سال انتشار: ۱۳۹۰

محل انتشار: بیستمین کنگره ملی علوم و صنایع غذایی

تعداد صفحات: ۹

نویسنده(ها):

Saeed Dadashi – Department of Food science, Engineering and Technology, Faculty of Agricultural Engineering and Technology, University of Tehran, P.O. Box 4111, Karaj 31587-77871, Iran
Seyed Mohammad Mousavi1 –
Zahra Emam-Djomeh –
Abdulrasoul Oromiehieb2 – 2Iran Polymer and Petrochemical Institute, Pazhoohesh Street, P.O. Box 14965/159, Tehran, Iran

چکیده:

PLA-based Nanocomposites containing different amounts of C20A were prepared using a solvent casting method and their physical, thermal, barrier and structural properties were examined. Differential scanning calorimetry (DSC) has determined that the glass transition temperature (Tg) and degree of crystallinity (c%) were significantly influenced by the presence of C20A. Tg of neat PLA was 53.83 °C which with the addition of 3, 5 and 7 percent of C20A, increased to 57.55, 59.16 and 60.48 °C, respectively. The water vapor permeability (WVP) of the nanocomposites compared to neat PLA was reduced by approximately 12-50 % by adding 3-7% C20A. AFM images were used to evaluate the surface morphology (qualitative parameter) and roughness (quantitative parameter) of PLA films. Neat PLA had smoother surfaces and a lower roughness parameter (Sa). This study indicates that PLA/nanoclay composites could be used for packaging and other applications