γ-ray degradation of chitosan to prepare water-soluble oligomers

KANG Bin; QI Zhiqiang; WU Yajun; TANG Xiaobin; CHANG Shuquan; ZHANG Peigen; FANG Meihua; DAI Yaodong

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γ-ray degradation of chitosan to prepare water-soluble oligomers

更新时间：2023-03-30

- γ-ray degradation of chitosan to prepare water-soluble oligomers
- Journal of Radiation Research and Radiation Processing Vol. 24, Issue 2, Pages: 83-86(2006)
- 作者机构：
  
  1.南京航空航天大学材料科学与技术学院医学物理系　南京　210016
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KANG Bin, QI Zhiqiang, WU Yajun, et al. γ-ray degradation of chitosan to prepare water-soluble oligomers. [J]. Journal of Radiation Research and Radiation Processing 24(2):83-86(2006)
DOI：

KANG Bin, QI Zhiqiang, WU Yajun, et al. γ-ray degradation of chitosan to prepare water-soluble oligomers. [J]. Journal of Radiation Research and Radiation Processing 24(2):83-86(2006) DOI：

摘要

用γ辐射降解法成功制备了一系列小分子水溶性壳聚糖。研究了不同条件下γ射线对壳聚糖的降解效应以及吸收剂量对产物分子量和水溶性产物得率的影响，分析了不同预处理条件对辐射降解产额（,G,d,值）的影响，并对壳聚糖辐射降解的机理进行了初步探讨。所得产物用凝胶渗透色谱（Gel permeation chromatography，GPC）、傅立叶变换红外光谱（Fourier transform infrared spectrometer，FT-IR）、紫外-可见光谱（Ultraviolet-Visible spectrophotometry，UV-VIS）等手段进行了表征分析。结果表明，壳聚糖在降解过程中不但分子量显著减少，而且化学结构发生了明显变化，·OH自由基在壳聚糖辐射降解过程中起着至关重要的作用。

Abstract

Water-soluble chitosan oligomers with different molecular weight were prepared by a γ-ray degradation method. Effects of irradiation conditions on the chitosan degradation, molecular weight of the irradiated chitosan and yield of the water-soluble products were studied. ,G,d, value of the chitosan radiation degradation was calculated, and mechanisms of the degradation were discussed. Gel permeation chromatography, Fourier transform infrared spectroscopy and ultraviolet-visible spectrometry (UV-VIS) were applied to characterized and analyzed the degradation products. The results indicated that molecular weight of the degraded chitosan decreased remarkably and its chemical structure changed. It was considered that OH radical is vital to the radiation degradation of chitosan.

关键词

壳聚糖辐射降解水溶性分子量化学结构

Keywords

ChitosanRadiation degradationWater-solubilityMolecular weightChemical structure

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