ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION
<p>Three polymer-surfactant systems comprised of branched polyethylene imine (PEI) with an anionic surfactant (sodium dodecylsulfate; SDS), a cationic surfactant (tetradecyltrimethylammonium bromide; TTAB), and a zwitterionic surfactant (<italic>N</italic>-tetradecyl-<italic>...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2015-07-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000600787&lng=en&tlng=en |
| _version_ | 1819090820181000192 |
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| author | Ismael C. Bellettini Renato Eising Arlindo C. Felippe Josiel B. Domingos Edson Minatti Vanderlei G. Machado |
| author_facet | Ismael C. Bellettini Renato Eising Arlindo C. Felippe Josiel B. Domingos Edson Minatti Vanderlei G. Machado |
| author_sort | Ismael C. Bellettini |
| collection | DOAJ |
| description | <p>Three polymer-surfactant systems comprised of branched polyethylene imine (PEI) with an anionic surfactant (sodium dodecylsulfate; SDS), a cationic surfactant (tetradecyltrimethylammonium bromide; TTAB), and a zwitterionic surfactant (<italic>N</italic>-tetradecyl-<italic>N</italic>,<italic>N</italic>-dimethyl-3-ammonio-1-propanesulfonate; SB3-14) were studied based on the properties of surface tension, pyrene fluorescence emission, dynamic light scattering, pH, and zeta potential measurements. The critical aggregation concentration (<italic>cac</italic>) and polymer saturation point (<italic>psp</italic>) were determined for all three systems. The effect of these surfactants on the physico-chemical characteristics (diameter and surface charge) of the complexes formed was determined. Polymer-surfactant interactions occurred in all of the systems studied, with the strongest interactions, electrostatic in nature, occurring in the SDS-PEI system. After the neutralization of the polymer charges with the addition of the surfactant, the hydrophobic effect started to control the interlacing of the polymer chains. For the PEI-TTAB system, a very dense film was formed at surfactant concentrations above 2.0 mmol L<sup>-1</sup>. In this case, the bromide counter-ion interacted with both the positively-charged PEI and the head of the surfactant, which is responsible for the formation of double layer coordination complexes. For the system composed of PEI and the zwitterionic surfactant, less cooperative associations occurred in comparison with the other systems.</p> |
| first_indexed | 2024-12-21T22:29:54Z |
| format | Article |
| id | doaj.art-fb543400ff9b4258a453558511a1c35f |
| institution | Directory Open Access Journal |
| issn | 1678-7064 |
| language | English |
| last_indexed | 2024-12-21T22:29:54Z |
| publishDate | 2015-07-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-fb543400ff9b4258a453558511a1c35f2022-12-21T18:48:07ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642015-07-0138678779310.5935/0100-4042.20150085S0100-40422015000600787ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTIONIsmael C. BellettiniRenato EisingArlindo C. FelippeJosiel B. DomingosEdson MinattiVanderlei G. Machado<p>Three polymer-surfactant systems comprised of branched polyethylene imine (PEI) with an anionic surfactant (sodium dodecylsulfate; SDS), a cationic surfactant (tetradecyltrimethylammonium bromide; TTAB), and a zwitterionic surfactant (<italic>N</italic>-tetradecyl-<italic>N</italic>,<italic>N</italic>-dimethyl-3-ammonio-1-propanesulfonate; SB3-14) were studied based on the properties of surface tension, pyrene fluorescence emission, dynamic light scattering, pH, and zeta potential measurements. The critical aggregation concentration (<italic>cac</italic>) and polymer saturation point (<italic>psp</italic>) were determined for all three systems. The effect of these surfactants on the physico-chemical characteristics (diameter and surface charge) of the complexes formed was determined. Polymer-surfactant interactions occurred in all of the systems studied, with the strongest interactions, electrostatic in nature, occurring in the SDS-PEI system. After the neutralization of the polymer charges with the addition of the surfactant, the hydrophobic effect started to control the interlacing of the polymer chains. For the PEI-TTAB system, a very dense film was formed at surfactant concentrations above 2.0 mmol L<sup>-1</sup>. In this case, the bromide counter-ion interacted with both the positively-charged PEI and the head of the surfactant, which is responsible for the formation of double layer coordination complexes. For the system composed of PEI and the zwitterionic surfactant, less cooperative associations occurred in comparison with the other systems.</p>http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000600787&lng=en&tlng=enpolymer-surfactant interactionspyrene fluorescencepolyelectrolytes |
| spellingShingle | Ismael C. Bellettini Renato Eising Arlindo C. Felippe Josiel B. Domingos Edson Minatti Vanderlei G. Machado ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION Química Nova polymer-surfactant interactions pyrene fluorescence polyelectrolytes |
| title | ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION |
| title_full | ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION |
| title_fullStr | ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION |
| title_full_unstemmed | ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION |
| title_short | ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION |
| title_sort | association of branched polyethylene imine with surfactants in aqueous solution |
| topic | polymer-surfactant interactions pyrene fluorescence polyelectrolytes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000600787&lng=en&tlng=en |
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