Supramolecular structure of wool
The main factor of wool fiber is the cortical layer composed of cortical cells. Woolfelt cortical cells contain both high-sulfur and low-sulfur proteins. The former is the main component of the matrix and its molecular chain is amorphous; the latter has a helical structure and forms the basic fibrils in the cortical cells. o The basic fibrils reconstitute the microfibrils, and the microfibrils further compose the fibrils. All kinds of fibrils are embedded in the tomb, and the fibrils and the assay can be connected by disulfide bonds. Some research data indicate that the fibrils in the cortical cells have a diameter of about 0.25 m, the diameter of the microfibrils is 7.5 nm (75 A), and the diameter of the basic fibrils is about 2 nm (20 persons).
The structure of the basic fibrils is not yet clear, but it is generally considered as shown in Figure 4-5. The basic fibril is composed of three helices of low-sulfur proteins with a helix structure, such as cords, which are a-folded. The multiple bonds between the skin chains are relatively stable. "The basic fibrils of the roots are arranged more regularly and form micro fibrils.