title: Preparation and characterization of bionanocomposite films based on potato starch/halloysite nanoclay.
abstract: In this research casting method was used to prepare potato starch based bio-nanocomposite films with halloysite nanoclay as the reinforcing materials. The composition included potato starch with 40% (w/w) of a mixture of sorbitol/glycerol (weight ratio of 3 to 1as plasticizer) with nanoclay (0-5% w/w). The films were dried under controlled conditions. Physicochemical properties such as solubility in water, water absorption capacity (WAC), water vapour permeability (WVP), oxygen permeability, and mechanical properties of the films were measured. Results showed that by increasing the concentration of nanoclay, mechanical properties of films were improved. Tensile strength was increased from 7.33 to 9.82MPa, and elongation at break decreased from 68.0 to 44.0%. Solubility in water decreased from 35 to 23%, and heat seal strength increased from 375 to 580N/m. Also incorporation of clay nanoparticles in the structure of biopolymer decreased permeability of the gaseous molecules. In summary, addition of halloysite nanoclay, improve the barrier and mechanical properties of potato starch films and this bionanocomposites have high potential to be used for food packaging purposes.
authors.affiliation: Biopolymer Research Group, Food Science and Technology Division, Agriculture Department, Damghan Branch, Islamic Azad University, Damghan, Semanan, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Sadegh-Hassani
authors.affiliation: Biopolymer Research Group, Food Science and Technology Division, Agriculture Department, Damghan Branch, Islamic Azad University, Damghan, Semanan, Iran. Electronic address: fstiau@damghaniau.ac.ir.
authors.forename: Abdorreza
authors.initials: A
authors.lastname: Mohammadi Nafchi
mesh_terms: D000538:Aluminum Silicates / Q000138:chemical synthesis / Q000737:chemistry*; D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry; D001704:Biopolymers / Q000737:chemistry; D000077215:Clay; D018857:Food Packaging; D006801:Humans; D053761:Nanocomposites / Q000737:chemistry*; D011198:Solanum tuberosum / Q000737:chemistry; D013213:Starch / Q000138:chemical synthesis / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D001672:Biocompatible Materials; D001704:Biopolymers; D014867:Water; D013213:Starch; D000077215:Clay
keywords: Halloysite nanoclay, Starch film; Mechanical properties