Thermal Transition of Gelatin Microspheres with and Without Glutaraldehyde-Crosslinking

doi:10.7517/j.issn.1674-0475.2009.05.334

Abstract

Abstract: Thermal transition of gelatin microspheres(GMs) and glutaraldehyde-crosslinked gelatin microspheres(CGMs) in both air and nitrogen atmosphere were studied in this paper,and gelatin-based materials with porous core were produced from GMs heat-treated at 250 ℃.The specimens were characterized by the thermal gravimetric analysis(TGA),differential scanning calorimetry(DSC),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS) and fourier transform infrared spectroscopy(FTIR).It was found that CGMs had an equal slight weight loss more than GMs from 300 ℃ in either air or nitrogen atmosphere,and the melting temperature(Tm) of GMs and CGMs are both at 228 ℃.A foam-like core/solid shell structure was formed from acid-treating GMs which were heat-treated for 7 h in air,and the dominant elements of the core are carbon and oxygen while the shell consists of carbon.GMs had not undergone any chemical reaction by heat-treating at 105 and 190 ℃.Heat-treating at 250 ℃ caused the amount decreasing of amide bond and tertiary structure transformation in gelatin molecule.

Key words: gelatin, thermal transition, foam-like structure

CLC Number:

TQ57

GE Jun, SUN Rui-xue, SHI Jing-jing, ZHANG Bing, CHEN Li-juan. Thermal Transition of Gelatin Microspheres with and Without Glutaraldehyde-Crosslinking[J]. Imaging Science and Photochemistry, 2009, 27(5): 334-341.

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