Spectral analysis of the chemical structure of carboxymethylated cellulose produced by green synthesis from coir fibre
Spectral analysis of the chemical structure of carboxymethylated cellulose produced by green synthesis from coir fibre
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DOI：
10.1016/j.ctmat.2016.05.007
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发表时间：
2017-05-01
期刊：
影响因子：
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通讯作者：
Aigbodion, A. I.
中科院分区：
文献类型：
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作者：
Ikhuoria, E. U.;Omorogbe, S. O.;Aigbodion, A. I.
在这项工作中，从椰芯纤维中获得的纤维素合成了CMC。得到的CMC产率约为64.0%。所得取代度为0.44。用FT-IR、X射线衍射仪和TGA/DTG对合成的CMC和纤维素进行了光谱分析和热重分析。纤维素和CMC的表征表明，它们的结晶度较高，而纤维素的结晶度较低，这是因为其木质素含量较高。CMC还表现出较高的结晶度(56.93%)和氢键，与一些早期文献报道的CMC相比。DTG曲线表明，CMC在310℃左右降解速率最大，FT-IR图谱显示出CMC的指纹区特征(1590 cm(-1))。这项工作表明，CMC的光谱特性和结晶度可能与在CMC合成之前获得纤维素所采用的合成方法有关。(C)2017年葡萄牙材料学会。作者：Elsevier Espana，S.L.U。版权所有。
In this work, CMC was synthesized from cellulose obtained from coir fibres. The obtained CMC yield was about 64.0 %. The Degree of Substitution value obtained was 0.44. The spectral pattern and thermogravimetric analysis of the synthesized CMC and cellulose were evaluated using FT-IR, XRD, and TGA/DTG. Characterization of the cellulose and CMC revealed their high crystallinity with cellulose showing a lower crystallinity value due to its lignin content. The CMC also showed a higher degree of crystallinity (56.93%) and hydrogen bonding compared to some earlier literature reports for CMC. The DTG curve revealed that the CMC had a maximum rate of degradation at about 310 degrees C. The FT-IR spectra of the obtained CMC showed a finger print region characteristic of CMC (1590 cm(-1)). This work shows that the spectral characteristic and crystallinity of CMC can be related to the synthetic method applied in obtaining the cellulose prior to CMC synthesis. (C) 2017 Portuguese Society of Materials (SPM). Published by Elsevier Espana, S.L.U.. All rights reserved.