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Journal of Dispersion Science and Technology Volume 36, 2015 - Issue 4
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Original Articles

Structure and Properties of Sodium Lignosulfonate with Different Molecular Weight Used as Dye Dispersant

Dongjie Yang School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, P. R. China
,
Huijing Li School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
,
Yanlin Qin School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
,
Ruisheng Zhong School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
,
Mengxian Bai School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
&
XueQing Qiu School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, P. R. ChinaCorrespondence[email protected]
Pages 532-539 | Received 29 Mar 2014, Accepted 15 Apr 2014, Published online: 14 Nov 2014
 
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Abstract

Three purified sodium lignosulfonates (SLs) with different molecular weights were prepared by ultrafiltration. The structural characteristics of SL and their effects on the properties of dye were investigated. When the molecular weight is increased, the chroma, purity, and the content of guaiacyl of SL increases, whereas the phenolic hydroxyl, carboxyl, and sulfonic groups in SL decrease, the dispersibility, heat stability properties, and dyeing rate of SL on dye improve, and the fiber staining of SL weakens at high concentration. The fraction of SL with the cutoff molecular weight above 2.5 kDa has the weakest reduction effect on dyestuffs.

GRAPHICAL ABSTRACT

Notes

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