title: Influence of beta-radiation sterilisation in properties of new chitosan/soybean protein isolate membranes for guided bone regeneration.
abstract: Novel chitosan (cts) and soybean protein isolate (SI) blended membranes were prepared. These membranes were produced by solvent casting. Besides combining the advantages of both materials, cts/SI membranes exhibit a biphasic structure that will eventually originate in situ porous formation, through a two-step degradation mechanism. In this particular work the effect of beta-radiation over the properties of these membranes was evaluated. beta-radiation sterilisation was performed at three different doses (25, 50 and 100 kGy) and eventual surface chemical changes were evaluated by Fourier transformed infrared--with attenuated total reflection and contact angle measurements. Moreover, eventual bulk properties changes due to beta-radiation were assessed by means of mechanical tensile tests and water uptake measurements. In general, no substantial changes were detected on the studied properties, with the exception of the surface energy that was found to be slightly increased for higher applied doses.
authors.affiliation: 3Bs Research Group, Biomaterials, Biodegradables, Biomimetics, Campus de Gualtar 4710-057 Braga, Portugal. ricardosilva@dep.uminho.pt
authors.forename: R M
authors.initials: RM
authors.lastname: Silva
authors.forename: C
authors.initials: C
authors.lastname: Elvira
authors.forename: J F
authors.initials: JF
authors.lastname: Mano
authors.forename: J
authors.initials: J
authors.lastname: San Román
authors.forename: R L
authors.initials: RL
authors.lastname: Reis
mesh_terms: D001610:Beta Particles; D001672:Biocompatible Materials / Q000737:chemistry / Q000528:radiation effects; D001861:Bone Regeneration; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000528:radiation effects*; D048271:Chitosan; D004548:Elasticity / Q000528:radiation effects; D008422:Materials Testing; D008567:Membranes, Artificial; D008970:Molecular Weight; D011487:Protein Conformation / Q000528:radiation effects; D030262:Soybean Proteins / Q000737:chemistry* / Q000528:radiation effects*; D013242:Sterilization / Q000379:methods*; D013499:Surface Properties; D013718:Tensile Strength / Q000528:radiation effects; D023822:Tissue Engineering / Q000379:methods; D014867:Water / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D008567:Membranes, Artificial; D030262:Soybean Proteins; D014867:Water; D002686:Chitin; D048271:Chitosan