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- W2000003387 abstract "Abstract A method is described for measuring the electrostatic charge generated in powders following contact with a plane substrate. The method uses a Faraday well connected to an electrometer and allows the specific charge of powders to be determined. Of the various drugs and excipients studied, most charged electronegatively following contact with glass surfaces, but became electropositive after contact with polyethylene surfaces. The charge interactions of drug and excipient powders modified the behaviour of ordered mixes formed in similar conditions to those of charge measurement. Powders with like charges formed less stable ordered mixes than those in which drug and excipient particles carried opposite charges. Following triboelectrification in an air cyclone constructed of brass, powders had charges at least 100 times greater than those formed after contact with glass surfaces. Optimization of the triboelectric charging conditions allowed ordered mixes to be prepared in which a maximum electronegative charge was applied to the excipient whilst the drug was given a maximum electropositive charge. Studies of segregation/stability showed that ordered mixes subjected to triboelectrification were less prone to segregation than uncharged powders." @default.
- W2000003387 created "2016-06-24" @default.
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- W2000003387 date "1982-02-01" @default.
- W2000003387 modified "2023-09-27" @default.
- W2000003387 title "Electrostatic charge interactions in ordered powder mixes" @default.
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- W2000003387 doi "https://doi.org/10.1111/j.2042-7158.1982.tb04188.x" @default.
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