Poly(benzoxazine-f-chitosan) films: The role of aldehyde neighboring groups on chemical interaction of benzoxazine precursors with chitosan
| Autor: | Hatsuo Ishida, Almahdi A. Alhwaige, Syed Qutubuddin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
Polymers and Plastics Organic Chemistry Cationic polymerization 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Chitosan Contact angle chemistry.chemical_compound Differential scanning calorimetry chemistry Polymerization Polymer chemistry Materials Chemistry Surface modification Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Carbohydrate Polymers. 209:122-129 |
| ISSN: | 0144-8617 |
| Popis: | This study reports the preparation and characterizations of chitosan-azomethine derivatives containing oxazine ring as new crosslinked polymers. The novel chitosan derivatives have been prepared by functionalization with reactive benzoxazine precursors. Two types of aldehyde-terminated benzoxazine precursors have been synthesized using two different polyetheramines (Jeffamines), 4-hydroxybenzaldehyde, and paraformaldehyde. The benzoxazine precursors are covalently attached to chitosan via Schiff’s base formation. Benzoxazine structure is confirmed by proton nuclear magnetic resonance spectroscopy (1H-NMR) and Fourier transform infrared spectroscopy (FT-IR), whereas the imine-linkage formation is confirmed by FT-IR. The benzoxazine-f-chitosan films are crosslinked by cationic ring-opening polymerization of benzoxazine. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) are used to study the thermal behavior of the obtained films. Wettability behavior of the resulting films was studied by contact angle measurements and compared with wettability of the neat chitosan film. |
| Databáze: | OpenAIRE |
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