INFLUENCE OF TREATMENT BY ORGANIC COMPOUNDS ON AMORPHOUS-CRYSTALLINE STRUCTURE OF DERMA COLLAGEN

To study the influence of treatment by organic compounds on the amorphous-crystalline structure of the derma collagen, a number of physical-chemical methods were used including TGA, DTA and DSC. The investigation of the derma collagen after treatment by organic compounds on the mezoscopic and microscopic levels are indicative that methods of organic-mineral tanning provides to shaping a thermo stable systems of the tanning agents in structure of the derma collagen. The use of glutaraldehyde and phosphonium compounds instead of chromium compounds before vegetable-aluminium tanning gives a more ordered structure of derma collagen due to formation of cross-linking, and foremost covalent, bonds in the interface space. The pretanning of leather with both glutaraldehyde and phosphonium compounds before vegetable tanning helps steady diffusion into the derma structure, which gives microstructure with uniform, moderately dense arrangement of quite full bundles of collagen fibres.