Powder processing operations such as blending or pneumatic
transport
can potentially induce triboelectric charging with subsequent agglomeration.
Traditionally the charging behavior is investigated using a Faraday
cage. In this paper, an alternative nonintrusive probe connected to
a voltmeter for comparative triboelectric charging studies of sieved
pharmaceutically relevant materials such as α-lactose monohydrate
(ALM) and adipic acid (AA) on acetal surfaces under controlled environmental
conditions was explored. The probe was verified using standard voltages
with determination in the positioning limits for effective measurements
between probe and surface. Results obtained with the probe were found
to be in good agreement with the Faraday cage method. A greater incidence
of particle-to-wall adhesions in smaller sized AA particles led to
a reduction in initial surface specific potential while the higher
quantity of fines in the ALM larger sieve fractions could be the major
contributing factor in the reduced surface specific potential.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.