Encontrados 8 documentos, a visualizar página 1 de 1
Release of volatile compounds from polymeric microcapsules mediated by photocat...
Marques, Juliana Filipa Gouveia; Oiveira, L. Filipa; Pinto, Renato; Coutinho, Paulo J. G.; Parpot, Pier; Gois, J. R.; Coelho, J. F. J.; Magalhães, F. D.In this study we propose a suitable method for the solar-activated controlled release of volatile compounds from polymeric microcapsules bonded with photocatalytic nanoparticles. These reservoirs can find applications, for example, in the controlled release of insecticides, repellents, or fragrances, amongst other substances. The surfaces of the microcapsules have been functionalized with TiO2 nanoparticles.Upo...
Surface modification and characterization of thermoplastic polyurethane
Alves, P.; Coelho, J. F. J.; Haack, Janne; Rota, Astrid; Bruinink, Arie; Gil, M. H.http://www.sciencedirect.com/science/article/B6TWW-4VP4TNJ-1/2/26b1d7dd60ae5bcab0cfe30ac2771c06
Development of a new photocrosslinkable biodegradable bioadhesive
Ferreira, P.; Coelho, J. F. J.; Gil, M. H.Adhesives provide a needle-free method of wound closure and do not require local anaesthetics. Polymeric adhesives have been used for about 3 decades for joining several tissues of the organism. Also, they can accomplish other tasks, such as haemostasis and the ability to seal air leakages and have the potential to serve as delivery systems. ; http://www.sciencedirect.com/science/article/B6T7W-4R0KT3T-3/1/6b...
Photocrosslinkable starch-based polymers for ophthalmologic drug delivery
Vieira, A. P.; Ferreira, P.; Coelho, J. F. J.; Gil, M. H.http://www.sciencedirect.com/science/article/B6T7J-4SP3SR2-2/2/1abf792ee95f87953786988e17f46e73
Modification of the biopolymer castor oil with free isocyanate groups to be app...
Ferreira, P.; Pereira, R.; Coelho, J. F. J.; Silva, António F. M.; Gil, M. H.Surgical adhesives have been used for several applications, including haemostasis, sealing air leakages and tissue adhesion. The aim of this work was to develop a biodegradable urethane-based bioadhesive containing free isocyanate groups. This material presents the advantage of being biodegradable, biocompatible and having the capacity of reacting with amino groups present in the biological molecules. ; http...
Synthesis and characterization of a poly(ethylene glycol) prepolymer to be appl...
Ferreira, P.; Coelho, J. F. J.; Pereira, R.; Silva, António F. M.; Gil, M. H.Surgical adhesives can be applied to wound closure and to covering and protecting surface wounds. Depending on their degradability, they can then slough off or can be reabsorbed by the organism when the wound initiates the healing process. In this work, we intended to develop a new urethane-based bioadhesive that could accomplish these purposes. Urethanes are considered to be promising candidates as adhesives b...
Synthesis and characterization of membranes obtained by graft copolymerization ...
Santos, K. S. C. R. dos; Coelho, J. F. J.; Ferreira, P.; Pinto, I.; Lorenzetti, S. G.; Ferreira, E. I.; Higa, O. Z.; Gil, M. H.Chitosan based membranes to be applied on wound healing as topical drug delivery systems were developed by graft copolymerization of acrylic acid (AA) and 2-hydroxyethyl methacrylate (HEMA) onto chitosan using cerium ammonium nitrate as chemical initiator. Evidence for graft copolymerization of the vinyl monomers onto chitosan was obtained by FTIR and DMTA. Swelling degree, cytotoxicity, thrombogenicity and hae...
Thermal Characterization of Chitosan-Grafted Membranes to be Used as Wound Dres...
Ferreira, P.; Coelho, J. F. J.; Santos, K. S. C. R. dos; Ferreira, E. I.; Gil, M. H.Six different membranes previously prepared by the authors by graft copolymerization of acrylic acid (AA) and 2-hydroxyethylmethacrylate (HEMA) onto chitosan were characterized. The graft copolymerization of the vinyl monomers onto chitosan was confirmed by FTIR and DMTA. The chitosan used was also characterized by DMTA, which allowed addressing some questions related to the typical thermal transitions of this ...
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