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首页> 外文期刊>Fibres & textiles in Eastern Europe >Study on the Thermal Insulation Performance of PAN Pre-Oxidised Fibre Felts
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Study on the Thermal Insulation Performance of PAN Pre-Oxidised Fibre Felts

机译：PAN预氧化纤维毡的隔热性能研究

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摘要

In this paper, an orthogonal experiment of 3 factors and 3 levels was firstly designed to prepare PAN pre-oxidised fibre felts with good thermal insulation properties; the range method was used to analyse the result of the orthogonal experiment, and finally the tensile properties and thermal stability were tested. Finally, pre-oxidised fibre felt composites for the coating of silica aerogel were prepared using the coating process to compound silica aerogel on re-oxidised fibre felts. Firstly, the influence of the content of silica aerogel on the heat insulation performance of the coated composite materials was analysed, and then a test of the coefficient of thermal conductivity, an experiment on the back temperature, and characterisations of the tensile properties and thermal stability of the composite coating of pre-oxidised fibre felt composites of the coating of silica aerogel were carried out. Results showed that through analysis of the orthogonal experiment, we can state that the best preparation process of pre-oxidised fibre needled felts was as follows: needle number - 2, needle depth - 8 mm, and needle frequency - 140 times/min. The transverse tensile strength of PAN pre-oxidised fibre needled felts prepared by crossly webbing of PAN pre-oxidised fibres was superior to the longitudinal tensile strength; thermogravimetric analysis showed that the pre-oxidised fibre needled felts had excellent thermal stability. The coefficient of thermal conductivity of the aerogel coating of the composites firstly decreased and then increased with an increase in the content of aerogel. Coated composites had the lowest coefficient of thermal conductivity when the aerogel content was 4% wt. At temperatures of 100 degrees C, 150 degrees C and 200 degrees C, the heating rate of the transient-state back temperature and the steady-state average temperature were both the lowest when the aerogel content was 6% wt.
机译：在本文中，首先设计了3个因素和3个水平的正交试验，以制备具有良好隔热性能的PAN预氧化纤维毡;该测距法用于分析正交实验的结果，最后测试拉伸性能和热稳定性。最后，使用涂布方法在重新氧化纤维毡上复合二氧化硅气凝胶，制备用于涂覆二氧化硅气体涂层的预氧化纤维毡复合材料。首先，分析了二氧化硅气凝胶含量对涂覆的复合材料的隔热性能的影响，然后对热导率系数，后温度的试验，以及拉伸性能的特征和热稳定性进行二氧化硅气凝胶涂层的预氧化纤维毡复合材料的内容。结果表明，通过对正交实验的分析，我们可以说明预氧化纤维针毛毡的最佳制备过程如下：针数 - 2，针深 - 8 mm，针频率 - 140次/分钟。通过泛氧化纤维横跨缠绕的锅预氧化纤维的横向拉伸强度通过横向氧化纤维制备的横向拉伸强度优于纵向拉伸强度;热重分析表明，预氧化的纤维针刺具有优异的热稳定性。复合材料的气凝胶涂层的导热系数首先降低，然后随着气凝胶含量的增加而增加。当气凝胶含量为4％wt时，涂覆的复合材料具有最低的导热系数。在100摄氏度的温度下，150℃和200摄氏度的温度下，瞬态后退温度和稳态平均温度的加热速率在气凝胶含量为6％wt时均最低。

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