Intrinsic high-thermal-conductivity polyformaldehyde fiber and preparation method thereof

The invention provides an intrinsic high-thermal-conductivity polyformaldehyde fiber and a preparation method thereof, and is characterized in that amide and hydrazide self-assembly nucleating agents with better compatibility with a polyformaldehyde matrix are introduced into the polyformaldehyde matrix, and a plurality of supramolecular structures such as fibrous structures, dendritic structures and the like are formed by self-assembly by utilizing the intermolecular hydrogen-bond interaction of the self-assembly nucleating agents in the heating and cooling processes of a polyformaldehyde melt, so that the intrinsic high-thermal-conductivity polyformaldehyde fiber is prepared. Further inducing polyformaldehyde molecules to generate epiphytic crystallization on the surface of the polyformaldehyde molecules to form a relatively ordered crystal structure; according to the preparation method, polyformaldehyde is taken as a raw material, polyformaldehyde molecule crystal orientation is promoted in the polyformald