Composite fibrid and preparation method thereof

The invention provides a composite fibrid and a preparation method thereof, and the preparation method comprises the following specific steps: adding nylon 66 slices into a solvent, heating and stirring to obtain a nylon 66 solution; adding para-aramid chopped fibers into the nylon 66 solution, heating and stirring to obtain an aramid/nylon 66 mixed solution; the aramid fiber/nylon 66 mixed solution is dropped into a coagulating bath for shearing, and aramid fiber/nylon 66 composite fibrid is obtained; the aramid fiber/nylon 66 composite fibrid is put into the modified carbon nanotube dispersion liquid for ultrasonic treatment, and finally the aramid fiber/nylon 66/carbon nanotube composite fibrid is obtained. The composite fibrid prepared by the invention can be used for preparing a paper-based composite material with higher mechanical properties, has certain conductivity, also shows good gas-sensitive property, and provides a new design thought for preparation of multifunctional sensing materials. 本发明提供了一种复