Biodegradable hollow poly-lactic acid (PLA) microcapsules and hollow polyelectrolyte microcapsules made of poly-allylamine hydrochloride (PAH) were synthesized by directly adsorbing these polymers to N2 (air) and CO2 microbubbles respectively, using the bubble template method. To manufacture PLA microcapsules, droplets of a solution of PLA in methylene chloride (CH2Cl2) were emulsified in water. Then by solvent diffusion, N2 microbubbles nucleated inside the droplets and PLA adsorbed to the bubble surface to form microcapsules. Likewise, for PAH microcapsules, when an aqueous solution of Na2CO3 including PAH is titrated with HCl, within a specific range 7.5 < pH < 9.0, colloidal PAH particles are formed and then adsorbs to the nucleated CO2 microbubbles. This yields to hollow PAH microcapsules. If the solution pH is outside this range, colloidal particles can no longer exist, thus no microcapsules can be synthesized. This document mainly focuses on size control of these two types of microcapsules.
Skip Nav Destination
ASME/JSME 2011 8th Thermal Engineering Joint Conference
March 13–17, 2011
Honolulu, Hawaii, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-3892-1
PROCEEDINGS PAPER
Size Control of Hollow Polylactic Acid Microcapsules and Hollow Polyelectrolyte Microcapsules in Bubble Template Method Available to Purchase
Jay J. Molino,
Jay J. Molino
The University of Tokyo, Kashiwa, Chiba, Japan
Search for other works by this author on:
Hirofumi Daiguji,
Hirofumi Daiguji
The University of Tokyo, Kashiwa, Chiba, Japan
Search for other works by this author on:
Fumio Takemura
Fumio Takemura
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
Search for other works by this author on:
Jay J. Molino
The University of Tokyo, Kashiwa, Chiba, Japan
Hirofumi Daiguji
The University of Tokyo, Kashiwa, Chiba, Japan
Fumio Takemura
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
Paper No:
AJTEC2011-44556, T30097; 6 pages
Published Online:
March 1, 2011
Citation
Molino, JJ, Daiguji, H, & Takemura, F. "Size Control of Hollow Polylactic Acid Microcapsules and Hollow Polyelectrolyte Microcapsules in Bubble Template Method." Proceedings of the ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASME/JSME 2011 8th Thermal Engineering Joint Conference. Honolulu, Hawaii, USA. March 13–17, 2011. T30097. ASME. https://doi.org/10.1115/AJTEC2011-44556
Download citation file:
6
Views
Related Proceedings Papers
Related Articles
Effect of Laser-Induced Crystallinity Modification on Biodegradation Profile of Poly(L-Lactic Acid)
J. Manuf. Sci. Eng (February,2014)
Photographic Study on Bubble Motion in Subcooled Pool Boiling
J. Eng. Gas Turbines Power (October,2010)
Lumped Parameter Analysis of an Enclosed Incompressible Squeeze Film and a Central Gas Bubble
J. Fluids Eng (February,2008)
Related Chapters
Biodegradable Hydraulic Fluids
Hydraulic Fluids: A Guide to Selection, Test Methods and Use
Fluid-Solid Coupling Model of Contaminant Transport Considering Landfill Biodegradation and Simulation
Geological Engineering: Proceedings of the 1 st International Conference (ICGE 2007)
“iEnergy-from-Waste”: Evolution or Revolution in Automation for Municipal Waste Treatment Facilities?
Proceedings of 2018 EEC/WTERT Conference