Behaviour of Polynuclear Aryl Sulfonates
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Singh,A.K
Negi,M.S Anand,O.N |
|
| Date |
2009-07-28T05:37:04Z
2009-07-28T05:37:04Z 2009-07-28T05:37:04Z |
|
| Identifier |
13TH LAWPSP SYMPOSIUM Feb,2003
http://hdl.handle.net/123456789/401 |
|
| Description |
A Series of Hexadecyl poly-nuclear 13romatic,Decalin and Tetralin sulfonates have been
synthesized. The CMC, surface & interfacial tension values at various concentrations above and
below CMC both in the aqueous and non-aqueous medium have been determined. The micellar
size, shape, average number of monomers constituting the micelles and thermodynamic properties
have also been estimated. These studies show .that value both in aqueous as well as
Heptane medium decrease with increase in number of arorra . gs in the sulfonates. The size
and shape of these micelles do not change appreciably in Hep e though the ,number of monomers
constituting the micelles change with change of structure of aromatic moiety. The thermodynamic
parameters do not seem to affect the surface active and solubilizing properties even though
the free energy, enthalpy and entropy decrease with the increase in size of aromatic moiety. The
surface and interfacial tension values are the lowest with aqueous and non-aqueous solution of
Hexadecyl Naphthalene sulfonate but these values increase witl1increase in number of aromatic
ring In the sulfonates. The size of the micelles of Hexadecyl Naphthalene sulfonates in aqueous
soll!tions and the number of monomer molecules constituting the micelles is relatively bigger than
other aromatic sulfonates. Although the size of micelles of Hexadecyl Benzanthracene sulfonate
and Hexadecyl Pentacene sUlfonate are comparable yet the number of molecules constituting
these micelles are the least. The solubilization of alkanes in the aqueous solution of Sodium Naphthalene
sulfonate containing electrolyte and iso-butanol is highest but it falls off rapidly with all other
sulfonates. This shows the extreme sensitivity of solubilization towards the structure of sulfonates.
The detergency increases with the increase in size of aromatic moiety in these sulfonates. The
structure thus has profound influence on the surface and micellar properties of the sulfonates.
The studies are important from the point of view of appliqation of synthetic sulfonates as
additives / surfactants in place of petroleum sulfonates.
KEY WORDS
Hexadecyl poly-nuclear sulfonates, aqueous & non-aqueous medium, surface tension and energy,
CMC, micelle, shape and size of micelle, thermodynamic parameter, solubilization, detergency,
viscosity.
|
|
| Language |
en_US
|
|
| Subject |
Hexadecyl poly-nuclear sulfonates
Viscosity |
|
| Title |
Behaviour of Polynuclear Aryl Sulfonates
|
|
| Type |
Article
|
|