Preparation, surface modification and characterisation of solution cast starch PVA blended films
| Autor: | Greg T. Lonergan, Ian H. Harding, Ranjith Jayasekara, Ian C. Bowater, Gregor Bruce Yeo Christie |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Polymers and Plastics Scanning electron microscope Starch education Organic Chemistry technology industry and agriculture Analytical chemistry food and beverages macromolecular substances Polyvinyl alcohol Contact angle chemistry.chemical_compound Crystallinity chemistry Chemical engineering Surface roughness Surface modification Polymer blend |
| Zdroj: | Polymer Testing. 23:17-27 |
| ISSN: | 0142-9418 |
| DOI: | 10.1016/s0142-9418(03)00049-7 |
| Popis: | Several blends have been prepared of polyvinyl alcohol, starch and glycerol. The blend containing 20% polyvinyl alcohol has been modified by application of chitosan to the surface. The blend, and its modified form have been characterised by atomic force microscopy, x-ray diffraction, Fourier transform infra-red spectroscopy, contact angle measurements, 13C-NMR spectroscopy and scanning electron microscopy. The blended films were flexible and homogeneous on a macroscopic scale but on a microscopic scale there seemed to be small patches of individual components. Surface modification altered some of the characteristics of the film. The blends had surface roughness intermediate between that of the pure components. The addition of chitosan made the film more hydrophobic than the unmodified film but slightly less than the starch film. There was no evidence of new bond formation among the individual components. Solution casting reduced the overall crystallinity in the blended films. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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