1. Institute of Materials Science, Federal University of Sao Francisco Valley, Juazeiro 48920-310, BA, Brazil
2. Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, Porto Alegre 9500, Rio Grande do Sul, Brazil
3. Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology, Umeå 90183, Sweden