The International Institute for Science, Technology and Education (IISTE)
Abstract
Bionanocomposites from biopolymers and inorganic nanoparticles are of great interest for packaging materials due to their enhanced physical, thermal, mechanical, and processing characteristics. In this study polylactic acid and titanium oxide ( PLA/TiO2 ) films were prepared by casting method. The effect of structural, mechanical , thermal, and barrier properties of the nanocomposites were studied . Fourier transform infrared spectroscopy confirmed that no change in bonds of PLA /TiO2. Increased glass transition temperature and thermal stability, compared with pure PLA. Mechanical properties (Tensile strength, Young Modulus) increased when add 1, 3,and 5wt% TiO2 compare with PLA(2.3, 2.5, 2.8 and 3)Gpa. Barrier properties (oxygen transmission rate) was decrease when the concentration of TiO2 is increased in PLA/TiO2 film as (18, 16, and 14) cm3.mm/m2.day.atm, compare with neat PLA was 20 cm3.mm/m2.day.atm Key Words: Biodegradable, polylactic acid , titanium oxide , mechanical properties , thermal , and barrier properties
