Assessing the Time Dependence of AOPs on the Surface Properties of Polylactic Acid

Abstract Plastics are artificial synthetic organic polymers that have been used in every area of daily life. However, because their slow degradation rate, use is contentious. The treatment the surface sample considered necessary as enzymatic or bacterial attach not possible if plastic environment ideal. main topic this work investigation effect different advanced oxidation processes (AOP) on near structure polylactic acid (PLA) samples, which, turn, can promote adhesion enzymes bacteria for further biodegradation. Advanced Oxidation Processes Ultrasonication, UV photodegradation and Dielectric Barrier Discharge (DBD) plasma. After treatments, surfaces were characterized by Infrared Spectroscopy (IR), Drop Contact Angle (DCA), Confocal Laser Scanning Microscopy (CLSM) X-ray Photoelectron (XPS). Both ultrasonic treatments a significant impact properties immersed PLA removing oxygen-containing groups polymer chain, albeit ways, while plasma tends to uncover oxygen surface. influence pre-treatment improving has proven using pseudomonas knackmussii strain.