The embodiment of the invention provides a self-powered microneedle patch for repairing
hypertrophic scars as well as a preparation method and application of the self-powered microneedle patch. The self-powered microneedle patch comprises: a friction nano-generator for generating a current; the conductive
drug-loaded microneedle patch is connected with the friction nano-generator, and the friction nano-generator is connected with the conductive
drug-loaded microneedle patch; the conductive
drug-loaded microneedle patch comprises a conductive microneedle patch body and a crosslinked
gelatin-crosslinked
hyaluronic acid microneedle bearing Sb4. The surface of the conductive micro-needle patch is provided with a
metal coating, and the conductive micro-needle patch is used for mediating current generated by the friction nano-generator and applying
percutaneous electrical stimulation; the cross-linked
gelatin-cross-linked
hyaluronic acid microneedle is coated at the tip of the conductive microneedle patch. According to the self-powered microneedle patch provided by the embodiment of the invention, myofibroblasts of
hypertrophic scars are transdifferentiated into adipocytes by providing
percutaneous electrochemical stimulation, inflammatory factor release is inhibited, and a tissue microenvironment is remodeled, so that the
hypertrophic scars are reversed, and
skin repair and tissue regeneration are realized.