3 documents found, page 1 of 1
Antimicrobial pullulan derivative prepared by grafting with 3-aminopropyltrimet...
Fernandes, Susana C. M.; Sadocco, Patrizia; Causio, Jessica; Silvestre, Armando J. D.; Mondragon, Inaki; Freire, Carmen S. R.In the present work, we propose a simple and straightforward procedure to prepare antibacterial transparent pullulan films by functionalization of pullulan powder with 3-aminopropyltrimethoxysilane. The introduction of active aminopropyl groups into the pullulan polymeric backbone imparts antimicrobial activity against Gram-positive (Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli). In addit...
Antibacterial paper based on composite coatings of nanofibrillated cellulose an...
Martins, Natercia C. T.; Freire, Carmen S. R.; Neto, Carlos Pascoal; Silvestre, Armando J. D.; Causio, Jessica; Baldi, Giovanni; Sadocco, PatriziaNew composites of nanofibrillated cellulose (NFC) and ZnO nanoparticles (NP) have been prepared by electrostatic assembly in aqueous medium and using polyelectrolytes as macromolecular linkers. Selected NFC/ZnO systems were employed as fillers in starch based coating formulations for Eucalyptus globulus-based paper sheets. Using this method, antibacterial paper with low content of ZnO (<0.03%) and slight improv...
Electrostatic assembly of Ag nanoparticles onto nanofibrillated cellulose for a...
Martins, Natércia C. T.; Freire, Carmen S. R.; Pinto, Ricardo J. B.; Fernandes, Susana C. M.; Neto, Carlos Pascoal; Silvestre, Armando J. D.Nanofibrillated cellulose offers new technological solutions for the development of paper products. Here, composites of nanofibrillated cellulose (NFC) and Ag nanoparticles (NP) were prepared for the first time via the electrostatic assembly of Ag NP (aqueous colloids) onto NFC. Distinct polyelectrolytes have been investigated as macromolecular linkers in order to evaluate their effects on the building-up of Ag...