Influence of surface modification on wettability and surface energy characteristics of pharmaceutical excipient powders

Surface modification to improve powder bulk behavior under humid conditions

“…It was observed that starch particles were efficiently coated, with the nano-silica extensively dispersed on the surface. The surface area coverage (SAC) of the nano-coating achieved with 0.5% w/w Aerosil R972 was in the range of 50% also reported in our previous study [28].…”

“…Dry coating of corn starch powder was performed with hydrophobic fumed silica (Aerosil R972) using Co-mill (Prism Pharma Machinery, India) following a method similar to the one described in literature [28,29]. A guest particle loading of 0.5% w/w of the total blend was used for the nano-coating procedure.…”

Characterization of bulk and shear properties of basmati and non‐basmati rice flour

“…AFM measurements were made by scanning probe microscope in tapping mode using a size of 2 × 2 μm . Different regions of five different particles of both basmati rice flour and non‐basmati rice flour were scanned for roughness measurement with NanoScope software (version 8.10) . Results obtained were with respect to geometric average roughness or root mean square (RMS) roughness ( R q ) of the flour surface, defined as the standard deviation of the elevation, z ‐values, within the given area, calculated as follows: where, z ave is the average of the z ‐values within the given area, z i is the z ‐value for a given point and N is the number of points within the given area.…”

Improve surface levelling of powder coating with semi-crystalline polyester resin

“…12 is the SEM micrographs of semi-crystalline and amorphous polyester powder coatings, as illustrated in Fig. 12, the filler was fully dispersed in the semicrystalline polyester powder coating, and lower viscosity help to improve wetting properties [23,24]. All the results showed that the levelling performance of amorphous polyester powder coating was inferior to that of semi-crystalline polyester powder coating.…”