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Citation: Xue-qing Qiu, Su-ya Wang, Ming-song Zhou. Solution Behaviors of Sulfonated Alkali Lignin and Sulfonated Alkali Lignin Polyethenoxy Ether[J]. Acta Polymerica Sinica, ;2016, (4): 477-485. doi: 10.11777/j.issn1000-3304.2016.15245 shu

Solution Behaviors of Sulfonated Alkali Lignin and Sulfonated Alkali Lignin Polyethenoxy Ether

Xue-qing Qiu ^1,2,3 ,
Su-ya Wang ^1,2,3 ,
Ming-song Zhou ^1,2,3,,

1.
1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640
2.
2. State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640
3.

Corresponding author: Ming-song Zhou, mszhou@scut.edu.cn
Received Date: 6 September 2015
Revised Date: 28 October 2015

The sulfonated alkali lignin (SAL) with different sulfonic group contents and the sulfonated alkali lignin polyethenoxy ether (SAL-PEG) with different crosslinking degrees and molecular weights were prepared.The effects of the sulfonic acid group content and the PEG nonionic long chain on the behaviors of SAL and SAL-PEG in solution were studied by dynamic light scattering (DLS).The results showed that the aggregation behavior existed in 1.0 g/L SAL aqueous solutions.And the degree of aggregation decreased with increasing the sulfonic acid group content of SAL, because the more sulfonic acid groups caused the increasing molecular stretch degree of SAL.The addition of 2 mol/L NaCl made the molecular configuration of SAL become compact in solution and the aggregates of SAL were disaggregated evidently.The SAL-PEG mainly took the form of single molecule in 1.0 g/L aqueous solution, with weak aggregation behavior, and the hydrodynamic radius (Rh) of SAL-PEG was proportional to its molecular weight and the crosslinking degree.The addition of 2 mol/L NaCl made the PEG nonionic long chain of SAL-PEG become compact severely in solution, and Rh of SAL-PEG was significantly reduced.Meanwhile the degree of reduction was proportional to its molecular weight and cross-linking degree, but the degree of aggregation of SAL-PEG was still weak.
- Alkali lignin,
- Sulfonated alkali lignin,
- Sulfonated alkali lignin polyethenoxy ether,
- Solution behavior,
- Aggregation,
- Dynamic light scattering
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