1. A light-colored hydroxypropyl sulfonated alkali lignin for utilization as a dye dispersant.
- Author
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Qin, Yanlin, Mo, Wenjie, Yu, Lixuan, Yang, Dongjie, and Qiu, Xueqing
- Subjects
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LIGNOSULFONATES , *DISPERSING agents , *HYDROXYL group , *NUCLEAR magnetic resonance spectroscopy , *GEL permeation chromatography , *NAPHTHALENE - Abstract
A light-colored hydroxypropyl sulfonated alkali lignin (HSAL) was synthesized based on pine alkali lignin (AL) by grafted-sulfonation and crosslinking reaction processes. The reactions were evaluated by gel-permeation chromatography (GPC), infrared (IR) and proton nuclear magnetic resonance (1H-NMR) spectroscopy. The sulfonic group content and the molecular weight ( M w) of HSAL significantly increased, while the phenolic hydroxyl groups diminished by around 80% compared to AL. The color of HSAL turned to light yellow compared to the dark brown color of AL, that is, it stained less the fiber. The dispersity, heat stability, and dye uptake of dye bath with HSAL was significantly improved compared to sodium lignosulfonate, sulfomethylated AL, and dispersants of the naphthalene series. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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