Document Type : Research Article

Authors

• Suresh Babu A ¹
• Rajiv G ²
• Ananda Kumar S ³

¹ Anna University Chennai , India

² Department of Chemistry, Faculty of Humanities and Sciences, Anna University, Chennai, India

³ Department of Chemistry, Faculty of Humanities and Sciences, Anna University, Chennai,India

Abstract

Although synthetic polymers offer excellent versatility in coating applications, due to
intrinsic permeability to gases and vapours, including, but not limited to, oxygen, carbon
dioxide, and organic vapours, their application is highly limiting. On the other hand, some
natural polymers render great alternative to synthetic polymers in such areas of research. In
this work, flexible polyurethane is used to make the PLA as flexible coating. Hence, our
present study is focussed on the development of PLA-PU hybrid organic polymer with the
incorporation of garnet waste powder (in-organic) as coatings deposited by brush-coating
method on mild steel. To overcome the brittle nature of the PLA, a small amount of
polyurethane having a rubbery nature is added along with garnet. The mechanical and barrier
properties significantly improved with the addition of a garnet (5%, 10%, and 15%) in
PLA-PU blends. The various characterization techniques like Fourier Transform Infrared
Spectroscopy (FTIR), Crosshatch test, contact angle, and morphological analysis by Scanning
Electron Microscopy (SEM) and Electrochemical Impedance and Salt-spray and Cross-hatch
adhesion tests are checked.

Keywords

• Corrosion,,
• ,،Coating,,
• ,،Biomaterials,,
• ,،Polylactic,,
• ,،Polyurethane

Main Subjects

• Biomaterials & Biodevices