Structure and properties of milk protein/PVA blend fiber

Configuration of milk protein/PVA fiber was observed by SEM, and the result showed that milk protein/PVA fiber was a profile-fiber with little holes in its section and grooves in its surface. Analysis of X-ray diffraction indicated that milk protein/PVA fiber was composed of crystal portion, where PVA arranged regularly, and amorphous portion of milk protein. The evidence from the measurement of moisture adsorption demonstrated that peptide chain molecules in the amorphous region of milk protein/PVA contributed mostly to its good hygroscopicity. The stress-strain curve for milk protein/PVA fiber was similar to that of vinylon fibers, indicating the crystallization of PVA play a major role for excellent mechanical properties of milk protein/PVA fibers.