Structure and functional properties of glycerol-plasticized starch/TiO2 nanocomposite materials obtained through resonant wave mixing
- 64 Downloads
Resonant wave mixing is a promising technology based on employing non-linear waves to intensify heat and mass transfer and enhancing dispersion processes in mixed materials. In the present work, for the first time, resonant wave mixing was used to prepare film-forming dispersions based on gelatinized maize starch and spherical TiO2 nanoparticles (0.5–1.5 wt%) synthesized by sol–gel technique. Then, nanocomposite films were obtained by solution casting method. The dynamic viscoelastic properties, including relaxation spectra of the film-forming dispersions were investigated by oscillatory squeeze film rheometry, while the structure of the nanocomposite films was studied by X-ray diffraction, FTIR spectroscopy and scanning electron microscopy. The mechanical, water-related and UV-protective properties of the film materials were evaluated. It was shown that nanofiller incorporation enhanced the density of the 3D network structure of a gelatinized starch dispersion. The resonant wave treatment favored homogenous dispersion of the TiO2 nanoparticles in the nanocomposites. All nanocomposite film samples displayed higher tensile strength and lower water vapor permeability in comparison with starch films without the nanofiller. The obtained nanocomposites possessed UV-protective properties, which could be potentially applied to produce biodegradable packaging materials with improved functional characteristics.
KeywordsStarch film TiO2 nanoparticles Resonant wave mixing Rheology UV-protective properties
The authors would like to thank the Upper Volga Region Centre for Physicochemical Research (located at the G.A. Krestov Institute of Solution Chemistry of the RAS, Ivanovo, Russia) for providing the equipment of the Centre to carry out some of the measurements.
- 3.Koch K (2018) In: Sjöö M, Nilsson N (eds) Starch in food: structure, function and applications. Woodhead Publishing, CambridgeGoogle Scholar
- 4.Pérez S, Baldwin PM, Gallant DJ (2009) In: BeMiller J, Whistler R (eds) Starch: chemistry and technology, 3rd edn, Academic Press, BurlingtonGoogle Scholar
- 10.Díaz-Visurraga J, Melendrez MF, Garcia A, Paulraj M, Cardenas G (2010) Semi-transparent chitosan–TiO2 nanotubes composite film for food package applications. J Appl Polym Sci 116:3503–3515Google Scholar
- 13.Yun Y-H, Youn Y-N, Yoon S-D, Lee J-U (2012) Preparation and physical properties of starch-based nanocomposite films with the addition of titanium oxide nanoparticles. J Ceram Process Res 13:59–64Google Scholar
- 23.Aldoshin SM, Badamshina ER, Grishchuk AA, Tarasov AE, Estrin YI, Ganiev RF, Ganiev SR, Kasilov VP, Kurmenev DV, Pustovgar AP (2015) Study of the influence of single-wall carbon nanotube dispersion techniques upon the properties of epoxy resin-based nanocomposites. J Mach Manuf Reliab 44:271–275CrossRefGoogle Scholar
- 27.Tikhonov AN, Arsenin VY (1977) Solution of ill-posed problems. Wiley, New YorkGoogle Scholar
- 29.ASTM (2000) Standard test method for tensile properties of thin plastic sheeting, ASTM D882-00 method. American society for Testing and Materials International, West ConshohockenGoogle Scholar