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首页> 外文期刊>Journal of Applied Polymer Science >Study of the thermal behavior of alkali-treated jute fibers
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Study of the thermal behavior of alkali-treated jute fibers

机译：碱处理黄麻纤维的热行为研究

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Jute fibers were treated with 5% NaOH solution for 2, 4, 6, and 8 h to study the performance of the fibers as a reinforcing material in the composites. Thermal analysis of the fibers was done by the DTG and DSC technique. The moisture desorption was observed at a lower temperature in the case of all the treated fibers, which might be a result of the increased fineness of the fibers, which provides more surface area for moisture evaporation. The decrease in percentage moisture loss for the fibers treated with alkali for 6 and 8 h could be the result of the increased crystallinity of the fibers. The percentage degradation of the hemicellulose decreased considerably in all the treated fibers, conforming to the fact that the hemicellulose content was lowered on alkali treatment. The decomposition temperature for a-cellulose was lowered to 348degreesC from 362.2degreesC for all the treated fibers, and the residual char formation increased to a significant extent. The enthalpy for the thermal degradation of a-cellulose showed a decreasing trend for the fibers treated for 2 and 4 h, which could be caused by the initial loosening of the structure, followed by an increase in the enthalpy value in the case of the 6- and 8-h-alkali-treated fibers resulting from increased crystallinity, as evident from the X-ray diffraction. (C) 2002 Wiley Periodicals, Inc. [References: 28]
机译：黄麻纤维用5％NaOH溶液处理2、4、6和8小时，以研究纤维在复合材料中作为增强材料的性能。纤维的热分析通过DTG和DSC技术进行。在所有处理过的纤维的情况下，均在较低的温度下观察到水分的解吸，这可能是纤维细度增加的结果，纤维的细度增加了水分蒸发的表面积。用碱处理6小时和8小时的纤维水分损失百分率的降低可能是纤维结晶度提高的结果。在所有处理的纤维中，半纤维素的降解百分率显着降低，这符合在碱处理后半纤维素含量降低的事实。对于所有处理过的纤维，α-纤维素的分解温度均从362.2℃降低到348℃，残留的焦炭形成显着增加。处理2 h和4 h的纤维对a-纤维素热降解的焓显示出下降的趋势，这可能是由于结构最初松弛，然后在6的情况下焓值增加所致。从X射线衍射可以明显看出，结晶度的提高导致了α-和8 h碱处理的纤维。 （C）2002 Wiley Periodicals，Inc. [参考：28]

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