[1] Research and Development Unit of Textile and Paper Materials, University of Beira Interior, R.Marques d'Avila e Bolama, 6201-001 Covilhã, Portugal
[2] Institute of Materials and Environment Chemistry, Chemical Research Center, Hungarian Academy of Science, P.O. Box 17, H-1525 Budapest, Hungary
[3] Institute of Institute of Paper Science and Technology Atlanta, GA 30318, United States
[4] Budapest University of Technology and Economics, Department of Organic chemistry and Technology, Gellert ter 4, H-1111 Budapest, Hungary