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.

研究了用球磨机或行星式磨机在鲸蜡醇的己烷溶液中粉碎的石英粉的表面性质。原始石英粉由于分散在水中而表现出亲水性。但用行星式磨机以730rpm粉碎5分钟或以540rpm粉碎40分钟后，由于粉末浮在水面上，石英的表面性质转变为疏水性。通过激光拉曼光谱和红外光谱研究了细磨产品的表面性质。从拉曼光谱来看，二氧化硅分子反对称伸缩振动引起的三个峰（467cm<@1-1>D1、212cm<@D1-1>>D1、130cm<@D1-1>>D1）随着粉碎而减少，并且疏水性粉末上除了467cm<@D1-1@>D1处的一个非常弱的峰外没有其他峰。从它们的红外光谱中，可以在疏水性粉末上测量由颗粒表面上的甲基伸缩振动引起的两个峰(2940cmD1-1D1、2850cmD1-1D1)。这些结果表明石英颗粒的表面覆盖有来自鲸蜡醇的疏水基团。相比之下，通过在蒸馏水中粉碎的亲水性粉末几乎没有光谱变化。因此，发现由于粉碎的机械化学反应，石英粉末被有效地进行了表面处理。粉末表面性质的变化可以通过激光拉曼光谱和红外光谱来测量。