Structure And Properties Of Flax Fiber Modified With Protein

In this paper, oxidation of cellulose with sodium periodate leads to yield a product with 2,3-dialdehyde cellulose. The aldehyde groups own the ability to crosslink with protein directly, therefore the protein flax fiber are successfully prepared. There is no chemical crosslinking reagents on the whole process, which can be in keeping with the need of people about greenness and environment protection.With enchancement of concentration of NaIO4, oxidized time and oxidized temperature, content of aldehyde groups increased. However, the weigh loss of flax fiber increased and breaking strength decreased. Oxidation of cellulose with sodium periodate yielded aldehyde groups. The surface of flax fiber became rough and crystallinity decreased while increasing oxidized degree of flax fiber.The structure and properties of the proteinic oxidized flax fiber were studied. The results showed that the weight gain of the oxidized flax fiber was affected by the concentration of protein solution, pH value, treated time and treated temperature. However, little change was found on the breaking strength and the breaking elongation of the oxidized flax fiber treated with protein. The covalent bonds occurred between the oxidized flax fiber and protein. The surface of oxidized flax fiber became smooth. The crystallinity changed little after treated with protein solution. Compared with original flax fabric, wrinkle resistance, water absorbency and anti-UV properties of protein flax fabric are promoted.