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Materiale Plastice (Mater. Plast.), Year 2015, Volume 52, Issue 1,





CLAUDIU-AUGUSTIN GHIORGHITA, FLORIN BUCATARIU, MARCELA MIHAI, ECATERINA STELA DRAGAN Polyelectrolyte Multilayers Composed of Chitosan and Poly(acrylic acid)II. Sorption/release of methylene blue


Abstract:
Chitosan (CHI) and poly(acrylic acid) (PAA) polyelectrolyte multilayers were constructed onto silica microparticles with particle diameter of 40 - 60 mm (Daisogel type). The multilayers were subject to two post-treatment strategies: (i) immersion in an aqueous solution with pH = 2.4 for 5 min, followed by immersion for 1 min in water and thermal treatment at 120oC for 60 min and (ii) cross-linking with glutaraldehyde for 60 min. The sorption properties for a cationic dye were investigated taking methylene blue (MB) as a model. The reusability of (CHI/PAA)n multilayers deposited onto Daisogel microparticles in the consecutive sorption/desorption cycles of MB was investigated as a function of the number of double layers and the post-treatment strategy. Keywords: polyelectrolyte multilayer; chitosan; poly(acrylic acid); methylene blue; silica



Issue: 2015 Volume 52, Issue 1
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Publication date: 2015/3/30
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