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Flowability Modification of Lactose Powder by Plasma Enhanced Chemical Vapor Deposition
Author(s) -
Spillmann Adrian,
Sonnenfeld Axel,
von Rohr P. R.
Publication year - 2007
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200730202
Subject(s) - hexamethyldisiloxane , plasma enhanced chemical vapor deposition , materials science , chemical vapor deposition , chemical engineering , deposition (geology) , oxygen , substrate (aquarium) , analytical chemistry (journal) , argon , volumetric flow rate , lactose , plasma , chromatography , chemistry , nanotechnology , organic chemistry , paleontology , physics , oceanography , quantum mechanics , sediment , geology , engineering , biology
Abstract The surface of 5.5 µm lactose particles was modified by gas phase reactions in a plasma enhanced chemical vapor deposition process to increase the flowability of the bulk solid. The particles were treated in the radio frequency plasma zone (RF) of a downer reactor, using a process gas mixture of oxygen, argon, and hexamethyldisiloxane (HMDSO). By increasing the flow rate of HMDSO (17–103 sccm) and the RF‐power (50–200 W), respectively, the flowability can be increased up to a factor of 2 compared to the untreated substrate material. No significant change in flowability was observed by varying the oxygen‐to‐HMDSO ratio from 5 to 30.