Journal
JOURNAL OF AEROSOL SCIENCE
Volume 39, Issue 11, Pages 987-1002Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jaerosci.2008.07.003
Keywords
Electrospray; Microparticles; Electrostatics; Current; Morphology; Droplet; Particle size
Categories
Funding
- Agency of Science, Technology and Research (A*STAR)
- National University of Singapore (NUS) [R279-000-208-305]
Ask authors/readers for more resources
Polymeric particles were fabricated using the electrohydrodynamic atomization (EHDA) process in a modified electrospray system where nozzle and ring are enclosed in a shuttle chamber. Two organic liquids (PLGA+DCM (w/v = 7%), PLGA+ACN (w/v = 8%)) were tested. The spray Current (I) scaling laws with liquid flow rate (Q) were found to be I similar to Q(1/4) and the droplet size (d(d)) scaling laws d(d) similar to Q(1/2), which agrees with the work [Ganan-Calvo, A. M., Davila, J., & Barrero, A. (1997). Current and droplet size in the electrospraying of liquids. Scaling laws. Journal of Aerosol Science, 28, 249-275] conducted using a regular electrospray system. The size of the fabricated particles decreased with decreasing nozzle-plate distance as well as with increasing conductivity of polymer solution or with decreasing liquid flow rate. The morphology of the fabricated particles became less spherical with increasing Peclet number (Pe). The variation of Pe values due to either using a different polymer or a different ambient temperature resulted in comparable changes in particle morphology. An Okuyama Peclet number analogy has been shown to be promising for characterizing the formation of particle morphology under the use of different solvents. (C) 2008 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available