| Title: | Hydrothermal degradation of lignin: products analysis for phenol formaldehyde adhesive synthesis |
| Author(s): | Yang S; Yuan TQ; Li MF; Sun RC; |
| Address: | "Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, 100083 Beijing, China. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, 100083 Beijing, China. Electronic address: ytq581234@bjfu.edu.cn. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, 100083 Beijing, China. Electronic address: rcsun3@bjfu.edu.cn" |
| DOI: | 10.1016/j.ijbiomac.2014.07.048 |
| ISSN/ISBN: | 1879-0003 (Electronic) 0141-8130 (Linking) |
| Abstract: | "Corncob lignin was treated with pressurized hot water in a cylindrical autoclave in current investigation. With the aim of investigating the effect of reaction temperature and retention time on the distribution of degradation products, the products were divided into five fractions including gas, volatile organic compounds, water-soluble oil, heavy oil, and solid residue. It was found that hydrothermal degradation of corncob lignin in pressurized hot water produced a large amount of phenolic compounds with lower molecular weight than the raw lignin. Some phenolic and benzene derivatives monomers such as vanillin, 2-methoxy-phenol, 2-ethyl-phenol, p-xylene, and 1, 3-dimethyl-benzene were also identified in the degradation products. The products were further analyzed by GC-MS, GPC, 2D-HSQC, and (31)P-NMR to investigate their suitability for partial incorporation into phenol formaldehyde adhesive as a substitution of phenol. The results indicated that the reaction temperature had more effect on the products distribution than the retention time. The optimal condition for heavy oil production appeared at 290 degrees C with retention time 0 min. The compounds of heavy oil had more active sites than the raw lignin, suggesting that the heavy oil obtained from hydrothermal degradation of lignin is a promising material for phenol formaldehyde adhesive synthesis" |
| Keywords: | "Adhesives/*chemical synthesis Chemical Fractionation Chromatography, Gel Formaldehyde/*analysis Gas Chromatography-Mass Spectrometry Lignin/*chemistry Magnetic Resonance Spectroscopy Oils/analysis Phenol/*analysis Solubility *Temperature Time Factors Vola;" |
| Notes: | "MedlineYang, Sheng Yuan, Tong-Qi Li, Ming-Fei Sun, Run-Cang eng Research Support, Non-U.S. Gov't Netherlands 2014/08/12 Int J Biol Macromol. 2015 Jan; 72:54-62. doi: 10.1016/j.ijbiomac.2014.07.048. Epub 2014 Aug 8" |
