Preparation Of Collagen Protein/PVA Composite Fiber And Its Structure And Properties

The utilization of wastes and environmental protection are two main aspects deeply concerned by people all over the world. In China every year leather industry produces an astonishing large number of solid residues which contain rich of collagen. If these residues are left untreated, great damage to our environment may be caused. It may result in the waste of natural resources to a great extent as well. However, if some researches on the development and use of these wastes are conducted, both problems may be solved successfully. In light of these aims, we started this study regarding the composite fiber of poly vinyl alcohol (PVA) and collagen protein which extracted from chrome shavings.Firstly, collagen protein was extracted by the method of MgO from chrome shavings and molecular weight distribution of the product was investigated by SDS-PAGE. Such factors as the temperature of reaction, the reaction time and the amount of MgO used affecting the yield of collagen protein and its molecular weight were investigated Analysis of physical and chemical characteristics of the products was also conducted. Results showed that the yield of collagen protein gradually increased with the growth of the temperature of reaction, the reaction time and the amount of MgO used, while molecular weight distribution of collagen protein decreased. The optimal condition of preparing collagen protein was obtained, that is, temperature of reaction 75℃, reaction time 8h, and the amount of MgO 6.0%. It was also shown that following above conditions, both high yield ( 41.2%)and appropriate molecular weight distribution of collagen protein(44.3～97.2KDa) were achieved, which could be applied for the preparation of protein fiber.Secondly, the homogeneous and stable spinning solution of collagen protein...