Bioartificial materials based on collagen: 1. Collagen cross-linking with gaseous glutaraldehyde

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Abstract
The effect of exposure time of thin films of soluble collagen to glutaraldehyde (GTA) vapour was studied at 37°C, and was evaluated by examining the thermal and biological stability and the swelling ratio. It was found that the collagen films treated with GTA vapour for 18 h showed the highest denaturation temperature, the lowest swelling ratio, and an enhanced proteolytic stability. This study shows that soluble collagen can be effectively cross-linked with GTA vapour and that the degree of cross-linking can be controlled by varying the exposure time.