W/O microemulsions as model systems for the study of water confined in microenvironments: Low resolution 1H magnetic resonance relaxation analysis

  • D. Senatra
  • L. Lendinara
  • M. G. Giri
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 84)


The properties of water confined in environments of low dimensionality were investigated by means of 1H magnetic resonance relaxation (NMRR) analysis. As “water-container”, a water-in-oil microemulsion, (n-hexadecane (O), K-oletae (S), n-hexanol (CoS), water (W)), was chosen because, differential scanning calorimetry (DSC) measurements showed that in this system several forms of water coexist, distinguished by the melting temperatures of 273 K “free water”, 263 K “interphasal water”, and 233 K “bound water”. — Two pairs of microemulsion systems were studied as a function of increasing water concentration (C, mass fraction), namely: (W/O, D2O/O) and (W/(deuterated oil)), (D2O/deuterated oil)). — The 1H spin-lattice and spin-spin relaxation curves were obtained at 20 MHz and 310 K. — A comparison between the trends of all best fit parameters, evaluated by two-and three-exponential analyses, was performed for both pairs of microemulsion systems.

Key words

Water/oil (W/O) microemulsion NMRR study water in microenvironments free water spin-lattice (longitudinal) relaxation spin-spin (transverse) relaxation 


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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1991

Authors and Affiliations

  • D. Senatra
    • 1
    • 2
  • L. Lendinara
    • 3
  • M. G. Giri
    • 1
    • 2
  1. 1.Department of PhysicsUniversity of FlorenceFlorenceItaly
  2. 2.INFM GroupItaly
  3. 3.Department of PhysicsUniversity of BolognaBolognaItaly

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