Synergetic degradation of chitosan with gamma radiation and hydrogen peroxide

被引：144

作者：

Kang, Bin ^{[1
]}

Dai, Yao-dong ^{[1
]}

Zhang, Hai-qian ^{[1
]}

Chen, Da ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Med Phys Ctr, Nanjing 210016, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2007年 / 92卷 / 03期

关键词：

chitosan; degradation; synergetic effect; gamma radiation; hydrogen peroxide;

D O I：

10.1016/j.polymdegradstab.2006.12.006

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Chitosan samples were irradiated by (CO)-C-60 gamma-rays in the presence of hydrogen peroxide with radiation dose from 10 kGy to 100 kGy. The degradation was monitored by gel permeation chromatography (GPC), revealing the existence of a synergetic effect on the degradation. Structures of the degraded products were characterized with Fourier-transform infrared spectra (FT-IR), ultraviolet-visible spectral (UV-vis) analysis, and X-ray diffraction (XRD). Results showed that the crystallinity of chitosan decreases with degradation, and the crystalline state of water-soluble chitosan is entirely different from that of water-insoluble chitosan. An elemental analysis method was employed to investigate changes in the element content of chitosan after degradation. Mechanism of chitosan radiation degradation with and without hydrogen peroxide was also discussed. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：359 / 362

页数：4

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