| Título: | Homogeneous Esterification of Eucalyptus with Palmitoyl Chloride at Room Temperature |
| Autores: |
Zhang, Ai-Ping; Institute of New Energy and New Material, South China Agricultural University, Guangzhou 510642, P. R. China Mei, Lian; Institute of New Energy and New Material, South China Agricultural University, Guangzhou 510642, P. R. China Zhao, Zhi-Zeng; Water Supply and Drainage Management Office of Zhucheng Xie, Jun; Institute of New Energy and New Material, South China Agricultural University, Guangzhou 510642, P. R. China Liu, Chuan-Fu; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, P. R. China Sun, Run-Cang; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, P. R. China; College of Material Science and Technology, Beijing Forestry University, |
| Fecha: | 2013-05-01 |
| Publicador: | Bioresources |
| Fuente: |
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| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Tema: | Esterification; Homogeneous; Room temperature; CP/MAS 13C-NMR; DMSO/NMI |
| Descripción: | Homogenous chemical modification of ball-milled eucalyptus wood with palmitoyl chloride was investigated using a dimethyl sulfoxide/N-methylimidazole solvent system at room temperature. The parameters were optimized, including the reaction time and the dosage of palmitoyl chloride. The results indicated that prolonging the reaction time from 15 min to 120 min resulted in an increase in the weight percentage gain (WPG) of eucalyptus from 9.5 to 22.8%, while a further increase of the reaction time to 180 min led to an increase in WPG of 19.3%. An increase of the mass ratio of palmitoyl chloride-to-wood from 1:2 to 5:1 resulted in an improvement of WPG from 8.7 to 46.0%, while a further increase of the mass ratio of palmitoyl chloride-to-wood to 6:1 led to a decrease in WPG (39.7%). The physico-chemical properties of the esterified wood were investigated with FT-IR and CP/MAS 13C-NMR spectroscopies. The results indicated that the palmitoyl ester group was successfully attached to the eucalyptus. The esterification of lignin and carbohydrates occurred at room temperature and the thermal stability of eucalyptus increased after esterification. |
| Idioma: | Inglés |