Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (1): 10302-010302.doi: 10.11889/j.1000-3436.2017.rrj.35.010302

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Irradiation and sensitizing effects on chitosan degradation

LI Zhaolong1, WANG Yingqi2, XIE Yuying1, LU Peng2, ZHANG Yuehong1, WANG Xiaochang2, LIU Yajian1   

  1. 1 Zhejiang Institute of Application Energy and Nuclear Technology, Hangzhou 310012, China;
    2 Zhejiang University, Hangzhou 310058, China
  • Received:2016-11-28 Revised:2017-01-10 Online:2017-02-20 Published:2017-02-20
  • Supported by:

    Supported by the Science and Technology Planning Project of Zhejiang Province,China (2014F60003)

Abstract:

Interaction systems of electron beam irradiation and sensitizers were used to degrade wet chitosan powder for preparing chitosan with low molecular weight and well biological activity. The degraded molecular weight of the sample was characterized by gel permeation chromatography (GPC), and chemical characteristics including main chain structure and crystallization were determined by Fourier transform infrared spectroscopy (FTIR) and X ray diffraction (XRD), respectively. The experimental results showed that no obvious change generates in the main chain structure of the degraded chitosan, and the crystallization increased with the decreasing molecular weight. With the presence of sensitizers, the degraded molecular chitosan can be decreased from 1.1×105 to 1 170 at low absorbed dose of 20 kGy with higher rates of 1.51×10-5.

Key words: Chitosan, Irradiation degradation, Sensitizer, Molecular weight

CLC Number: 

  • TL13