Startseite Light scattering characterization of lignosulfonate structure in saline solutions
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Light scattering characterization of lignosulfonate structure in saline solutions

  • Yong Qian , Yonghong Deng EMAIL logo , Yunqing Guo , Hao Li und Xueqing Qiu EMAIL logo
Veröffentlicht/Copyright: 10. Oktober 2014
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Holzforschung
Aus der Zeitschrift Holzforschung Band 69 Heft 4

Abstract

The solution behavior and molecular conformation of sodium lignosulfonates (NaLS) in saline solution has been studied by means of static and dynamic light scattering (LSstat and LSdyn). Results show that the salt content must be larger to eliminate the slow mode in LSdyn analysis of NaLS than that of the theory, and this discrepancy can only be explained by a modified microgel model. The higher salt amount is needed for the formation of a strong ionic gradient field between surface and the inner part of NaLS, which forces counter ions to penetrate into the inner part of NaLS to screen the small amount of charges. The NaLS single molecular shape can be described by an oblate spheroid based on the absolute molecular weight Mw and diffusion coefficients D. The best fitting result is semiaxis a=1.6 nm and axial ratio r=3.5, D=5.73×10-7 cm2 s-1, and the corresponding Mw=1.7×105 g mol-1.

Keywords: calculation of oblate spheroids; conformation of lignosulfonates; disaggregation; dynamic light scattering; J-aggregates; lignosulfonates; modified microgel model; molecular aggregation; molecular disperse solution; oblate spheroids; polyelectrolytes; sodium lignosulfonate (NaLS); static light scattering
Corresponding authors: Yonghong Deng and Xueqing Qiu: School of Chemistry and Chemical Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, P.R. China, Phone: +86-20-87114722, Fax: +86-20-87114721, e-mail: ,

Acknowledgments

The authors are grateful for the financial support of National Basic Research Program of China (973 Program) (2012CB215302), and the National Natural Science Foundation of China (21374032). Yong Qian would like to acknowledge the China Scholarship Council (CSC) for supporting his visit at McMaster.

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Received: 2014-4-3
Accepted: 2014-9-17
Published Online: 2014-10-10
Published in Print: 2015-5-1

©2015 by De Gruyter

Artikel in diesem Heft

  1. Frontmatter
  2. Review Articles
  3. A large-scale test set-up for measuring VOC emissions from wood products under laboratory conditions in simulated real rooms
  4. Industrial waste water for biotechnological reduction of aldehyde emissions from wood products
  5. Original Articles
  6. Light scattering characterization of lignosulfonate structure in saline solutions
  7. Differences in wood properties of Picea abies L. Karst. in relation to site of provenance and population genetics
  8. Rapid determination of biomass and polypropylene in three types of wood plastic composites (WPCs) using FTIR spectroscopy and partial least squares regression (PLSR)
  9. Thermal modification of Southern pine combined with wax emulsion preimpregnation: effect on hydrophobicity and dimensional stability
  10. Mixed-mode fracture toughness of bond lines of PRF and PUR adhesives in European beech wood
  11. Effect of specimen dimension and pre-heating temperature on supercritical CO2 dewatering of radiata pine sapwood
  12. Sound absorption of wood-based materials
  13. Threshold for ion movements in wood cell walls below fiber saturation observed by X-ray fluorescence microscopy (XFM)
  14. Oxygen plasma treatment of bamboo fibers (BF) and its effects on the static and dynamic mechanical properties of BF-unsaturated polyester composites
  15. A combined view on composition, molecular structure, and micromechanics of fungal degraded softwood
  16. Morphological changes induced in wood samples by aqueous NaOH treatment and their effects on the conversion of cellulose I to cellulose II
  17. Young’s modulus and shear modulus of solid wood measured by the flexural vibration test of specimens with large height/length ratios
  18. Effects of cell wall ultrastructure on the transverse shrinkage anisotropy of Scots pine wood
  19. Short Note
  20. Reacted copper(II) concentrations in earlywood and latewood of micronized copper-treated Canadian softwood species
https://doi.org/10.1515/hf-2014-0105
Schlagwörter für diesen Artikel
calculation of oblate spheroids; conformation of lignosulfonates; disaggregation; dynamic light scattering; J-aggregates; lignosulfonates; modified microgel model; molecular aggregation; molecular disperse solution; oblate spheroids; polyelectrolytes; sodium lignosulfonate (NaLS); static light scattering

Artikel in diesem Heft

  1. Frontmatter
  2. Review Articles
  3. A large-scale test set-up for measuring VOC emissions from wood products under laboratory conditions in simulated real rooms
  4. Industrial waste water for biotechnological reduction of aldehyde emissions from wood products
  5. Original Articles
  6. Light scattering characterization of lignosulfonate structure in saline solutions
  7. Differences in wood properties of Picea abies L. Karst. in relation to site of provenance and population genetics
  8. Rapid determination of biomass and polypropylene in three types of wood plastic composites (WPCs) using FTIR spectroscopy and partial least squares regression (PLSR)
  9. Thermal modification of Southern pine combined with wax emulsion preimpregnation: effect on hydrophobicity and dimensional stability
  10. Mixed-mode fracture toughness of bond lines of PRF and PUR adhesives in European beech wood
  11. Effect of specimen dimension and pre-heating temperature on supercritical CO2 dewatering of radiata pine sapwood
  12. Sound absorption of wood-based materials
  13. Threshold for ion movements in wood cell walls below fiber saturation observed by X-ray fluorescence microscopy (XFM)
  14. Oxygen plasma treatment of bamboo fibers (BF) and its effects on the static and dynamic mechanical properties of BF-unsaturated polyester composites
  15. A combined view on composition, molecular structure, and micromechanics of fungal degraded softwood
  16. Morphological changes induced in wood samples by aqueous NaOH treatment and their effects on the conversion of cellulose I to cellulose II
  17. Young’s modulus and shear modulus of solid wood measured by the flexural vibration test of specimens with large height/length ratios
  18. Effects of cell wall ultrastructure on the transverse shrinkage anisotropy of Scots pine wood
  19. Short Note
  20. Reacted copper(II) concentrations in earlywood and latewood of micronized copper-treated Canadian softwood species
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