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[目的]对5种常见坚果壳的元素组成、纤维素含量和结晶度进行分析。[方法]采用X射线衍射技术按照高度法、切线法、分峰面积法3种方法对坚果壳中的纤维素的结晶度进行了分析,采用X射线光电子能谱技术对坚果壳的成分和原子比进行了分析。[结果]X射线衍射测试结果表明,板栗、花生、瓜子、夏威夷果和核桃皮层纤维素的结晶度不同,结晶度变化趋势相同;X射线光电子能谱测试结果表明,这5种坚果壳主要是由C、O、N、Si元素组成,成分含量有差异。夏威夷果壳的结晶度最大,板栗壳原料纤维素结晶度最小;花生中的氮元素含量最高,原子百分比达到3.78%,花生中的O/C和N/C比值最大,分别达到0.29和0.05,Si/C原子比最高的是花生壳。[结论]该研究结果可为硬果壳的综合开发利用提供依据。
[Objective] The elemental composition, cellulose content and crystallinity of five kinds of common nutshell were analyzed. [Method] The crystallinity of cellulose in nut shell was analyzed by X-ray diffraction (XRD), tangent method and peak area method. The X-ray photoelectron spectroscopy Than the analysis. [Result] The results of X-ray diffraction showed that the crystallinity of chestnut, peanut, melon, macadamia and walnut cortex were different, and the changes of crystallinity were the same. The results of X-ray photoelectron spectroscopy showed that the five kinds of nutshell were mainly By the C, O, N, Si elements, composition differences. The highest degree of crystallinity was found in the shell of the Hawaiian shell, and the lowest degree of crystallinity was found in the chestnut shell. The content of nitrogen was the highest in the peanut with the percentage of 3.78% and the ratio of O / C to N / C was 0.29 and 0.05 respectively. The highest Si / C atomic ratio is peanut shell. [Conclusion] The results of this study can provide the basis for the comprehensive development and utilization of hard and hard shell.