Complexing capsules--metal extraction and modeling of ion transfer.
Polyamide complexing capsules containing a poly(acrylic acid) gel are synthesized by a two steps polymerization process with various diameters (10 microm for microcaps or 200 microm for mcaps). A cationic exchange between gel carboxylic functions and metal ions is realized. Extraction and stripping measurements show that the composition of the capsule membrane doesn't hinder the mass transfer. A model, taking account only of the diffusion in the gel phase, is studied.
Frère
Y
Y
Institut Charles Sadron, 6, rue Boussingault, 67083 Cedex, Strasbourg, France. frere@ics.u-strabg.fr
Danicher
L
L
Laguécir
A
A
Loureiro
J M
JM
Burgard
M
M
D000180:Acrylic Resins / Q000737:chemistry; D000465:Algorithms; D004339:Drug Compounding / Q000379:methods*; D005079:Excipients; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D009757:Nylons / Q000737:chemistry; D010316:Particle Size
D000180:Acrylic Resins; D005079:Excipients; D008670:Metals; D009757:Nylons; C006903:carbopol 940