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首页> 外文期刊>Journal of Applied Polymer Science >Origin of furanic compounds in thermal degradation of cellulosic insulating paper
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Origin of furanic compounds in thermal degradation of cellulosic insulating paper

机译：呋喃化合物在纤维素绝缘纸热降解中的起源

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摘要

The chemical components of cellulosic insulation (i.e., Kraft paper, cellulose, lignin, pentosans) used in electrical transformers were aged in transformer oil to determine the relative yield of furanic degradation products. The results show that the pentosans component of the paper give, by far, the highest yield of 2-furfural followed by cellulose, levoglucosan, and lignin. However, the pentosans did not produce any detectable quantities of either 5-hydroxymethyl-2-furfuraldehyde or 2-furfurol, both of which are known to be produced by the degradation of Kraft paper, alpha-Cellulose was found to give 3 times as much 2-furfural as levoglucosan, which is a degradation product of cellulose, suggesting another pathway to 2-furfural production from cellulose than exclusively through the commonly quoted mechanism in which levoglucosan is the intermediate. It was also found that the production of 2-furfural from levoglucosan appears to be accelerated by acidic conditions in oxidized oil. (C) 1998 John Wiley & Sons, Inc. [References: 14]
机译：将用于电力变压器的纤维素绝缘材料（即牛皮纸，纤维素，木质素，戊聚糖）的化学成分在变压器油中老化，以确定呋喃降解产物的相对产率。结果表明，到目前为止，纸中的戊聚糖成分能使2-糠醛的产率最高，其次是纤维素，左旋葡聚糖和木质素。然而，戊聚糖不产生任何可检测量的5-羟甲基-2-糠醛或2-糠醇，已知两者都是通过牛皮纸降解而产生的，发现α-纤维素的量是其的三倍。 2-糠醛为左旋葡聚糖，它是纤维素的降解产物，这表明从纤维素到2-糠醛生产的另一种途径是不仅仅通过通常引用的机理（其中左旋葡聚糖是中间体）来进行。还发现从左旋葡聚糖生产2-糠醛似乎被氧化油中的酸性条件加速。 （C）1998 John Wiley＆Sons，Inc. [参考：14]

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