LDPE/EVA Composites for Antimicrobial Properties
An approach to develop PE composite containing silver microparticles to have an antimicrobial effect is presented. To obtain such antimicrobial composites, LDPE/EVA were processed with Ag particles on TiO2 particles as inorganic carrier substance. Titanium dioxide nanoparticles (P-25) were covered with silver particles using Turkevich Method or citrate reduction method. The Ag/TiO2 particles were dispersed at concentration of 0,8 wt% and 1% wt% in LDPE/ethylene vinyl acetate copolymer (EVA)–(50% w/w) at the melt state in a Haake torque Rheometer. Silver microparticles were characterized with UV-Vis Spectroscopy. The composites thus prepared were characterized through XRD, Ares Rheometer, Scanning Electronic Microscopy (SEM) and JIS Z 2801 antimicrobial tests to study the effects of the addition of particles on rheological properties, morphological behavior and antimicrobial properties. The results showed that incorporation of silver/titanium dioxide particles on composites obtained systems with differents dispersions. The Ag/TiO2 particles showed uniform distribution of Ag on TiO2 particles as observed by SEM-EDX and antimicrobial tests according to JIS Z 2801 shows excellent antimicrobial properties.
Document Type: Research Article
Affiliations: 1: Department of Materials Engineering-Polymers,Federal University of São Carlos Via Washington Luiz, Km 235, 13565-905São Carlos,SP, Brazil 2: Department of Natural Resources, College of Agricultural Sciences,São Paulo State University (UNESP), SP,18610-307, Brazil 3: Trent Centre for Biomaterials Research, Trent University, Peterborough, ON, K9J 7B8, Canada
Publication date: May 3, 2012