Journal of Hebei University (Natural Science Edition) ›› 2017, Vol. 37 ›› Issue (2): 141-146.DOI: 10.3969/j.issn.1000-1565.2017.02.006

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Preparation and characterization of a new hyaluronic acid grafted pullulan material

YANG Wenzhi,WANG Shugen,LIU Jiaoyan,JIA Bei,LI Haiying   

  1. College of Pharmacy, Hebei University, Baoding 071002, China
  • Received:2016-08-10 Online:2017-03-25 Published:2017-03-25

Abstract: A series of hyaluronic acid grafted pullulan(HA-Pu)were prepared by esterification reaction,using 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide(EDC)as dehydrating agent and 4-dimethylaminopyridine(DMAP)as catalyst.The structure of HA-Pu was confirmed by the Fourier transform infrared spectrum(FTIR)and proton nuclear magnetic resonance(1H NMR),and the degree of substitution(DS)of hyaluronic acid moiety was determined by 1H NMR.The freeze-dried HA-Pu materials could be compressed to obtain a HA-Pu film.The HA-Pu film was observed by scanning electron microscopy(SEM),which obtained the layered microstructure with a lot of small holes.Compared with hyaluronic acid,the HA-Pu materials have better ability to resist enzyme degradation in vitro.Therefore,HA-Pu should be a promising novel material to expand the application of hyaluronic acid in pharmaceatics.

Key words: hyaluronic acid, pullulan, chemical grafting, enzyme degradation in vitro

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