核桃壳化学组分的研究

Study on the Constituents of Walnut Shell

对核桃壳的化学组分研究表明:核桃壳的主要组分是木素、纤维素和半纤维素,与其他植物相比,冷、热水抽出物,1%NaOH抽出物,酸不溶木素含量均较高,纤维素含量明显较低,多戊聚糖含量与阔叶材相近.不同产地漾濞泡核桃的核桃壳,其化学组分有差异,但主要成分是酸不溶木素.核桃壳主要元素是C,H,O,N,S等,且含有Ca,Mg,Fe,Si,P等微量元素.核桃壳木素为GS型(愈创木基-紫丁香基型)木素,其中以G单元为主,且含有较多的甲氧基.

The chemical constituents of walnut shell were systematically studied. The results showed that the main constituents of walnut shell were lignin, cellulose and hemicelluloses. Compared with some other plants, the contents of cold and hot water extractives, 1% NaOH solution extractives, acid - insoluble lignin in walnut shell were higher, while the cellulose content was lower, and the pentosan content was close to that of hardwood. The constituents of the walnut shells from different growing areas were somewhat different, but the major component was the same as acid -insoluble lignin. The main elements contained in the walnut shell included C, H, O, N, S, and walnut shell also contained some micro -scaled elements, such as Ca, Mg, Fe, Si, P, etc.. The lignin type in walnut shell belonged to GS （Guaiacyl -Syringyl） lignin, in which G type was the predominant. There was comparatively large amount of -OCH3 base in the walnut shell lignin.