On the vibration assisted fluidisation of silica nanoparticles
by Andrew T. Harris
International Journal of Nanotechnology (IJNT), Vol. 5, No. 2/3, 2008

Abstract: An experimental study was undertaken to investigate the process of vibration-assisted nanoparticle fluidisation. Fluidisation characteristics were assessed by measuring pressure drop, bed expansion and bed collapse behaviour at vibrational intensities between 0 Hz and 34 Hz, for silica nanoparticles with particle densities between 25 kg/m³ and 38 kg/m³, and particle sizes of 7 nm and 16 nm. Two modes of nanoparticle fluidisation behaviour were observed: i. agglomerate particulate fluidisation (APF), which is smooth, occurs with extremely high bed expansion, and practically no observable bubbles; ii. agglomerate bubbling fluidisation (ABF) which results in limited bed expansion with large bubbles rising quickly through the bed. The transition between particulate and bubbling modes occurred at different vibrational intensities for each type of particle, however in all cases, smooth agglomerate particulate fluidisation was observed at vibrational frequencies greater than 16.7 Hz. This is much lower than in previous studies of assisted nanoparticle fluidisation, and suggests that vibration assisted fluidisation is a viable technology for the large scale processing (e.g., reacting, dispersing, or coating) of nanomaterials.

Online publication date: Wed, 30-Jan-2008

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nanotechnology (IJNT):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com