Development of wollastonite-poly(ethylmethacrylate co-vinylpyrrolidone) based materials for multifunctional devices.
The manufacturing of a composite made of a synthetic bioactive ceramic, pseudowollastonite (psW), and a bioresorbable copolymer ethylmethacrylate-vinylpyrrolidone (EMA/VP) is presented in this article. psW porous blocks were produced by dipping an open porous polyurethane foam in a psW containing slurry. A 40/60 wt % EMA/VP monomers mixture was poured on the blocks, and free radical polymerization initiated by azobis(isobutyronitrile) at 50 degrees C. Disks of 1 mm height were obtained by cutting the composite with a diamond saw, and bioresorption and bioactivity of the specimens were tested by immersion of the disks into SBF. A ceramic/polymer weight ratio of 72/28, greater than the usually achievable ratio by polymeric solidification of slurries of monomers charged with a powdered solid component, has been obtained. The system is bioactive and does not change the pH of the medium during the degradation test.
Rodríguez-Lorenzo
Luis M
LM
ICTP-CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain. rodriguez-lorenzo@ictp.csic.es
Carrodeguas
Raúl García
RG
Rodríguez
Miguel A
MA
De Aza
Salvador
S
Parra
Juan
J
Román
Julio San
JS
D001672:Biocompatible Materials / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D004864:Equipment and Supplies; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D008768:Methylmethacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D017640:Silicates / Q000737:chemistry*; D012996:Solutions; D013818:Thermogravimetry; D014961:X-Ray Diffraction
D001672:Biocompatible Materials; D017610:Calcium Compounds; D008768:Methylmethacrylates; D017640:Silicates; D012996:Solutions; C009931:poly(ethylmethacrylate); C031293:calcium silicate