Search results for " PVC"
showing 3 items of 3 documents
PVC silver zeolite composites with antimicrobial properties
2011
Poly(vinyl chloride) (PVC) composites containing increasing amounts (2-20%, w/w) of silver zeolite (SZ) were prepared by melt mixing and characterized by thermal, mechanical and rheological analyses. The addition of large amount of SZ did not influence the processability and the formability of the composites, if compared to neat plasticized PVC. The antibacterial activity of PVC SZ composites was tested on Escherichia coli and Staphylococcus epidermidis and resulted promising both in culture broth and on agar plate and also in sterile urine seeded with these strains, for simulation purposes. In sterile urine, composites induced a significant reduction (4-6 log units) of viability of both st…
Metodo per la preparazione di nanocompositi antibatterici
2019
La presente invenzione riguarda un materiale polimerico con proprietà antibatteriche e antifungine, detto materiale polimerico avente adeso sulla sua superficie un nanomateriale costituito da nanotubi di allosite (HNTs) antimicrobici. Un tale materiale polimerico antimicrobico/antifungino viene preparato attraverso l’applicazione di un metodo procedurale semplice ed economico. Oltre che l’evidente applicazione in campo biomedicale, le caratteristiche metodologiche di questa invenzione ne consentono la diffusione in vari ambiti applicativi comuni, come ad esempio l’active food packaging. Il trattamento proposto prevede 10 l’introduzione di una modifica solo superficiale del PVC e può quindi …
Study of Atrp Process for the Grafting of Vinyl Monomers on PVC and PVDF
2014
STUDY OF ATRP PROCESS FOR THE GRAFTING OF VINYL MONOMERS ON PVC AND PVDF Sonia Lanzalaco, Onofrio Scialdone, Alessandro Galia, Rosalia Mauro, Flavia Lazzano Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica, Viale delle Scienze, Palermo e-mail: sonia.lanzalaco@unipa.it ATRP (atom transfer radical polymerization) has been recently used to prepare graft copolymers with regularly-spaced polymer chains from polymeric macroinitiators that have pendant chemical groups containing radically transferable halogen atoms [1]. The halogen atom serves as initiation site for the polymerization of side chains. Furthermore, Matyjaszewsky and Gennaro showed that an externally applied ele…