利用X射线衍射技术分析黄藤材微纤丝角、结晶度及<I>γ</I>射线的影响

doi:10.3964/j.issn.1000-0593(2010)05-1404-04

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摘要：为了解棕榈藤材基本材性、提高我国棕榈藤资源高附加值加工利用水平，以我国特有的黄藤为研究对象，应用X射线衍射法测定黄藤材微纤丝角、结晶度，并就γ射线辐照处理对微纤丝角、结晶度有何影响进行了分析。结果表明：纤维微纤丝角在33.4°～38.7°范围内，平均为36.1°;藤皮处微纤丝角不比藤芯处的大。当标准剂量率为2.5×10³ Gy·h^-1、辐射剂量分别为3，9和15 kGy三个水平时，辐照处理前后对应微纤丝角分别为36.2°和35.8°，35.9°和35.4°，36.2°和35.4°，较处理前分别减小了1.10%，1.39%和2.21%。纤维素结晶度在24.8%～32.0%范围内，平均为28.6%，藤皮处结晶度均比藤芯处高。辐照处理前后对应结晶度分别为28.1%和26.0%，28.1%和26.9%，28.5%和27.1%，较处理前分别减小了7.58%，4.34%和4.70%，其中当辐射剂量为3 kGy时，辐照导致结晶度差异在0.001水平上极显著。

关键词：黄藤;X射线衍射;微纤丝角;结晶度;辐照处理

Abstract：In order to find out the properties and improve the levels of high value-added processing and utilization of Chinese rattan resources, the Daemonorops Margaritae, a Chinese unique rattan, was chosen as the research material, then the microfibril angles (MFA) & crystallinity index (CrI) were measured through the X-ray diffraction method, and the effects of γ-ray irradiation upon the MFA & CrI were analyzed. The results show that the MFA of the cane varied from 33.4° to 38.7° with the average value of 36.1°, and the MFA of the coretex were not larger than that of the core. The MFA were 36.2 and 35.8 degrees, 35.9 and 35.4 degrees, and 36.2 and 35.4 degrees before and after irradiation with a radiation dose rate of 2.5×10³ Gy·h^-1 and radiation dose of 3, 9 and 15 kGy, and decreased 1.10%, 1.39% and 2.21% respectively compared with the former. The CrI was in the range of 24.8%-32.0%, and the average CrI was 28.6%. The CrI of coretex was larger than that of the core. Under the same radiation conditions, the CrI was 28.1% and 26.0%, 28.1% and 26.9%, and 28.5% and 27.1% before and after irradiation, and the latter decreased 7.58%, 4.34% and 4.70% respectively compared to the former. With the radiation dose of 3 kGy, the differences in CrI between with and without irradiation were most notable in the 0.001 level.

Key words：Daemonorops margaritae;X-ray diffractometry;Microfibrilla angles;Crystallinity index;γ-ray irradiation

收稿日期: 2009-05-10 修订日期: 2009-08-20

中图分类号:

O657.3

通讯作者: 刘杏娥 E-mail: liuxe@icbr.ac.cn

引用本文:

汪佑宏^1，2，刘杏娥^2*，江泽慧²，费本华²，任海青³ . 利用X射线衍射技术分析黄藤材微纤丝角、结晶度及γ射线的影响 [J]. 光谱学与光谱分析, 2010, 30(05): 1404-1407.
WANG You-hong^1，2, LIU Xing-e^2*, JIANG Ze-hui², FEI Ben-hua², REN Hai-qing³ . Analysis of the Microfibrilla Angles & Crystallinity Index of Daemonorops Margaritae with X-Ray Diffractometry and the Effects of γ-Ray Irradiation . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(05): 1404-1407.

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