To control the corrosion rate, the Magnesium (Mg) was coated with poly (l-lactic acid) (PLLA) using electrospinning
technique. The effectiveness of the PLLA coating on the high purity Magnesium (HP Mg) and alloy AZ91 were tested in
Hank’s solution immersion test. The corrosion behaviour of Mg coated PLLA was studied through hydrogen evolution,
weight loss and scanning electron microscope (SEM) before, during and after samples were immersed. The solution
was maintained at pH 7 by bubbling CO2
gas. The results showed that surface treatment on Mg by coating with PLLA
had reduced the rate of corrosion during the immersion test. The PLLA coating was also characterized and the coating
adhesion was evaluated.
Chitosan/polyvinyl alcohol (Chitosan/PVA) blended film was prepared by direct blend process and solution casting methods.
In order to reduce the swelling ratio and enhance the chemical and mechanical stability, Chitosan/PVA film was crosslinked
with glutaraldehyde in order to produce Chitosan-g-PVA. Bovine serum albumin (BSA) was used as a model protein
to incorporate into the Chitosan-g-PVA. The chemical structure and morphological characteristics of films were studied
by FT-IR and scanning electron microscopy (SEM). Mechanical and physical properties of blended films such as tensile
properties in the dry and wet states, water uptake and water contact angle measurement were characterized. Blending
PVA and chitosan improved strength and flexibility of the films. Crosslinking with glutaraldehyde further improves the
tensile strength and decrease the hydrophilicity of films. BSA immobilized on the Chitosan-g-PVA film was calculated as
BSA encapsulation efficiency.