کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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238974 | 465787 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of surface-adhered nanoparticles and nanoporous structure on bulk flowability of silica Influence of surface-adhered nanoparticles and nanoporous structure on bulk flowability of silica](/preview/png/238974.png)
Nanoporous spherical silica particles with nanoparticles adhered to their surfaces and mica powder are generally used in cosmetic powders. To analyze the effect of surface-adhered nanoparticles and nanopores on bulk flowability, nanoparticles adhered to silica surfaces were removed by ultrasonic cleaning using water. To investigate the influence of the nanoporous structure of silica, nonporous silica (with a mean particle diameter of 5 μm) with adhered nanoparticles was used. The bulk flowabilities of the mixtures of mica and silica powder with and without surface-adhered nanoparticles were characterized by using a friction tester and texture analyzer. The coefficient of dynamic friction (CDF) decreased for both the mixed powders due to the removal of nanoparticles. On the other hand, the aggregation strength (AS) increased due to the cleaning of nanoparticles.
The bulk flowabilities of the mixtures of mica and silica powder with and without the surface-adhered nanoparticles were characterized. The coefficient of dynamic friction decreased for both the mixed powders due to the removal of nanoparticles. On the other hand, the aggregation strength increased due to the cleaning of nanoparticles.Figure optionsDownload as PowerPoint slide
Journal: Powder Technology - Volume 176, Issues 2–3, 20 July 2007, Pages 108–113