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Citation: WANG Zheng-Ke, HU Qiao-Ling. Chitosan Rods Reinforced by N-Carboxyl Propionyl Chitosan Sodium[J]. Acta Physico-Chimica Sinica, ;2010, 26(07): 2053-2056. doi: 10.3866/PKU.WHXB20100711 shu

Chitosan Rods Reinforced by N-Carboxyl Propionyl Chitosan Sodium

1.
Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Institute of Biomedical Macromolecules, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China

Received Date: 22 October 2009
Available Online: 20 May 2010

N-carboxyl propionyl chitosan sodium (CPCS) was used to reinforce chitosan (CS) rods by an in-situ precipitation method. Fourier transforminfrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric (TG) analysis, scanning electron microscopy (SEM), and mechanical test were used to study the properties of the composite rods. The FTIR spectra confirmed that the amino and acetamido groups on CS had a strong electrostatic attraction to the carboxylate groups on CPCS. The XRD patterns showed that the crystals in CS were destroyed because of the addition of CPCS. The thermal stability of the CPCS/CS composite rods was better than those of pure CS rods and pure CPCS as a strong interaction exists between CS and CPCS molecules. The layer-by-layer structure of the CPCS/CS composite rods became tighter compared with that of pure CS rods, which resulted in improved mechanical properties for the composite rods. As 15% (w) CPCS in the composite rods, the bending strength and the bending modulus were 156.0 MPa and 5.3 GPa, which increased by 68.8% and 29.3% compared with that of pure CS rods, respectively. Therefore, CPCS reinforces CS rods effectively and these composite rods with excellent mechanical properties can be used in novel biomedical devices to fix the bone fracture.
- Chitosan,
- N-Carboxyl propionyl chitosan sodium,
- Composite,
- Reinforcement,
- Biomaterial
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