DDP-coated Sn nanoparticles were prepared by ultrasonic irradiation method. The nanoparticles were found to be well dispersed and coated with the surfactant DDP. The tetragonal phase of the as-prepared nanoparticles w...DDP-coated Sn nanoparticles were prepared by ultrasonic irradiation method. The nanoparticles were found to be well dispersed and coated with the surfactant DDP. The tetragonal phase of the as-prepared nanoparticles was characterized by selected area electron diffraction (SAED) and X-ray diffraction (XRD). In addition, the powder was found to have an excellent antiwear property by tribological test.展开更多
以水杨酸和乙酸酐为原料,固体氢氧化钠为催化剂,采用超声辐射快速合成阿司匹林,用正交实验筛选出最佳合成条件为:n(水杨酸)∶n(乙酸酐)=1∶2.5,超声辐射功率160 W,催化剂用量为水杨酸质量的10%,反应温度40℃,辐射时间8 m in,产率93.0%...以水杨酸和乙酸酐为原料,固体氢氧化钠为催化剂,采用超声辐射快速合成阿司匹林,用正交实验筛选出最佳合成条件为:n(水杨酸)∶n(乙酸酐)=1∶2.5,超声辐射功率160 W,催化剂用量为水杨酸质量的10%,反应温度40℃,辐射时间8 m in,产率93.0%。研究表明该法具有操作简单、快速、后处理简单、产率高的特点,符合清洁生产的要求。展开更多
文摘DDP-coated Sn nanoparticles were prepared by ultrasonic irradiation method. The nanoparticles were found to be well dispersed and coated with the surfactant DDP. The tetragonal phase of the as-prepared nanoparticles was characterized by selected area electron diffraction (SAED) and X-ray diffraction (XRD). In addition, the powder was found to have an excellent antiwear property by tribological test.
文摘以水杨酸和乙酸酐为原料,固体氢氧化钠为催化剂,采用超声辐射快速合成阿司匹林,用正交实验筛选出最佳合成条件为:n(水杨酸)∶n(乙酸酐)=1∶2.5,超声辐射功率160 W,催化剂用量为水杨酸质量的10%,反应温度40℃,辐射时间8 m in,产率93.0%。研究表明该法具有操作简单、快速、后处理简单、产率高的特点,符合清洁生产的要求。
