A new reaction system was designed to economically convert glucose to lactic acid environment-friendly. Hydrophobic ionic liquids were chosen as solvent that can promote the decomposition reaction of glucose, and the ...A new reaction system was designed to economically convert glucose to lactic acid environment-friendly. Hydrophobic ionic liquids were chosen as solvent that can promote the decomposition reaction of glucose, and the catalytic performance of the solid bases was evaluated. Both the reaction temperature and time can affect the yield of lactic acid. A high yield （97%） of lactic acid was achieved under the optimal reaction condition. The IH NMR spectra and HPLC-MS were used to identify the formation of the lactic acid and variations of ionic liquid. It is found that ionic-liquids have a unique solvent effect for glucose and bases. Water can be used as solvent to extract calcium lactate. This shows a great potential of hydrophobic ionic liquids in the solid bases catalyzed reaction that is limited by the weak solubility of solid bases in organic and water solution.展开更多
本文中以美国食品药品监督管理局(Food and Drug Administration,FDA)批准的食品添加剂月桂酰肌氨酸钠和氨基酸为原料,采用简单的质子交换反应合成了2种氨基酸基离子液体Lys-LS和Arg-LS,并将其用作水基润滑添加剂.利用SRV-V微动摩擦磨...本文中以美国食品药品监督管理局(Food and Drug Administration,FDA)批准的食品添加剂月桂酰肌氨酸钠和氨基酸为原料,采用简单的质子交换反应合成了2种氨基酸基离子液体Lys-LS和Arg-LS,并将其用作水基润滑添加剂.利用SRV-V微动摩擦磨损试验机和全自动真彩共聚焦显微镜考察了2种离子液体添加剂的摩擦学性能,并采用扫描电镜(SEM)、石英晶体微天平(QCM)和X射线光电子能谱仪(XPS)深入探究了其润滑机理.研究结果表明:2种氨基酸基离子液体添加剂具有良好的热稳定性且可以显著抑制铸铁在水中的腐蚀.与去离子水相比,当Lys-LS和Arg-LS的添加质量分数为0.5%时,水基润滑液的摩擦系数和磨损体积分别降低了约70%和85%,具有显著的减摩抗磨效果.机理分析结果表明,离子液体在界面处形成的摩擦化学反应膜与物理/化学吸附膜协同作用,有效地阻止了滑动摩擦副之间的直接接触,进而赋予水基润滑液优异的摩擦学性能.2种润滑添加剂制备简单,安全无毒且绿色环保,有望作为水基金属加工液和难燃液压液的关键润滑添加剂使用.展开更多
基金Project(2006BAE02B05) supported by the Key Projects in the National Science and Technology Pillar Program During the 11th Five-year Plan PeriodProject(2005CB221406) supported by the National Basic Research Program of China
文摘A new reaction system was designed to economically convert glucose to lactic acid environment-friendly. Hydrophobic ionic liquids were chosen as solvent that can promote the decomposition reaction of glucose, and the catalytic performance of the solid bases was evaluated. Both the reaction temperature and time can affect the yield of lactic acid. A high yield （97%） of lactic acid was achieved under the optimal reaction condition. The IH NMR spectra and HPLC-MS were used to identify the formation of the lactic acid and variations of ionic liquid. It is found that ionic-liquids have a unique solvent effect for glucose and bases. Water can be used as solvent to extract calcium lactate. This shows a great potential of hydrophobic ionic liquids in the solid bases catalyzed reaction that is limited by the weak solubility of solid bases in organic and water solution.
文摘本文中以美国食品药品监督管理局(Food and Drug Administration,FDA)批准的食品添加剂月桂酰肌氨酸钠和氨基酸为原料,采用简单的质子交换反应合成了2种氨基酸基离子液体Lys-LS和Arg-LS,并将其用作水基润滑添加剂.利用SRV-V微动摩擦磨损试验机和全自动真彩共聚焦显微镜考察了2种离子液体添加剂的摩擦学性能,并采用扫描电镜(SEM)、石英晶体微天平(QCM)和X射线光电子能谱仪(XPS)深入探究了其润滑机理.研究结果表明:2种氨基酸基离子液体添加剂具有良好的热稳定性且可以显著抑制铸铁在水中的腐蚀.与去离子水相比,当Lys-LS和Arg-LS的添加质量分数为0.5%时,水基润滑液的摩擦系数和磨损体积分别降低了约70%和85%,具有显著的减摩抗磨效果.机理分析结果表明,离子液体在界面处形成的摩擦化学反应膜与物理/化学吸附膜协同作用,有效地阻止了滑动摩擦副之间的直接接触,进而赋予水基润滑液优异的摩擦学性能.2种润滑添加剂制备简单,安全无毒且绿色环保,有望作为水基金属加工液和难燃液压液的关键润滑添加剂使用.
