Preparation and Evaluation of Carboxymethylated Lignin as Dispersant for Aqueous Graphite Suspension Using Turbiscan Lab Analyzer

Carboxymethylated lignin (CML) was prepared from wheat straw alkali lignin (WAL) via carboxymethylation modification. The characterizations using FTIR, 13 C NMR, and 1 H- 13 C HSQC NMR suggest that carboxyl groups are introduced into WAL structure successfully and there are two different active site...

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Bibliographic Details
Published in:Journal of dispersion science and technology 2013-05, Vol.34 (5), p.644-650
Main Authors: Gan, Linhuo, Zhou, Mingsong, Yang, Dongjie, Qiu, Xueqing
Format: Article
Language:English
Subjects:
Carboxymethylation
Chemistry
Colloidal state and disperse state
dispersion stability
Dispersions
Dosage
Exact sciences and technology
General and physical chemistry
Graphite
graphite suspension
Nuclear magnetic resonance
Stability
Straw
wheat straw alkali lignin
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Summary:Carboxymethylated lignin (CML) was prepared from wheat straw alkali lignin (WAL) via carboxymethylation modification. The characterizations using FTIR, 13 C NMR, and 1 H- 13 C HSQC NMR suggest that carboxyl groups are introduced into WAL structure successfully and there are two different active sites substituted by carboxymethyl groups. Moreover, the dispersion efficiency of CML was evaluated using the Turbiscan Lab analyzer. Effects of CML dosage and suspension pH on the dispersion stability of aqueous graphite suspension were investigated. The result shows that the dispersion stability of aqueous graphite suspension prepared with CML of 1.0% dosage at suspension pH 6.7 is obviously improved.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691.2012.686248