home

Research Activities top

The Laboratory of Colloid Chemistry carries out research activities on polymer-surfactant systems, fluorescently labeled polymers, micellization and solubilization phenomena, microemulsions, micellar catalysis, surfactant partition between non-miscible phases, liquid membranes and micro and nanometric scale dispersions.
At the same time, the laboratory has experience in applied research on enhanced oil recovery, pesticide formulation, superplastifiers for cement and concrete, road-packer and anti-frost products, as well as in developing original methods of analysis for surfactants, pesticides and drugs.


Research Team top

Dan Florin ANGHEL - head of laboratory

Marieta BALCAN - senior researcher II
Sandu PERETZ - senior researcher III
Adriana BARAN - senior researcher III
Alina Aurelia IOVESCU - researcher
Gabriela STINGA - researcher
Doina Mariana MIHAI - Ph.D. student
Cornelia STOIAN - Ph.D. student

International Projects and Scientific Collaborations top

International Projects and Scientific Collaborations top The laboratory collaborates with Stransky-Laboratorium für Physikalische und Theoretische Chemie, Fakultät II, Institut für Chemie, Technische Universität Berlin, Germany; Max-Planck-Institut für Kolloids und Grenzflachen, Golm, Germany and Carl Albrechts Universität, Kiel, Germany.
The project is entitled: "Mesoscopically Organized Composites" and is financially supported by DFG. The German partner is Dr. Regine von Klitzing.
The collaboration started in 1999 and is continuing at present. The output of the common research work is listed below:

1) "Steady-state fluorescence investigation of pyrene-labeled poly(acrilic acid)s in aqueous solution and in the presence of sodium dodecyl sulfate"
D.F. Anghel, J.L. Toca-Herera, F.M. Winnik, W. Rettig and R. v. Klitzing
Langmuir, 18(2002)5600-5606.
2) "Investigation of micellar properties of the cationic surfactants with the aid of PVC-membrane dodecyltrimethylammonium electrode"
D.M. Mihai, R. v. Klitzing, D.F. Anghel
Annals of West University of Timisoara, Series Chemistry 12(2003)935-942.
3) "Influence of electrostatics and hydrophilic/hydrophobic balance on the growth of polyelectrolyte multilayers"
D.F. Anghel, R. Steitz, J.E. Wong, S. Garnier, A. Laschewski, R. v. Klitzing
paper presented at the 20th General Conference of the Condensed Mater Division of the European Physical Society (CMD20), Prague, Czech Republic, 19-23 July, 2004.
4) "Effects induced by the charge density of polyelectrolytes on multilayers formation"
D.F. Anghel, R. Steitz, J.E. Wong, S. Garnier, A. Laschewski, W. Jaeger, A. Heiling, R. v. Klitzing
paper presended at Oswald Kolloquium, Berlin, Germany, 23-24 Nov., 2004.
5) "Effect of spatial confinement on polyelectrolyte conformation", D.H. Rapoport
D.F. Anghel, H. Möhwald, R. v. Klitzing"
paper presended at Oswald Kolloquium, Berlin, Germany, 23-24 Nov., 2004.
6) "Interaction of dodecylpyridinium chloride with sodium dextran sulfate in the absence and presence of sodium chloride"
D.F. Anghel, D.M. Mihai, G. Stinga, A. Iovescu, A. Baran, R. v. Klitzing
paper that will be presented at the VIIIth Conference on Colloid and Surface Chemistry, Galatzi, Romania, 3-5 June, 2005.

Publications top

1) "Polymeric acid and nonionic surfactant mixtures", D.F. Anghel and S. Saito, Recent Res. Devel. Surface Colloids, 1(2004)301-322.
2) "An electrochemical model for interpreting the counterion effect of cationic surfactants in interaction with charged polymers. I. Adsorption isotherm and counterion effect upon the adsorption process", N. Bonciocat, D.F. Anghel, S. Saito, A. Iovescu and A. Baran, Rev. Roumaine Chim., 48(2003)425-431.
3) "An electrochemical model for interpreting the counterion effect of cationic surfactants in interaction with charged polymers. II. Method of determining the adsorption free energies of cationic surfactants counterions", N. Bonciocat, D.F. Anghel, S. Saito, A. Iovescu and A. Baran Rev. Roumaine Chim., 48(2003)521-526.
4) "Counterion Effect of Cationic Surfactants on the Interaction with Poly(Acrylic Acid)", D.F. Anghel, S. Saito, A. Iovescu, A. Baran, G. Stînga, and C. Neamtu, Progr. Colloid Polym. Sci. 122(2003)16-26.
5) "Thermodynamic properties of polyethoxylated nonylphenols by reversed-phase high-performance liquid chromatography", M. Balcan and D.F. Anghel, Colloids Surf. A: Physicochem. Eng. Aspects, 221(2003)1-8.
6) "Phase behavior of water/oil/nonionic surfactants with normal distribution of the poly(ethylene oxide) (PEO) chain length", M. Balcan, D.F. Anghel and V. Raicu, Colloid Polym. Sci., 281(2003)143-149.
7) "Determination of thermodynamic parameters of ethoxylated nonionic surfactants by means of reversed-phase high-performance liquid chromatography", M.Balcan, D.F. Anghel, A. Voicu and D.C. Balcan, Colloids Surf. A: Physicochem. Eng. Aspects, 204(2002)141-151.
8) "Basic hydrolysis of p-nitrophenyl esters in presence of tetradecyltrimethylammonium bromide", G. Stînga, D.F. Anghel and A. Voicu, Rev. Chim. (Bucharest), 52(2001)758-761.
9) "Association of naphthalene-labeled poly(acrylic acid) and interaction with cationic surfactants studied using fluorescence", K. Schillén, D.F. Anghel, M. Graça Miguel and B. Lindman, Langmuir, 16(2000)10508-10539.
10) "Ternary phase diagram of Triton X-100/water/poly(acrylic acid) system" A.N. Galatanu, I.S. Chronakis, D.F. Anghel, and A. Khan, Langmuir, 16(2000)4922-4928.
top