Studies on Chitosan Rods Prepared by in situ Precipitation Method

Abstract

Abstract: A novel and simple method, in situ precipitation, was developed to prepare a high performance chitosan rod which is a potential material as the internal fixation of bone fracture, by using CS coagulation membrane as model to separate CS solution from 5% NaOH coagulation solution. CS rod(d=4.5 mm) with bending strength, bending modulus and shear strength of 92.4 MPa, 4.1 GPa and 36.5 MPa respectively was obtained when molecular weight(M_η) of CS was 56.3×10⁴ and the degree of deacetylate was 91%. SEM observed shows that CS rods prepared by in situ precipitation method has a concentric structure. The mechanism for preparing the gel rod was also discussed in this paper.

Key words: Chitosan, In situ precipitation method, Chitosan rods, Mechanical strength

CLC Number:

O636.1

TrendMD:

HU Qiao-Ling, QIAN Xiu-Zhen, LI Bao-Qiang, SHEN Jia-Cong . Studies on Chitosan Rods Prepared by in situ Precipitation Method[J]. Chem. J. Chinese Universities, 2003, 24(3): 528.

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Studies on Chitosan Rods Prepared by in situ Precipitation Method

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