作　　者： ; ; ; ;

机构地区： 华南理工大学轻工与食品学院制浆造纸工程国家重点实验室

出　　处： 《光谱学与光谱分析》 2006年第6期1031-1033,共3页

摘　　要： 通过碱木素模型物对醌、邻醌和香兰素的溶液在800-900nm的近红外光谱波段内的吸收谱图的对比发现，对醌和邻醌在此波段产生较强的吸收，而香兰素基本上没有吸收，证明了碱木素的醌型结构在800-900nm波段内产生特征吸收。对银杏和夹竹桃磨木木素碱处理前后的溶液在800-900nm波段内的吸光度的差别分析，发现夹竹桃的磨木木素的吸光度的相对变化更大，这是由于夹竹桃磨木木素经碱处理后产生了更多的醌型结构。这也是在硫酸盐法蒸煮过程中在800-900nm波段内阔叶材的蒸煮液吸光度大于针叶材的蒸煮液吸光度的主要原因。 The results showed that o-quinone and q-quinone had strong absorption while vanillin had nearly no absorption in the 800-900 nm range of near-infrared spectroscopy through the comparison of their near-infrared absorption spectra. It was proved that quinone structure of alkali lignin had strong absorption in the 800-900 nm range of near-infrared spectroscopy. The change in the absorbency of oleander milled wood lignin treated with NaOH and Na2S before and after is greater than that in the absorbency of ginkgo milled wood lignin treated with NaOH and Na2S before and after because more quinone structure was formed in the process of oleander milled wood lignin treated with NaOH and Na2S. The finding well explained that cooking liquor of hardwood was mueh stronger than that of softwood while their pulp kappa number was very near.

关 键 词： 碱木素 磨木木素 近红外光谱 吸光度 醌型结构

领　　域： [轻工技术与工程] [机械工程] [理学] [理学]