title: Synergistic reinforcing effect of TiO2 and montmorillonite on potato starch nanocomposite films: Thermal, mechanical and barrier properties.
abstract: In this study, ternary potato starch (PS) bionanocomposite films containing two types of nanoparticles, sodium montmorillonite (MMT), one-dimensional (1D) clay platelets, (3 and 5wt%) and TiO2, three-dimensional (3D) nanospheres, (0.5, 1 and 2wt%), are prepared using solvent casting method. X-ray diffraction (XRD) test confirms the completely exfoliated structure formed in the PS-MMT nanocomposites containing 3 and 5% MMT. The success of the formation of new hydrogen bonds between the hydroxyl groups of starch and nanofillers is confirmed by Fourier transform infrared (FTIR) spectroscopy. Tensile strength (TS), elongation at break (EB), glass transition temperature (Tg), and melting point (Tm) of the films are also enhanced after MMT and TiO2 incorporation. The water vapor permeability (WVP) and the visible, UVA, UVB and UVC lights transmittance decreases upon TiO2 and MMT content increasing. Generally, a synergistic effect is observed between MMT and TiO2 at lower concentrations of MMT.
authors: Agricultural Engineering Research Department, Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Mashhad, Iran; Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
authors: Seyed Amir
authors: SA
authors: Oleyaei
authors: Department of Food Science and Technology, Faculty of Agriculture, Urmia University, P.O. Box 57561-51818, Urmia, Iran. Electronic address: h.almasi@urmia.ac.ir.
authors: Hadi
authors: H
authors: Almasi
authors: Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
authors: Babak
authors: B
authors: Ghanbarzadeh
authors: Seed and Plant Improvement Institute, Crop Science Department, Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Mashhad, Iran.
authors: Ali Akbar
authors: AA
authors: Moayedi
mesh_terms: D001546:Bentonite / Q000737:chemistry / Q000494:pharmacology*; D018857:Food Packaging; D008567:Membranes, Artificial; D053761:Nanocomposites / Q000737:chemistry*; D010539:Permeability; D011198:Solanum tuberosum / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D013227:Steam / Q000032:analysis; D013696:Temperature; D013718:Tensile Strength; D013816:Thermodynamics; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D008567:Membranes, Artificial; D013227:Steam; D001546:Bentonite; C009495:titanium dioxide; D013213:Starch; D014025:Titanium
keywords: Calcium nitrite (PubChem CID: 159695); Calcium sulphate (PubChem CID: 24497); FTIR; Glycerol (PubChem CID: 753); Montmorillonite; Physical properties; Potassium sulphate (PubChem CID: 24507); Potato starch; TiO(2); XRD