Improving Aerosol Dispersion through Processing and DisseminationTechniques

KONA Powder and Particle Journal

Brij M. Moudgil¹  Stephen T. Tedeschi¹  Hassan El-Shall¹  Nathanael I. Stevens²  Kevin Powers²  Arun Ranade³ 

[1] Department of Materials Science andEngineering, University of Florida;Particle Engineering Research Center,University of Florida;Particle Technology, LLC, University ofFlorida;

关键词: particle;    aerosol;    dispersion;    dissemination;    statistical design;    nanoparticle;   

DOI  :  10.14356/kona.2009020

来源: DOAJ

【 摘 要 】

The state of dispersion is a vital aspect of powder technology impacting bothtraditional and emerging technologies in many diverse areas of interestincluding health care, industry, the environment, and the military. In suchapplications, the properties and quality of the resultant product will bedirectly and noticeably affected by the degree to which the particles aredispersed. In any operation where satisfactory particle dispersion isimperative, a reduction in dispersion, or increased agglomeration, leads to poorefficiency and ultimately results in lower yields and increased cost. As powdertechnology moves into the nano-age, the challenges of maintaining and improvingparticle dispersion become increasingly important. Decreasing particle size intothe submicron range can significantly increases the effect of surface forcesleading to an increase in the cohesive forces of the powder, thus, making anunderstanding of dispersion even more essential.In order to develop the knowledge base to understand and control aerosoldispersion, a fundamental study into significant powder characteristics andenvironmental conditions that influence dispersion has been conducted. Thispaper discusses the results of testing various techniques employed to improvethe dispersion of sub-micron aluminum flakes such as using a fumed silica spacerto reduce interparticle contact area and, in turn, attractive van der Waalsforces, as well as examining the effect of dissemination pressure on the stateof dispersion of the particles. This research was conducted using statisticalexperimental design in order to efficiently study significant factors.

【 授权许可】

Unknown