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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Color evolution of poplar wood chips and its response to lignin and extractives changes in autohydrolysis pretreatment
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Color evolution of poplar wood chips and its response to lignin and extractives changes in autohydrolysis pretreatment

机译：杨树木屑的颜色演变及其对木质素的反应及萃取症的自身解析预处理

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Combining chemi-mechanical pulping with autohydrolysis pretreatment is an efficient and value-added utilization approach for lignocellulosic biomass in paper industry. To further promote the utilization of autohydrolyzed biomass in chemi-mechanical pulping, the color evolution of poplar wood chips in autohydrolysis pretreatment and its chromogenic mechanism were investigated by using CIELab color system, FT-IR, NMR and GPC. The results showed that the total color difference Delta E* increased obviously, which were remarkable as the combined hydrolysis factor (CHF) increased. The lignin content led to a more significant influence on the color of poplar wood chips than the extractives. The autohydrolysis pretreatment with a higher CHF accelerated the degradation and subsequent condensation of lignin, resulting in the formation of chromophoric groups, such as Hibbert ketone, quinones and qui none methides. It is of great significance for biomass refinery and paper industry to reveal the color evolution of poplar wood chips caused by autohydrolysis pretreatment from the point of view of chemical components' structure. (C) 2019 Elsevier B.V. All rights reserved.
机译：将化学机械制浆与自动解析预处理结合起来是造纸工业中木质纤维素生物质的有效和增值利用方法。为了进一步促进在化学机械制浆中使用自水面的生物质的利用，通过使用Cielab彩色系统，FT-IR，NMR和GPC研究了自动解析预处理中的杨树木屑及其发色机理的颜色演化。结果表明，总色差δe*明显增加，随着组合的水解因子（CHF）增加，显着显着。木质素含量导致对杨树木屑的颜色影响比提取物更大。具有较高CHF的自动解析预处理加速了木质素的降解和随后的缩合，从而形成发色团，如Hibbert酮，醌和Qui Nont Methides。生物量炼油厂和造纸工业对杨树木屑的颜色演变起来是具有重要意义，从化学成分结构的角度来看，杨树木屑。 （c）2019 Elsevier B.v.保留所有权利。

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