| 新疆长绒棉辐射效应的谱学研究 |
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| 引用本文： | 赵新,邹琴,孙万赋,唐军.新疆长绒棉辐射效应的谱学研究[J].波谱学杂志,2009,26(1):83-87. |
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| 作者姓名： | 赵新 邹琴 孙万赋 唐军 |
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| 作者单位： | （1.新疆大学 理化测试中心，新疆 乌鲁木齐 830046；2.中国科学院 武汉物理与数学研究所，湖北 武汉 430071） ; |
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| 基金项目： | 波谱与原子分子物理国家重点实验室资助课题 |
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| 摘 要： | 用13C CP/MAS NMR谱、ESR谱和质子弛豫时间等方法，研究了经γ射线在室温下辐照后新疆长绒棉纤维的辐射效应. 结果表明随着辐照剂量的增加，长绒棉纤维内的自由基浓度明显的增大，并产生了多种自由基的混合物. 由辐照前后的长绒棉纤维的13C CP/MAS NMR谱可以得出，随着辐射剂量的增加，C1峰的谱宽趋向增宽，表明了自由基存在的位置. 各类弛豫时间的改变则反映出长绒棉纤维内部聚集态结构和大分子链运动随辐射剂量的变化.
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| 关 键 词： | 新疆长绒棉 核磁共振(NMR) 13C CP/MAS NMR谱 ESR谱 弛豫时间 |
| 收稿时间： | 2008-9-26 |
| 修稿时间： | 2008-11-14 |
Radiation Effects on Xinjiang Long-staple Cotton Fiber Studied by Magnetic Resonance Techniques |
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| ZHAO Xin,ZOU Qin,SUN Wan-fu,TANG Jun.Radiation Effects on Xinjiang Long-staple Cotton Fiber Studied by Magnetic Resonance Techniques[J].Chinese Journal of Magnetic Resonance,2009,26(1):83-87. |
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| Authors: | ZHAO Xin ZOU Qin SUN Wan-fu TANG Jun |
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| Institution: | (1.Analysis and Research Center, Xinjiang University, Urumqi 830046, China; ;2.Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China) ; |
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| Abstract: | The irradiation effects on the aggregate state and microstructure of Xinjiang long-staple cotton fiber were studied by solid state 13C CP/MAS NMR, 1H relaxation time measurements and ESR spectroscopy. The results showed that the microstucture of the long-staple cotton fiber were not altered after 5 Gy γ irradiation, while the crystallization state of the cotton fiber changed significantly under 75 Gy γ irradiation. It was also shown that γ irradiation induced production of different types of free radicals whose concentrations increased with the irradiation dose. The results of 1H NMR relaxation time measurements suggested that γ irradiation could cause changes of molecular motions in the Xinjiang long-staple cotton fiber. |
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| Keywords: | NMR long-staple cotton fiber 13C CP/MAS NMR spectra ESR relaxation time |
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