Preparation and characterization of oxidized corn starch/gelatin composite capsules

Objective: Modified starch was used to mix with gelatin to prepare the capsule shell, and the cost of preparing the capsule shell was reduced. Methods: Oxidized corn starch prepared by using 15% hydrogen peroxide was used as raw material to mix with part of gelatin. The oxidized corn starch/gelatin composite film and capsules were prepared by casting method and impregnation method, respectively, and were characterized by Fourier transform infrared spectroscopy （FT-IR）, X-ray diffraction （XRD） and Scanning electron microscopy （SEM）. Results: The results showed that the ratio of oxidized corn starch and gelatin was 5∶5, the drying weight loss of oxidized corn starch/gelatin composite capsules was 13.0%～15.0%, the disintegration time in distilled water and simulated artificial gastric juice was less than 10min, and the crunchability was not more than 5 granules. Conclusion: The properties of the composite capsule prepared by blending oxidized corn starch with gelatin met the requirements of Chinese Pharmacopoeia （2020）.