Preparation method of high-performance carbon fiber thermal insulation cylinder

The invention discloses a preparation method of a high-performance carbon fiber thermal insulation cylinder. Belongs to the field of thermal-insulation cylinder preparation. The preparation method comprises the following steps: providing a carbon fiber precursor, and cutting the carbon fiber precursor into short carbon fibers by a chopping machine; pretreating the chopped carbon fibers; immersing the chopped carbon fibers into a softener containing ester oil for pretreatment; the pretreated short carbon fibers are carded into a web by a carding machine, then the web and long fibers are needled to prepare unidirectional cloth, and the web and the unidirectional cloth are compounded to obtain a preform; carrying out vapor deposition densification on the preform, then carrying out resin impregnation and carbonization densification, and then carrying out high-temperature purification to obtain the high-performance carbon fiber thermal insulation cylinder; wherein the ester oil is prepared from pinonic acid and di