Self-reinforced aramid composite material prepared by surface dissolution method as well as preparation method and application thereof

The invention belongs to the technical field of aramid composite materials, and discloses a self-reinforced aramid composite material prepared by a surface dissolution method as well as a preparation method and application thereof. The preparation method comprises the following steps: partially dissolving aramid in organic solvent, strong alkali and adjuvant at a certain temperature; taking out undissolved aramid; immersing the undissolved aramid in water for partial curing; and performing stable curing, cleaning and drying in a near-vacuum low-pressure environment to obtain the self-reinforced aramid composite material, wherein the organic solvent is of strong polarity, and the adjuvant is at least one of alkali metal salts or alkaline earth metal salts. The self-reinforced aramid composite material disclosed by the invention has the advantages of high temperature resistance, solvent resistance, high modulus, excellent mechanical properties, better strength in both transverse direction and longitudinal direc