The invention discloses a preparation method of an elastic warm-keeping woolen fabric, and relates to the technical field of fabrics. Disulfide bonds among
wool fabric
fiber peptide chains are opened by utilizing hydrothioacetic acid under the assistance of high temperature, so that
binding force among molecules is reduced, then the disulfide bonds are randomly combined under the action of an
oxidizing agent to form a curled state, the fabric is indirectly endowed with the elastic property, and the warm-keeping and breathable effects are achieved; then,
plasma is used for generating an
etching effect on the
fiber surface, scales are stripped,
oxygen-containing and
nitrogen-containing polar groups are introduced, so that the elastic deformation capacity of the
fiber is improved, more grooves are formed in the fiber surface along with the increase of the pressure intensity, then nano-
zinc oxide is used for filling, and a soybean
hollow fiber membrane is compounded, so that the elastic deformation capacity of the fiber is improved. Meanwhile, the
zinc oxide particles are fixed on the woolen cloth fibers,
infrared rays of a
human body are shielded, heat loss is reduced, and therefore the heat retention property of the fabric is improved.