Article information
Abstract
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°C. The FT-IR spectra of the obtained CMC showed a finger print region characteristic of CMC (1590cm-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.
Keywords:
carboxymethylcellulose
spectral pattern
coir fibres
cellulose
liquid phase oxidation
degree of substitution
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