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Publication Date:
November 2006
ISSN:
1437-434X
DOI:
10.1515/HF.2006.111

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Holzforschung

International Journal of the Biology, Chemistry, Physics, and Technology of Wood

Editor-in-Chief: Faix, Oskar

Editorial Board Member: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Berry, Richard / Burgert, Ingo / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gellerstedt, Göran / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Heitner, Cyril / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Kleen, Marjatta / Koch, Gerald / Lachenal, Dominique / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Pizzi, Antonio / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Schwanninger, Manfred / Sipilä, Jussi / Tamminen, Tarja / Viikari, Liisa / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

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Amphiphilicity of a lignin-carbohydrate complex

Yasumitsu Uraki1 / Yuriko Usukura2 / Takao Kishimoto3 / Makoto Ubukata4

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Corresponding author. Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, N-9, W-9, Kita-ku, Sapporo 060-8589, Japan

Citation Information: Holzforschung. Volume 60, Issue 6, Pages 659–664, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: 10.1515/HF.2006.111, November 2006

Publication History:
Received:
May 15, 2006
Accepted:
September 4, 2006

Abstract

A lignin-carbohydrate complex (LCC) fraction isolated from the residue of milled wood lignin extraction of birch was found to form self-aggregates in water. The aggregates had relatively strong hydrophobic domains, comparable to the hydrophobicity of 80% ethanol. Dynamic light scattering analysis showed that the aggregates were transformed into small particles by sonication with a number-average diameter of 43.7±9.6 nm, and were stable in water. The surface pressure (π)-surface area (A) profile showed that the LCC also formed a monolayer on the water surface. Based on these results, we suggest that the LCC is amphiphilic in nature, despite its insolubility in low-polarity organic solvents.

Keywords: amphiphilicity; dynamic light scattering (DLS); Langmuir-Blodgett (LB) film; lignin-carbohydrate complex (LCC); magnesium 1-anilinonaphtalene-8-sulfonate (ANS); π-A profile; self-aggregation; sonication; static light scattering (SLC)

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