Development and characterization of poly(vinyl alcohol) and casein blend films

U Durmaz B., AYTAÇ A.

POLYMER INTERNATIONAL, vol.68, no.6, pp.1140-1145, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 6
  • Publication Date: 2019
  • Doi Number: 10.1002/pi.5804
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1140-1145
  • Keywords: casein, poly(vinyl alcohol), plasticization, characterization, PROTEIN FILMS, MECHANICAL-PROPERTIES, BIODEGRADABLE FILMS, NANOCOMPOSITES, PLASTICIZERS, PVA
  • Kocaeli University Affiliated: Yes


Blends of plasticized casein (CA) and poly(vinyl alcohol) (PVA) at various ratios were prepared using the solution-casting method. The prepared blend solutions were cast onto polystyrene petri plates and bend films were obtained. The characterization of films was performed using Fourier transform infrared spectroscopy, tensile testing, thermogravimetric analysis, contact angle measurements and water vapour permeability. According to spectroscopic analysis, there were interactions between the CA and PVA molecules. The tensile test results showed that the tensile strength of CA increased with increasing PVA content. The flexibility of plasticized CA film increased with the incorporation of PVA. The thermal stability and water vapour barrier properties of plasticized CA improved on blending with PVA. As a result, it was seen that blend films were successfully produced using plasticized CA and PVA with potential for use in biodegradable packaging applications. (c) 2019 Society of Chemical Industry