For mixed surfactant films in water-in-oil microemulsions, insight into the interfacial structures and compositions has been obtained by combining data from pulsed field gradient NMR (PFG-NMR) and small-angle neutron scattering (SANS). As an example of this approach we report a preliminary study on water in n-heptane microemulsions stabilised by mixtures of didodecyldimethylammonium bromide and pentaethylene glycol monododecyl ether. The results deduced from both methods are consistent with spherical microemulsion droplets stabilised by a mixed surfactant film. It is shown that the combination of SANS and PFG-NMR is extremely powerful for investigating these multi-component systems. In particular, dynamic studies by PFG-NMR are useful for validating models for SANS data.

Studies of cationic and nonionic surfactant mixed microemulsions by small-angle neutron scattering and pulsed field gradient NMR / Giustini, Mauro; Palazzo, G.; Ceglie, A.; Eastoe, J.; Bumujdad, A.; Heenan, R. K.. - STAMPA. - 115:(2000), pp. 25-30. [10.1007/3-540-46545-6_6]

Studies of cationic and nonionic surfactant mixed microemulsions by small-angle neutron scattering and pulsed field gradient NMR

GIUSTINI, Mauro;
2000

Abstract

For mixed surfactant films in water-in-oil microemulsions, insight into the interfacial structures and compositions has been obtained by combining data from pulsed field gradient NMR (PFG-NMR) and small-angle neutron scattering (SANS). As an example of this approach we report a preliminary study on water in n-heptane microemulsions stabilised by mixtures of didodecyldimethylammonium bromide and pentaethylene glycol monododecyl ether. The results deduced from both methods are consistent with spherical microemulsion droplets stabilised by a mixed surfactant film. It is shown that the combination of SANS and PFG-NMR is extremely powerful for investigating these multi-component systems. In particular, dynamic studies by PFG-NMR are useful for validating models for SANS data.
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/107029
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 5
social impact