以橙皮苷得率为指标,采用溶剂热法提取陈皮中的橙皮苷,通过单因素实验考察了提取温度、乙醇浓度、液料比以及提取时间对橙皮苷得率的影响。在此基础上,利用正交实验法对溶剂热法提取工艺进行了优化。结果表明:提取时间对橙皮苷的得率影...以橙皮苷得率为指标,采用溶剂热法提取陈皮中的橙皮苷,通过单因素实验考察了提取温度、乙醇浓度、液料比以及提取时间对橙皮苷得率的影响。在此基础上,利用正交实验法对溶剂热法提取工艺进行了优化。结果表明:提取时间对橙皮苷的得率影响最大,其次是提取温度。优选的橙皮苷提取条件为:提取温度120℃,乙醇浓度60%,液料比70∶1 m L·g-1,提取时间45 min,在上述条件下测得橙皮苷得率为6.07%±0.03%。同传统的乙醇回流法相比,溶剂热法的提取时间缩短了近70%,橙皮苷得率约提高1倍。展开更多
By using Bi(S2CNEt2)3 as single-source precursor, Bi2S3 nanoflowers and nanorods have been obtained via a solvothermal treatment. The effect of water, ethylene glycol and polyethylene glycol as reaction medium on the ...By using Bi(S2CNEt2)3 as single-source precursor, Bi2S3 nanoflowers and nanorods have been obtained via a solvothermal treatment. The effect of water, ethylene glycol and polyethylene glycol as reaction medium on the structure and shape of Bi2S3 nanosized materials was investigated, and Bi2S3 nanoflowers and nanorods were characterized by SEM, TEM and XRD.展开更多
用聚吡咯(PPy)对溶剂热法制备的Fe_3O_4纳米颗粒进行表面修饰,再用聚苯胺(PANI)调控Fe_3O_4@PPy复合材料的电磁组成,制备出具有核壳结构的Fe_3O_4@PPy@PANI复合吸波材料.当PPy对Fe_3O_4纳米颗粒修饰后,PANI极易包覆在纳米颗粒表面.电磁...用聚吡咯(PPy)对溶剂热法制备的Fe_3O_4纳米颗粒进行表面修饰,再用聚苯胺(PANI)调控Fe_3O_4@PPy复合材料的电磁组成,制备出具有核壳结构的Fe_3O_4@PPy@PANI复合吸波材料.当PPy对Fe_3O_4纳米颗粒修饰后,PANI极易包覆在纳米颗粒表面.电磁性能分析结果表明,当苯胺(An)与Fe_3O_4@PPy质量比为1/4时,最小反射损耗值(RLmin)达到-39.2 d B;当An与Fe_3O_4@PPy的质量比为1/2时,反射损耗小于-10d B的频宽达到4.6 GHz.电磁成分比例对复合材料的吸波性能有较大的影响,随着聚苯胺含量的增加,电磁吸收呈现先增加后减小的趋势.展开更多
文摘以橙皮苷得率为指标,采用溶剂热法提取陈皮中的橙皮苷,通过单因素实验考察了提取温度、乙醇浓度、液料比以及提取时间对橙皮苷得率的影响。在此基础上,利用正交实验法对溶剂热法提取工艺进行了优化。结果表明:提取时间对橙皮苷的得率影响最大,其次是提取温度。优选的橙皮苷提取条件为:提取温度120℃,乙醇浓度60%,液料比70∶1 m L·g-1,提取时间45 min,在上述条件下测得橙皮苷得率为6.07%±0.03%。同传统的乙醇回流法相比,溶剂热法的提取时间缩短了近70%,橙皮苷得率约提高1倍。
文摘By using Bi(S2CNEt2)3 as single-source precursor, Bi2S3 nanoflowers and nanorods have been obtained via a solvothermal treatment. The effect of water, ethylene glycol and polyethylene glycol as reaction medium on the structure and shape of Bi2S3 nanosized materials was investigated, and Bi2S3 nanoflowers and nanorods were characterized by SEM, TEM and XRD.
文摘用聚吡咯(PPy)对溶剂热法制备的Fe_3O_4纳米颗粒进行表面修饰,再用聚苯胺(PANI)调控Fe_3O_4@PPy复合材料的电磁组成,制备出具有核壳结构的Fe_3O_4@PPy@PANI复合吸波材料.当PPy对Fe_3O_4纳米颗粒修饰后,PANI极易包覆在纳米颗粒表面.电磁性能分析结果表明,当苯胺(An)与Fe_3O_4@PPy质量比为1/4时,最小反射损耗值(RLmin)达到-39.2 d B;当An与Fe_3O_4@PPy的质量比为1/2时,反射损耗小于-10d B的频宽达到4.6 GHz.电磁成分比例对复合材料的吸波性能有较大的影响,随着聚苯胺含量的增加,电磁吸收呈现先增加后减小的趋势.
