Preparation of chrysophanol loaded polybutylcyanoacrylate nanocapsules and its quality inspection / 中草药

ABSTRACT

Objective To optimize the preparation technology of chrysophanol loaded polybutylcyanoacrylate nanocapsules by interfacial polymerization,sieve the optimal technology conditions of preparation,and study its quality. Methods Based on the single factor experiment,the formulation was optimized by L9(34) orthogonal design with entrapment efficiency as reference index. The factors including agitating speed,pH value of aqueous phase,amount of ?-butylcyanoacrylate (BCA) and of ethyl acetate were screened. At last,its shape,particle size,the encapsulation efficiency,and the drug loading were investigated as its quality inspection. Results When the ammunt of chrysophanol was 5 mg,the optimum preparation conditions were established as followsthe agitating speed was 800 r/min,the pH value of aqueous phase was 2,the amount of ?-BCA was 13 ?L and ethyl acetate was 0.6 mL. Under this optimum condition,the mean entrapment ratio was 82.19%,and the mean drug loading was 21.48%,the mean diameter of the nanocapsule was 246 nm. The particle size was well-distributed showed by electron microscope pictures. Conclusion The prepared chrysophanol loaded polybutylcy-anoacrylate nanocapsules has small size,high encapsulation efficiency,and drug loading. The preparation technique established in this study is stable and feasible. It also can be used for iv injection.