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首页> 外文期刊>Journal of Thermal Analysis and Calorimetry >On the thermal degradation of cellulose in cotton fibers
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On the thermal degradation of cellulose in cotton fibers

机译：关于棉纤维中纤维素的热降解

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Thermal decomposition of cellulose has been widely studied for the past several years. It has been reported that the source of cellulose and its composition greatly affect its pyrolysis. One of the most widely used analytical tools for the study of cellulose pyrolysis is thermogravimetric (TG) analysis. Several model-fitting methods have been employed to study cellulose pyrolysis kinetics. An alternative to the model-fitting approach is the so-called model-free method developed by Vyazovkin. This isoconversional technique calculates the activation energy as a function of the degree of the conversion. In this article, the pyrolysis of cellulose in cotton fibers compared to microcrystalline cellulose (Avicel, PH 105) was investigated. TG curves were acquired as a function of the heating rates (4, 5, 8, 10, and 16 °C min−1) and the model-free method was used to analyze the data. Activation energies of cotton fibers and Avicel were obtained, and compared to the data reported in the literature. In addition, models for isothermal decomposition were calculated and compared with experimental data at the same temperature.
机译：在过去的几年中，对纤维素的热分解进行了广泛的研究。据报道，纤维素的来源及其组成极大地影响了其热解。用于研究纤维素热解的最广泛使用的分析工具之一是热重分析（TG）。几种模型拟合方法已被用于研究纤维素热解动力学。 Vyazovkin开发的所谓的无模型方法是模型拟合方法的替代方法。这种等转换技术根据转换程度来计算活化能。在本文中，与微晶纤维素（Avicel，PH 105）相比，研究了棉纤维中纤维素的热解。根据加热速率（4、5、8、10和16°C min -1 ）获取TG曲线，并采用无模型方法分析数据。获得了棉纤维和Avicel的活化能，并将其与文献报道的数据进行了比较。另外，计算了等温分解的模型并将其与相同温度下的实验数据进行比较。

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