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Modified Lignin as an Environmentally Friendly Surfactant

G. Shulga, V. Shakels, S. Skudra, V. Bogdanovs

Abstract


The effect of softwood sulphate lignin modified by its oxidation in alkaline medium on its behaviour at the air-water and oil-water interface, where rapeseed oil and technical fish fat oil served as the oil phase, was investigated. It has been found that, irrespective of the рН values of the water solution, the ability of the modified lignin to be adsorbed at the interfaces exceeds that of unmodified lignin, which is obviously caused by the pronounced differentiation of the hydrophilic and hydrophobic parts of the molecular structure in the oxidised lignin and the decrease in the content of the high-molecular fraction (Mw is greater than 1000) in it. At low concentrations (≤ 0.01 g/dl), the stabilising action of the modified lignin in the rapeseed oil-water emulsion is the same as that of sodium dodecyl sulphate. The enhanced surface activity of the oxidised sulphate lignin enables it not only to substitute the 30% of the mass of the commercial surfactant in the detergent composition for washing stainless steel plates, used during fish smoking, but also to upgrade its properties.

Keywords


detergent composition; fish smoking; modified lignin; oil-in-water emulsion; stabiliser; surface tension

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References


Benvegnu, T., Plusquellec, D., Lemiègre, L. Monomers, polymers and composites from renewable resources. Elsevier, Amsterdam, 2008.

Roussel, M., Benvegnu, T., Lognoné, V., Le Deit, H., Soutrel, I., Laurent, I., Plusquellec, D. Synthesis and physico-chemical properties of novel biocompatible alkyl d-mannopyranosiduronate surfactants derived from alginate. Eur. J. Org. Chem., 14, 2005, p. 3085-3094.

Goursaud, F., Berchel, M., Guilbot, J., Legros, N., Lemiègre, L., Marcilloux, J., Plusquellec, D., Benvegnu, T. Glycine betaine as a renewable raw material to „greener” new cationic surfactants. Green Chem., 10 (3), 2008, p. 310-320.

Sarkanen, K.V., Ludwig, C.H. (Eds.). Lignins: occurrence, formation, structure and reactions. John Wiley & Sons, New York, 1971.

Moeller, T., Soldanski, H-D., Kuech, S., Noglich, J. Multiphase cleaning composition containing lignin sulfonate. U.S. Patent 6,288,015, 2001.

Yang, D., Qiu, X., Zhou, M., Lou, H. Properties of sodium lignosulfonate as dispersant of coal water slurry. Energy Conversion and Management, 48(9), 2007, p. 2433-2438.

Lin, S.Y., Dence, C.W. (Eds.). Methods in lignin chemistry. Springer-Verlag, Berlin-Heidelberg, 1992, p. 568.

Shulga, G., Bikova, T., Priede, V., Treimanis, A. Chemical transformations in kraft-lignin matrix during long-term alkali oxidation. Chemical Technology, 1(35), 2005, p. 80-84.

Zakis, G.F. Functional analysis of lignins and their derivatives. Tappi Press, Atlanta, 1994.

Shulga, G., Priede, V., Shakels, V., Bikova, T., Treimanis, A. Behavior of oxidized kraft lignin as a “core-shell” polymer in aqueous solutions. Abstracts of the 39th IUPAC Congress "Chemistry at the Interfaces" and the 86th Conference of the Canadian Society for Chemistry. Ottawa, Canada, 10-15 August, 2003, p. 271.

Sodium lauryl sulfate [retrieved on 14.02.2011], website: http://en.wikipedia.org/wiki/Sodium-lauryl-sulfate.




DOI: https://doi.org/10.17770/etr2011vol1.919

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