高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (3): 575.

• 研究论文 • 上一篇    下一篇

原位沉析法制备碳酸钙/壳聚糖三维复合材料的研究

胡巧玲, 陈中科, 陈亮,沈家骢   

  1. 浙江大学高分子复合材料研究所,杭州 310027
  • 收稿日期:2005-04-01 出版日期:2006-03-10 发布日期:2006-03-10
  • 通讯作者: 胡巧玲(1957年出生),女,博士,教授,主要从事医用高分子材料的研究. E-mail: huql@zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号： 50173023)、 国家自然科学基金重点项目(批准号： 50333020)和浙江省科技计划项目(批准号： 2003C31044)资助

Preparation of CaCO3/Chitosan Three-dimentinal  Composite Material via in-situ Precipitation

HU Qiao-Ling*,CHEN Zhong-Ke,CHEN Liang,SHEN Jia-Cong   

  1. Institute of Polymer Composites,Zhejiang University,Hangzhou 310027,China
  • Received:2005-04-01 Online:2006-03-10 Published:2006-03-10

PDF (PC)

被引次数

30

摘要：

将含有Ca2+的壳聚糖溶液与含有CO2-3的碱溶液用离子可渗透膜隔离,根据膜渗透原理,使膜内壳聚糖与碱液原位沉析,生成碳酸钙,得到具有高强度的碳酸钙(CaCO3)/壳聚糖(CS) 三维复合材料. XRD测试结果表明,生成的碳酸钙以方解石晶型存在. 从SEM可以观察到碳酸钙颗粒尺寸约为5～10 μm,并且颗粒呈有序分布,它们以棒材的纵轴为中心,围绕中心呈环状分布. 对不同碳酸钙含量的复合棒材进行了弯曲性能测试,其弯曲强度随碳酸钙含量的增大先上升后下降. 在碳酸钙质量分数为10％时,弯曲强度达到最大值(约为113 MPa),弯曲模量为2.6 GPa.

关键词: 壳聚糖; 碳酸钙; 原位沉析; 三维复合材料

Abstract:

A widely used inorganic compound in laboratory,CaCO3/chitosan composite with high performed and potential applicable prospects,was prepared by the method of in-situ precipitation. In this method the calcium ions were added into the solution of chitosan firstly and were dispersed homogeneously to attain the uniform solution. Then the uniform solution as the CaCO3/chitosan precursory solution was poured into a cylindrical glass mold,on the internal surface of which a chitosan membrane had been precipitated. Afterward the mold was soaked in the mixture of NaOH  and Na2CO3 aqueous solutions. Finally through the following proceedings,the three-dimensional composite in which the particles of calcium carbonate were dispersed was achieved in the experiment. XRD were carried out to determine the presence of the calcium carbonate. SEM was preformed to investigate the distributing regularity of calcium carbonate and the size of the calcium carbonate particle. It could be seen that the particles of orbicular were distributed orbicularly on the cross section and its size was about 5-10 μm. The mechanical properties of the composite were evaluated by three-point bending test. The bending strength enlarged firstly and then dropped with the increase of calcium carbonate′s mass fraction and the modulus decreased continuously.

Key words: Chitosan; Calcium carbonate; In-situ precipitation; Three-dimensional composite material

中图分类号: 

TrendMD: