Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (6): 1063-1065.doi: 10.1007/s40242-014-4166-z

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Novel Method to Graft Chitosan on the Surface of Hydroxyapatite Nanoparticles via “Click” Reaction

WEI Junchao1,2, GUO-WANG Peiyao1, CUI Liguo3, ZHANG Haobin1, DAI Yanfeng1, LIU Tianxi1,2   

  1. 1. Department of Chemistry, Nanchang University, Nanchang 330031, P. R. China;
    2. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China;
    3. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:2014-04-30 Revised:2014-08-18 Online:2014-12-01 Published:2014-09-09
  • Contact: WEI Junchao, LIU Tianxi E-mail:weijunchao@ncu.edu.cn;txliu@fudan.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.51203073, 51463013), the Natural Science Foundation of Jiangxi Province of China(No.20142BAB203018) and the Natural Science Foundation of Education Department of Jiangxi Province of China(No.GJJ13107).

Abstract:

In order to tune the surface properties of hydroxyapatite(HA) nanoparticles and prevent them from aggregation, an efficient method was proposed to graft chitosan(CS) molecules on the surface of HA via “click” reaction. Thermal gravimetric analysis(TGA) shows that CS was successfully grafted on the surface of HA nanoparticles and the grafting amount was about 8.9 g of CS on per hundred grams of HA. The grafted chitosan chains can prevent HA nanoparticles from aggregation and greatly enhance the colloidal stability of HA in water. The 3-(4,5-dimethylthiazoyl-2-yl)-2,5-diphenyltetrazolium bromide(MTT) assay demonstrats that the cytotoxicity of CS modified HA(HA-CS) is negligible and thus HA-CS may find potential application in biomedical fields.

Key words: Hydroxyapatite, Chitosan, Surface modification, Nanocomposite, Biomaterial