Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (7): 36-41.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Preparation and Mechanical Properties of Composite Chitosan/Nano-Sized SiOx Film

Wang Ming-li1  Si Fang1  Zhang Yi-ming1  Zhao De-gang2    

  1. 1. Gnizhou Province Key Laboratory of Fermentation Engineering and Bio-Pharmacy, Gnizhou University, Guizhou 550003, Guiyang, China; 2. Key Laboratory of Green Pesticide and Agricultural Biological Engineering of the Ministry of Education, Guizhou University, Guizhou 550025, Guiyang, China
  • Received:2007-12-19 Revised:2008-03-17 Online:2008-07-25 Published:2008-07-25
  • Contact: 王明力（1961-），女，教授，主要从事生物材料的研究． E-mail:wmlgycn@tom．com
  • About author:王明力（1961-），女，教授，主要从事生物材料的研究．
  • Supported by:

    贵州省优秀科技教育人才省长基金资助项目（200619）;贵州省科技攻关项目（NGY065）

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Abstract:

The preparation conditions of composite chitosan/nano-sized SiOx （ CTS-SiOx） films were optimized by quadratic-regression rotatable orthogonal experiments, and the films with homogeneous structure were prepared via the casting method, which were then characterized by means of IR, XRD and TEM. The results show that there are a great number of hydrogen bonds between chitosan and the hydroxyls on nano-sized SiOx surface, that the CTS- SiOx film with a chitosan/SiO/glycerel monostearte mass ratio of 1.98： 0. 017：0.04 has a maximum tensile strength, and that, as compared with the chitosan film, the tensile strength, breaking extensibility and orthogonaltear strength of the composite film increase respectively by 63.3% , 45.4% and 11.6% , while the water permeability decreases by 73.1%. It is thus concluded that the composite film is superior to the film with single component.

Key words: chitosan, composite film, tensile strength, quadratic-regression rotatable orthogonal experiment