title: Anionic collagen: polymer composites with improved dielectric and rheological properties.
abstract: This work describes the preparation and characterization of anionic collagen composites with rhamsan and vinylidene fluoride-trifluorethylene with improved rheological and dielectric properties without loss of collagen secondary structure with an interaction occurring between both macromolecules of the composites. On a comparative basis, the force needed for the extrusion of anionic collagen:rhamsan composites was in the range from 0.088 to 0.080 J compared to that for collagen of 0.189 J. Anionic collagen:vinylidene fluoride-trifluorethylene composites were characterized, in the case of the 1:1 composite, by a pyroelectric coefficient of 1.89 x 10(-4) cm(-2) K(-1), which was significantly higher than those determined under the same conditions for native anionic collagen and vinylidene fluoride-trifluorethylene.
authors.affiliation: Instituto de Química de São Carlos, Universidade de São Paulo, Brazil.
authors.forename: G
authors.initials: G
authors.lastname: Goissis
authors.forename: L
authors.initials: L
authors.lastname: Piccirili
authors.forename: J C
authors.initials: JC
authors.lastname: Goes
authors.forename: A M
authors.initials: AM
authors.lastname: de Guzzi Plepis
authors.forename: D K
authors.initials: DK
authors.lastname: Das-Gupta
mesh_terms: D000777:Anesthetics / Q000737:chemistry*; D000838:Anions; D001672:Biocompatible Materials; D002152:Calorimetry, Differential Scanning; D003094:Collagen / Q000737:chemistry*; D005782:Gels; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry*; D011108:Polymers; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D012212:Rheology; D013055:Spectrophotometry, Infrared; D014753:Vinyl Compounds / Q000737:chemistry*
chemical_list: D000777:Anesthetics; D000838:Anions; D001672:Biocompatible Materials; D005782:Gels; D006845:Hydrocarbons, Fluorinated; D011108:Polymers; D011135:Polysaccharides, Bacterial; D014753:Vinyl Compounds; C007384:1,1-difluoroethylene; D003094:Collagen; C071623:rhamsan; C074585:trifluoroethene