Novel Antibacterial Hydrophilic Hard Coating Containing New Designed Antibacterial Agent

Because of current global explosive chain of COVID-19, the development of safe and durable antimicrobial surface coating becomes more important in various areas. This study presents the development of newly designed and synthesized novel coating material having multifunction including antimicrobial, high hardness and self-cleaning property of the coated surface. The antibacterial monomer was synthesized via quaternization with 1-bromo hexane after the reaction between Glycidyl Methacrylate and 4-Amino Pyridine. This monomer was able to be also polymerized either by heat or by UV. To make the optimal composition of the coating material, various composition ratios of polyfunctional monomers, monofunctional monomers, hydrophilic monomers and hydrophobic monomers were tested. The coated layer on ABS (Acrylonitrile-Butadiene-Styrene resin) sheet surface after UV curing process revealed excellent surface hardness (&gt;8H @ 1.0kgf), high optical transparency (&gt; 90% @ 550nm on 100um PET film), surface hydrophilicity (water contact angle &lt; 40^o), and high antibacterial property (99.9% for <i>staphylococcus aureus</i> & <i>escherichia coli</i>) that was tested by the film adhesion method (JIS Z 2801 Test for Antimicrobial Activity of Plastics). The excellent durability of the antibacterial property of coated layer even after the immersion in water at high temperature (50 degrees C) for 3 days was also shown without any surface damage. Due to its excellent surface properties, this novel multifunctional coating can be expected to be applied in various fields including appliances, medical devices and optoelectronics.