Nanofibers with diameters between 100 nm to 200 nm were easily prepared
from various water-soluble marine polysaccharides by combining ultrasonic
atomization with freeze casting. Scanning electron microscopy demonstrated
considerable differences in fiber diameter and morphology between the types as well as
the concentrations of polymers. Nanofibers with uniform orientation were obtained by
rapid freezing. The anti-bacterial activity of chitosan nanofibers is suitable for their use
as food packaging material. Biodegradable composites of chitosan nanofibers and
cellulose paper could be a solution to the problem of ocean pollution from single-use
petroleum-based plastics.
Keywords: Freeze casting, Nanofiber, Polysaccharides.