Anionic Collagen: Polymer Composites with Improved Dielectric and Rheological Properties

• Published in: Artificial organs 1998-03, Vol.22 (3), p.203-209
• Main Authors: Goissis, Gilberto, Piccirili, Luciana, Goes, Julio Cesar, De Guzzi Plepis, Ana Maria, Das-Gupta, Dilip K.
• Format: Article
• Language: English
• Subjects: Anesthetics - chemistry; Anionic collagen; Anions; Biocompatible Materials; Calorimetry, Differential Scanning; Collagen - chemistry; Composites; Gels; Hydrocarbons, Fluorinated - chemistry; Polymers; Polysaccharides, Bacterial - chemistry; Properties; Rhamsan; Rheology; Spectrophotometry, Infrared; Vinyl Compounds - chemistry; Vinylidene fluoride-trifluorethylene
• ISSN: 0160-564X; 1525-1594
• DOI: 10.1046/j.1525-1594.1998.06109.x

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 × 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.