【摘要】 以壳聚糖凝胶膜为模板 ,将壳聚糖溶液与 Na OH凝固液隔离 ,利用膜渗透原位沉析法制备了高性能的壳聚糖棒材 (d=4 .5 mm) ,其弯曲强度、弯曲模量和剪切强度分别为 92 .4 MPa,4 .1 GPa和 3 6.5 MPa.扫描电子显微镜 (SEM)分析结果表明 ,原位沉析法制备的壳聚糖棒材具有同心筒状层叠结构 ,并对其成型机理进行了探讨更多还原

【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 56.3×10 4 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.更多还原