PVP superabsorbent nanogels

dc.creatorBUENO, Vania B.
dc.creatorCuccovia, Iolanda Midea
dc.creatorGuralnik, Hernan Chaimovich
dc.creatorCATALANI, Luiz H.
dc.date.accessioned2012-10-20T05:23:17Z
dc.date.accessioned2018-07-04T15:49:10Z
dc.date.available2012-10-20T05:23:17Z
dc.date.available2018-07-04T15:49:10Z
dc.date.created2012-10-20T05:23:17Z
dc.date.issued2009
dc.identifierCOLLOID AND POLYMER SCIENCE, v.287, n.6, p.705-713, 2009
dc.identifier0303-402X
dc.identifierhttp://producao.usp.br/handle/BDPI/31189
dc.identifier10.1007/s00396-009-2017-0
dc.identifierhttp://dx.doi.org/10.1007/s00396-009-2017-0
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1627827
dc.description.abstractMonomer free hydrogel nanoparticles (nanogels) were prepared by crosslinking preformed poly(N-vinyl-2-pyrrolidone) (PVP) entrapped in the aqueous pool of hexadecyltrimethylammonium bromide reverse micelles using the Fenton reaction. The PVP nanoparticles were spherical with a dry diameter of 27 nm. The diameter of the swollen particles was ten times higher, i.e., a swelling ratio, Q, above 900, characterizing this preparation as superabsorbent. PVP nanogel swelling was dependent on bound Fe(3+) and varied with pH and ionic strength. Nanogel deswelling by salt followed the anions lyotropic series, i.e., SCN(-) < HSO(3)(-) < NO(3)(-) < I(-) < Cl(-) < CH(3)COO(-) < CF(3)SO(3)(-). The value of Q reached 6,000 in iron-free PVP nanoparticles at low pH, making this nanogel one of the most efficient swelling systems so far described.
dc.languageeng
dc.publisherSPRINGER
dc.relationColloid and Polymer Science
dc.rightsCopyright SPRINGER
dc.rightsrestrictedAccess
dc.subjectSuperabsorbent nanogel
dc.subjectReversed micelles
dc.subjectPVP hydrogel
dc.subjectFenton reaction
dc.titlePVP superabsorbent nanogels
dc.typeArtículos de revistas


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