The invention discloses a silk
fibroin micro-needle
system, a silk
fibroin nanometer particle and a preparation method thereof. The dissolvable silk
fibroin micro-needle
system comprises a base plate and a micro-needle, and is characterized in that a body of the micro-needle consists of silk fibroin
protein condensate, the silk fibroin
protein condensate penetrates into the
skin of a user, and micro-pipes are remained on the
skin of the user after the silk fibroin
protein condensate is dissolved. The silk fibroin
nanometer particle is characterized by comprising silk fibroin
protein molecules and cosmetic molecules or
medicine molecules, the silk fibroin
protein molecules wrap the cosmetic molecules or the
medicine molecules to form a particle structure,
antibody or
aptamer molecules can be attached onto the surface of the silk fibroin
nanometer particle, and the degradation speed of the silk fibroin nanometer particle in the body of the user can be controlled by means of adjusting crystalline degree of silk fibroin protein. A method for delivering
medicine or cosmetic is characterized by comprising steps of penetrating the silk fibroin protein condensate of the body of the micro-needle into the
skin of the user, dissolving the silk fibroin protein condensate, and releasing nanometer silk fibroin particles wrapped with the medicine or the cosmetic so that the medicine molecules or the cosmetic molecules are delivered; or delivering the medicine molecules or the cosmetic molecules via the micro-pipes remained on the skin of the user after the silk fibroin protein condensate is dissolved in a
permeation manner, and the like.