Maro Publications

Electrojetting

Patents with Abstracts

*6/7/2012

Maro Topics

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Patents with Abstracts

8,187,708 
Microphasic micro-components and methods for controlling morphology via electrified jetting
 
Lahann and Kazemi of the University of Michigan, Michigan, prepared  multiphasic micro-components, such as core-shell or anisotropic (e.g., Janus) multiphasic particles with well-defined structures using electrohydrodynamic co-jetting of two polymer solutions containing polyelectrolytes. Suitable polyelectrolytes include polyacrylic acid (PAA), poly(acrylamide acrylic acid (PAAm), and/or poly(acryl amide-co-acrylic acid) (PAAm-AA), sodium polystyrene sulfonate (PSS), polyethylene imine (PEI), polypeptides, copolymers and combinations of these. Control of certain variables, such as relative conductivities of the two jetting solutions, controls the particle morphologies formed, leading to a predetermined phase orientation for the same polymer system. In certain aspects, after cross-linking, core-shell particles are stable in aqueous solutions and exhibit reproducible swelling behavior, while maintaining the original core-shell geometry. In addition, micro-components formed in accordance with the present teachings are pH-responsive based on external environmental pH. Thus, such micro-components are useful for a variety of different applications, including micro- and nano-active ingredient delivery systems.  (RDC 6/7/2012)

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

***********************************

Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
**************************************

** Date of latest addition; date of first entry is 6/7/2012.