title: Preparation and characterization of debranched-starch/phosphatidylcholine inclusion complexes.
abstract: In this study, debranched-starch/phosphatidylcholine inclusion complexes were prepared. The effect of reaction parameters such as reaction temperature, reaction time, and addition amount of phosphatidylcholine on the phosphatidylcholine payload and inclusion rate was investigated. The phosphatidylcholine payload and inclusion rate prepared under the optimal conditions were 106 mg/g and 84.8%, respectively. The formation of debranched-starch/phosphatidylcholine inclusion complexes was confirmed by the results of XRD and FT-IR. Furthermore, the molecular, cluster, and fractal structures of the complexes were investigated using (13)C CP/MAS NMR and SAXS. The results indicated that the inclusion complexes were formed by hydrophobic interactions between alkyl chain of phosphatidylcholine and debranched-starch helix cavity. The complexes possessed a mass fractal structure, and a semicrystalline structure with a Bragg distance of 19.04 nm formed. After complexation, the stability of phosphatidylcholine was significantly improved, and phosphatidylcholine of the complexes can be gradually released with pancreatin treatment. This study revealed that debranched-starch can be used as an effective carrier of phosphatidylcholine for the purpose of improving its stability.
authors.affiliation: Carbohydrate Lab, College of Light Industry & Food Sciences, South China University of Technology , Guangzhou 510640, China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Cheng
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Luo
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.forename: Xiong
authors.initials: X
authors.lastname: Fu
mesh_terms: D002152:Calorimetry, Differential Scanning; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010713:Phosphatidylcholines / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D053838:Scattering, Small Angle; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D010713:Phosphatidylcholines; D011108:Polymers; D013213:Starch
keywords: complexes; debranched-starch; phosphatidylcholine; preparation