数字农科院2.0

Effect of irradiation on the molecular weight, structure and apparent viscosity of xanthan gum in aqueous solution

文献类型： 外文期刊

作者： Li Yan-jie;Ha Yi-ming;Wang Feng;Li Yan-jie;Li Yong-fu

作者机构：

关键词： Xanthan gum;Irradiation;Molecular weight;Structure;Apparent viscosity

期刊名称： ADVANCED MATERIALS, PTS 1-4

ISSN： 1022-6680

年卷期： 2011 年 239-242 卷

页码：

收录情况： SCI

摘要： Xanthan gum samples were irradiated in aqueous solution at different doses (0-120 kGy) of 60Co gamma-rays. The changes of molecular weight and structures of irradiated xanthan gum samples were investigated and characterized by using gel permeation chromatography(GPC), X-ray diffraction (XRD), fourier-transform infrared spectra (FTIR), ultraviolet visible spectral (UV-vis) analysis and rheometer. Results showed the molecular weight decreased gradually with increasing irradiation dose. The radiation chemical yields G(d) of xanthan gum was 26.55. FTIR spectra and XRD indicated that gamma-irradiation introduced no significant changes into the structure and crystal texture, but UV spectra showed a distinct absorption peak at about 265 nm, increasing with irradiation dose, which was attributed to the formation of carbonyl groups or double bond. Apparent viscosity of xanthan gum solution decreased with increasing irradiation dose and remain basically constant with the prolonging of shear time after irradiation.

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