Influence of homogenization and drying on the thermal stability of microfibrillated cellulose
Influence of homogenization and drying on the thermal stability of microfibrillated cellulose
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DOI：
10.1016/j.polymdegradstab.2009.11.020
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发表时间：
2010-03-01
影响因子：
5.9
通讯作者：
Devaux, J.
中科院分区：
文献类型：
--
作者：
Quievy, N.;Jacquet, N.;Devaux, J.
均质化已用于从纤维素纤维中释放微原纤，以生产微原纤化纤维素 (MFC) 使用烘箱干燥、雾化或冷冻干燥来干燥 MFC 观察到与系统压实和微原纤附聚物的形成相关的形态差异 通过 TGA 检查，干燥 MFC 的热稳定性在均质化和干燥后下降 热解结束时的炭水平高于纤维素纤维 衍生物 TGA (dTGA) 显示干燥 MFC 在 250 摄氏度左右出现肩峰 通过与 TGA 和 DSC 联用的 FTIR 光谱 (FTIR) 检测挥发性降解产物表明肩峰对应于预期的纤维素脱水反应 通过压缩促进脱水反应增加微原纤维（束）与冻干 MFC 团聚体之间的接触 均质和干燥改变了 MFC 的热性能 冷冻干燥没有显着的动力学影响关于 MFC 热行为的观察 (C) 2009 Elsevier Ltd 保留所有权利。
Homogenization has been used to release microfibrils from cellulose fibres to produce microfibrillated cellulose (MFC) Oven drying, atomization or freeze-drying were used to dry MFC Morphological differences were observed linked to the compaction of the system and the formation of microfibril agglomerates Thermal stability of the dried MFC, checked by TGA, decreased after homogenization and drying Char level at the end of the pyrolysis was higher than for cellulose fibres Derivative TGA (dTGA) showed a shoulder around 250 degrees C for the dried MFC Volatile degradation product detection by FTIR spectroscopy (FTIR) coupled to TGA and DSC showed that the shoulder corresponds to expected dehydration reactions of the cellulose Increasing the contacts between microfibril(s) (bundles) and agglomerates of the freeze-dried MFC by compression promoted dehydration reactions Homogenization and drying modified the thermal properties of the MFC No significant influence of freeze-drying kinetics on the thermal behaviour of the MFC was observed (C) 2009 Elsevier Ltd All rights reserved.