Waterborne polyurethane magnetic nanocomposites

V. MUCCI; C. MEIORIN; M. E: V. HORMAIZTEGUI; M. I. ARANGUEN; S. L. SCHERZER; M. A. MOSIEWICKI

Los Cocos, Cordoba

Simposio; XII Simposio Argentino de Polímeros,; 2017

Waterborne polyurethanes (WBPUs), unlike traditional PUs, do not require the use of organic volatile compounds for its dispersion, therefore they stand as a great alternative and can replace polymeric matrices traditionally used, that require in their synthesis or later, the dispersion of organic volatile solvents. A very versatile precursor for obtaining WBPUs is polycaprolactone (PCL diol) [1]. In addition to diol and di-isocyanate, the synthesis involves the use of carboxylic acid and amine; the most used are dimethylpropionic acid (DMPA) and triethylamine. The formation of a salt is the reason why the matrices are soluble in water. The WBPUs have a wide application in fabrication of electrical devices, adhesives, coatings, membranes and in biological applications [2,3]. However, the thermal stability, insolubility, and the mechanical properties of WBPUs are still lower than those of PUs soluble in organic solvents and need to be improved. For that reason, the addition of nanoparticles in their formulations can be an effective strategy to modify and improve theproperties [4]. Within the various nanoparticle systems, those who are sensitive to an external magnetic field are part of a new generation of materials with multiple applications in biomedicine and biotechnology. In particular, the use of magnetic nanoparticles in different polymers has received great attention in recent years due to their non-toxic nature, biocompatibility and the multiple applications that can be derived from the use of these materials as well as the easy preparation. The aim of this work,is to synthesize and characterize a PCL based WBPU and nanoparticles of magnetite to be combined in the preparation of novel magnetic nanocomposites.