Preparation, surface modification and characterisation of solution cast starch PVA blended films

By R. Jayasekara, I. Harding, I. C. Bowater, G. Christie, G. Lonergan. 2004

332 citations recorded by the source corpus.

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.

Subfields: Biomaterials

View Paper: https://www.semanticscholar.org/paper/ea1f914b3b0117951c85f4c585410f5350c1d67c

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Citations in the corpus

• The effect of citric acid on the structural properties and cytotoxicity of the polyvinyl alcohol/starch films when molding at high temperature (2008, unknown): “to CAOAC ring vibrations on starch ( Jayasekara et al., 2004 ).”
• Starch/PVA-based nanocomposites reinforced with bamboo nanofibrils (2015, result): “Similar results were reported by Jayasekara et al. (2004) and RindlavWestling et al. (2002), whose fissures may have been caused by surface wrinkling due to the drying process or differences in the drying shrinkage related to the presence of the nanofibrils and agglomerates.”
• PVA, PVA Blends, and Their Nanocomposites for Biodegradable Packaging Application (2017, background): “On the other hand, Jayasekara et al.([101]) modified surface compatibility of PVA/starch films with the aid of chitosan, since the surface roughness of PVA was lower than that of”