Background: Increased level of pollutions has led to the serious environmental problems and
given a way to develop the better biodegradable polymers. Soy-based polymers have been widely developed
and used for the packaging purposes, but these polymers were reported to be degraded due to the
high moisture absorptivity, which leads to the spoilage of the packed food at a quicker rate.
Aim: This research sheds a light on the preparation of soy-based polymer and nanocomposite having a
low absorptivity by a wet method using Palmitic Acid (PA).
Method: PA was added up to 30% by the weight of soy protein isolate, in addition glycerol was used as
the plasticizer and 25% PA was found to be the optimum. The polymer sheets were characterized by
Fourier Transform Infrared Spectroscopy, Thermal Gravimetric-DTA and Scanning Electron Microscopy
analyses. In addition, the moisture content and tensile studies were monitored. For the preparation of
nanocomposite, soy-based nanoparticles were synthesized by grafting.
Result: The generated nanocomposite has shown the reduced moisture absorptivity and higher mechanical