The method comprises the following steps: dissolving
lipoic acid and a
drug in an
organic solvent to form a homogeneous solution, dropwise adding deionized water while stirring, then adding a
reducing agent, initiating
lipoic acid polymerization and
drug co-
assembly in situ at 20-40 DEG C to form a
drug-loaded
micelle solution, and carrying out
freeze drying on the drug-loaded
micelle solution to obtain the nano-preparation drug based on polylipoic acid. And dialyzing and purifying to obtain the nano preparation
medicine based on polylipoic acid. The preparation method is characterized in that
lipoic acid has dual characteristics of a
drug carrier matrix and a dynamic crosslinking
monomer, carrier synthesis and efficient
drug encapsulation are synchronously realized through one-step in-situ
polymerization-co-
assembly, and the technical
bottleneck that a traditional nano-carrier needs pre-synthesis and step-by-step drug loading is broken through. The method has the following practicability: (1) the process is simple and efficient, complex equipment is not needed, and
reaction conditions are mild; (2) the drug loading performance is excellent, and the particle size is uniform and adjustable (50-300 nanometers); (3) a polylipoic acid skeleton endows the nano-drug preparation with environmental responsiveness, and intelligent
drug release can be realized; and (4) the method is suitable for hydrophobic drugs and compound preparations. The method provides a high-load, high-stability and stimuli-responsive nanocrystallization solution for
hydrophobic drug delivery, and has application value in the field of nano-medicines.