The invention relates to the technical field of
biomimetic materials, in particular to a preparation method of special fibers specially imitating
animal wool, which comprises the following steps: firstly, mixing silk
fibroin and
bacterial cellulose, adding a flexible cross-linking agent, preparing a composite
aerogel core layer material with an oriented porous structure through bidirectional freezing and cross-linking curing, and dispersing into a
spinning solution; the preparation method comprises the following steps: firstly synthesizing a core layer
spinning solution, then synthesizing a polysebacic
glyceride prepolymer, carrying out hydrophilic modification on the polysebacic
glyceride prepolymer, preparing a shell layer
spinning solution, finally co-spinning the core layer solution and the shell layer solution through a coaxial spinning technology, and carrying out coagulating bath and thermal crosslinking treatment to obtain the special
fiber with the bionic core-shell structure. The
fiber is extremely low in dry-state
thermal conductivity due to the core layer
aerogel, the
fiber is endowed with a
humidity-responsive intelligent temperature regulation function due to the hydrophilic property of the core layer
aerogel, and the fiber has
low density and high
mechanical strength and can conveniently integrate multiple functions such as shape memory and
antibiosis.