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首页> 外文期刊>Chemical Science International Journal >Characterization of Micro-fibrillated CelluloseProduced from Sawmill Wastage: Crystallinity andThermal Properties
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Characterization of Micro-fibrillated CelluloseProduced from Sawmill Wastage: Crystallinity andThermal Properties

机译：锯木厂废料生产的微纤化纤维素的表征：结晶度和热性质

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摘要

In this work, micro-fibrillated cellulose (MFC) was prepared from sawdust and characterized by FTIR, WAXRD, and TGA. The MFC was synthesized by several steps such as alkali treatment, followed by NaClO_(2) bleaching and acid hydrolysis. The acid hydrolysis was performed by three different H_(2)SO_(4) concentrations (1N, 3N and 5N) whereas other conditions were remained unchanged. MFC were exhibited the identical peaks in FTIR spectra. The oxidation reaction took place during the MFC preparation by using high concentrations of acid which was detected by FTIR spectra. The crystallinity index of prepared MFC was measured by peaks at 16.2o and 22.2o (2θ angles) of WAXRD curves. The crystallinity index was increased with acid concentration up to 1N H_(2)SO_(4) and thereafter decreased. The TGA results showed that the MFC degrade earlier temperature compare to the bleached pulp. The peaks of differential thermo-gravimetric curves (DTG) were shifted to lower temperature with the increase of acid concentration during hydrolysis of bleached pulp.
机译：在这项工作中，由锯末制备微纤化纤维素（MFC），并通过FTIR，WAXRD和TGA对其进行表征。 MFC是通过碱处理，NaClO_（2）漂白和酸水解等几个步骤合成的。通过三种不同的H_（2）SO_（4）浓度（1N，3N和5N）进行酸水解，而其他条件保持不变。 MFC在FTIR光谱中显示出相同的峰。使用FTIR光谱检测到高浓度的酸，从而在MFC制备过程中发生了氧化反应。通过WAXRD曲线的16.2o和22.2o（2θ角）处的峰来测量制备的MFC的结晶度指数。结晶度指数随酸浓度的增加而增加，直至1N H_（2）SO_（4），然后降低。 TGA结果表明，与漂白浆相比，MFC降解的温度更早。在漂白纸浆水解过程中，随着酸浓度的增加，差示热重曲线（DTG）的峰移至较低的温度。

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