Model studies on chemical and textural modifications in gelatin films by reaction with glyoxal and glycolaldehyde.

The present study investigated chemically modified gelatin biopolymer films. Gelatin solutions were treated with glyoxal and glycolaldehyde, respectively, at concentrations ranging from 0.25 to 7.

Surface modification of tricalcium phosphate for improvement of the interfacial compatibility with biodegradable polymers.

The surface of tricalcium phosphate (TCP) filler particles was activated by treatment with dilute aqueous phosphoric acid. ATR-IR spectra indicated the formation of calcium hydrogen phosphate dihydrate at the surface. Oligo(lactone)s were formed by the subsequent reaction of the activated TCP with L-lactide and epsilon -caprolactone, respectively, at 150 degrees C without any additional catalysts.