Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 320, Issue 1-3, Pages 57-60Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2008.01.012
Keywords
lignin; lignosulfonates; surface properties; FTIR spectroscopy; wicking technique
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The comparison of the FTIR spectra indicated that the sulfonation without caused changes in the main structure of lignin and only in the lignin chains. The surface properties, e.g. the surface free energy and related components, e.g. the Lifshitz-van der Waals and Lewis acid-base interactions components, of lignin and lignosulfonates, LGSs, with different ions, e.g. Na+-, Mg2+-, and Ca2+-, studied and compared by wicking technique indicated that the surface free energy of lignin is lower than that of all used LGSs. This suggests that the sulfonation can enhance the surface property for lignin by increasing of the Lifshitz-van der Waals component and Lewis base component of lignin. (C) 2008 Elsevier B.V. All rights reserved.
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