling
Spectroscopic ellipsometry
Glutaral
Nuclear magnetic resonance spectroscopy
Contact angle
Energy dispersive spectroscopy
Fourier transforms
Polymers
Blood
Sodium
Infrared radiation
Water
Pharmaceutical Preparations

Keywords

  • Bilayered coatings
  • Contact angle
  • Cross-linked chitosan
  • Dye release
  • Ellipsometry
  • Swelling

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Bilayered (silica-chitosan) coatings for studying dye release in aqueous media : The role of chitosan properties. / Dabóczi, Mátyás; Albert, Emoke; Agócs, Emil; Kabai-Faix, Márta; Hórvölgyi, Z.

In: Carbohydrate Polymers, Vol. 136, 20.01.2016, p. 137-145.

Research output: Contribution to journalArticle

Dabóczi, Mátyás ; Albert, Emoke ; Agócs, Emil ; Kabai-Faix, Márta ; Hórvölgyi, Z. / Bilayered (silica-chitosan) coatings for studying dye release in aqueous media : The role of chitosan properties. In: Carbohydrate Polymers. 2016 ; Vol. 136. pp. 137-145.
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