CRCU

Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (6): 1107-1111.

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Solution Properties of Mixed Starch/Chitosan Revealed by Resonance Light Scattering

HU Yong1, FU Xiong2, CHEN Xu-dong3, ZHONG Nan-jing1   

  1. 1. School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China;
    2. College of Light Industry and Food Science, South China University of Technology, Guangzhou 510640, P. R. China;
    3. School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
  • Received:2011-09-29 Revised:2012-02-29 Online:2012-11-25 Published:2012-11-09
  • Contact: HU Yong E-mail:lidhyong@126.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.50673104).

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Abstract:

The association behavior of starch and chitosan and the dilute solution properties of the starch/chitosan complex were investigated by means of resonance light scattering(RLS) spectra. The interaction between starch and chiotsan was proved by RLS. Based on the results, the appropriate association condition was selected. However, the solution property of starch/chitosan was affected greatly by external factors such as pH value and metal ionic strength. The change of pH, which causes the irreversible transition of solution from transparent into murky, provides some important information of partitioning behavior of the complex in solution. The durative enhancement of RLS intensity for the complex exhibited two inflexions and a plateau in the presence of a certain amount of Fe3+. It indicates that Fe3+ not only increases the RLS intensity, but also induces the micell-aggregate transition of the complex in solution. Moreover, the thermodynamic parameters for micell formation process at different temperatures, based on the RLS values, were calculated.

Key words: Starch, Chitosan, Complex, Solution property, Resonance light scattering