Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/5075
DC Field | Value | Language |
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dc.contributor.author | Valente, Artur J. M. | - |
dc.contributor.author | Sobral, Abílio J. F. N. | - |
dc.contributor.author | Jiménez, Alfonso | - |
dc.contributor.author | Patachia, Sílvia | - |
dc.contributor.author | Oliveira, Ana R. C. B. | - |
dc.contributor.author | Lobo, Victor M. M. | - |
dc.date.accessioned | 2008-09-01T15:03:31Z | - |
dc.date.available | 2008-09-01T15:03:31Z | - |
dc.date.issued | 2006 | en_US |
dc.identifier.citation | European Polymer Journal. 42:9 (2006) 2059-2068 | en_US |
dc.identifier.uri | https://hdl.handle.net/10316/5075 | - |
dc.description.abstract | Calix[4]pyrrole (1) was synthesized and characterized and this macrocycle was incorporated in polyacrylamide gels. The presence of meso-octamethyl-porphyrinogen inside of gel was checked using infrared spectroscopy, differential scanning calorimetry, and swelling studies. The swelling degree of these hydrogels in equilibrium with different electrolytes (NaCl, LiCl, KCl, CaCl2 and AlCl3) was measured in a concentration range 0.1-0.5 mol dm-3. Although no significant alterations in the swelling degree can be found for the different 1:1 electrolytes, when the cation charge of unsymmetrical electrolytes increases, the gel swells in a significant way. This swelling process is enhanced by the presence of calyx[4]pyrrole. The effect of alkaline hydrolysis of polaycrylamide-based hydrogels was also studied. The hydrolysed hydrogels collapse in the presence of the electrolytes; this behavior is dependent on the hydrolysis degree, electrolyte charge and calyx[4]pyrrole presence and concentration; the latter leads to polyacrylamide with tailor-made properties. | en_US |
dc.description.uri | http://www.sciencedirect.com/science/article/B6TWW-4K0FJT9-2/1/a2e10fed9f08e8248532610bc3e2bdcd | en_US |
dc.format.mimetype | aplication/PDF | en |
dc.language.iso | eng | eng |
dc.rights | openAccess | eng |
dc.subject | Hydrogels | en_US |
dc.subject | Polyacrylamide | en_US |
dc.subject | Calyx[4]pyrrole | en_US |
dc.subject | Swelling degree | en_US |
dc.subject | Hydrolysis | en_US |
dc.title | Effect of different electrolytes on the swelling properties of calyx[4]pyrrole-containing polyacrylamide membranes | en_US |
dc.type | article | en_US |
dc.identifier.doi | 10.1016/j.eurpolymj.2006.04.002 | - |
uc.controloAutoridade | Sim | - |
item.fulltext | Com Texto completo | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.author.dept | Faculty of Sciences and Technology | - |
crisitem.author.parentdept | University of Coimbra | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0002-4612-7686 | - |
crisitem.author.orcid | 0000-0001-6367-027X | - |
crisitem.author.orcid | 0000-0002-5318-3280 | - |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
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filecda87134294c487faee87340b880d1cd.pdf | 257.47 kB | Adobe PDF | View/Open |
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