Measurement of Surface Properties on Fine Ground Product by Laser-Raman Spectrum

激光拉曼光谱测量细磨产品的表面特性

• 批准号: 01550749
• 负责人: OSHIMA Toshio
• 金额: $ 1.34万
• 依托单位: Himeji Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550749/
• 关键词: Raman spectrum; Planetary mill grinding; Mechano-chemical reaction; Surface treatment; Hydrophobic treatment; Infrared spectrum; Fine powder; Ball mill grinding; レ-ザ-ラマン分光; メカノケミストリ-; 粉砕; 遊星ミル

The surface nature of quartz powder pulverized in a hexane solution of cetyl alcohol by a ball mill or a planetary mill was studied. The original quartz powder showed itself to be hydrophilic since it dispersed in water. But the surface nature of quartz after pulverization for 5 minutes at 730rpm or 40 minutes at 540rpm by a planetary mill changed to be hydrophobic since the powder floats on water.The surface nature of fine ground products was investigated by laser-Raman spectrum and infrared spectrum. From their Raman spectra, three peaks (467cm<@1-1>D1, 212cm<@D1-1@>D1 130cm<@D1-1@>D1) caused by inverse symmetrical stretching vibration of silica molecules are decreasing with pulverization, and there are no peaks except a very weak peak at 467cm<@D1-1@>D1 on hydrophobic powder. From their infrared spectra, two peaks (2940cm<@D1-1@>D1, 2850cm<@D1-1@>D1) caused by stretching vibration of methyl group on the particle surface can be measured on hydrophobic powder. These results shows that the surface of quartz particle is covered with hydrophobic group which comes from cetyl alcohol. In contrast, there are almost no spectra change for the hydrophilic powder by pulverized in a distilled water.Accordingly, the quartz powder was found to be surfaced treated effectively due to mechano-chemical reaction by pulverization. The change of surface nature of powder can be measured by laser-Raman spectrum and infrared spectrum.

研究了石英粉在十六醇己烷溶液中用球磨机和行星磨机粉碎后的表面性质。原来的石英粉在水中分散，表现出亲水性。但是，石英在行星磨机730rpm下粉碎5分钟或540rpm下粉碎40分钟后，由于粉末浮在水面上，其表面性质改变为疏水性。利用激光拉曼光谱和红外光谱研究了细磨产物的表面性质。从它们的拉曼光谱上看，二氧化硅分子逆对称拉伸振动产生的三个峰（467cm< @D1-1@>D1, 212cm<@D1-1@>D1, 130cm<@D1-1@>D1）随着粉末的粉碎而减小，在疏水粉末上除了467cm<@D1-1@>D1处有一个很弱的峰外，没有其他峰。从它们的红外光谱中，在疏水粉末上可以测到两个峰（2940cm<@D1-1@>D1, 2850cm<@D1-1@>D1），它们是由颗粒表面甲基的拉伸振动引起的。结果表明，石英颗粒表面覆盖有来自十六醇的疏水性基团。而在蒸馏水中粉碎后，亲水性粉末的光谱几乎没有变化。结果表明，石英粉体在粉碎过程中发生机械化学反应，表面处理效果较好。利用激光拉曼光谱和红外光谱可以测量粉末表面性质的变化。