Preparation and characterization of curcumin/β-cyclodextrin nanoparticles by nanoprecipitation to improve the stability and bioavailability of curcumin
Longwei Jiang, Ning Xia, Fenghui Wang, Cancan Xie, Rong Ye, Hongjie Tang, Huajiang Zhang, Yingzhu Liu
Abstract
This work, curcumin/β-cyclodextrin inclusion complex (CUR/β-CD IC) nanoparticles were successfully synthesized via flexible and efficient nanoprecipitation using absolute ethanol as precipitant. At the 1:2 and 1:1 M ratios of CUR/β-CD nanoparticles, the encapsulation efficiency reached more than 70%, and particle size was ∼200 nm. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) results validated the construction of CUR/β-CD nanoparticles. FT-IR results indicated that CUR remained in β-CD cavity, and the IC molecules aggregated to form nanoparticles via intermolecular hydrogen bonding. XRD results displayed the formation of new solid crystal phases in CUR/β-CD IC nanoparticles. As-synthesized CUR/β-CD IC nanoparticles exhibited excellent physicochemical stability compared to free CUR. Encapsulation of CUR within nanoparticles also improved its bioavailability. Therefore, nanoprecipitation is a promising approach to synthesize CD-based nanoparticles for delivery of CUR or other phytochemicals with enhanced stability and bioavailability.