Binding of sodium dodecyl sulfate to linear and star homopolymers of the nonionic poly(methoxyhexa(ethylene glycol) methacrylate) and the polycation poly(2-(dimethylamino)ethyl methacrylate): electromotive force, isothermal titration calorimetry, surface tension, and small-angle neutron scattering measurements

Langmuir : the ACS Journal of Surfaces and Colloids
S Couderc-AzouaniE Wyn-Jones

Abstract

We investigated the binding of sodium dodecyl sulfate (SDS) to various linear and star polymers of the nonionic methoxyhexa(ethylene glycol) methacrylate (PMHEGMA) and the ionic 2-(dimethylamino)ethyl methacrylate (PDMAEMA), the latter being a polycation at low pH. The dodecyl sulfate ion selective electrode (EMF), isothermal titration calorimetry (ITC), and surface tension (ST) were applied to gain detailed information about interactions. In all cases there is evidence of significant binding of SDS over an extensive SDS concentration range spanning from ca. 10(-6) to 0.1 mol dm(-3). At pH 3, the polymer PDMAEMA is a strong polycation and here the binding is dominated by electrostatic 1:1 charge neutralization with the anionic surfactant. At their natural pH of 8.6, PMHEGMA and PDMAEMA polymers are essentially nonionic and bind SDS in the form of polymer-bound aggregates in the concentration range of ca. 1 x 10(-3) to 3 x 10(-2) mol dm(-3). All the polymers also bind SDS to a lesser extent at concentrations below 1 x 10(-3) mol dm(-3) reaching as low as 10(-7) mol dm(-3). This low concentration binding process involves the polymer and nonassociated SDS monomers. As far as we are aware, this is the first example that such a low ...Continue Reading

References

Jan 15, 1997·Journal of Colloid and Interface Science·J PenfoldP Cummins
Jan 1, 1947·The Journal of Physical and Colloid Chemistry·P DEBYE

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Citations

Oct 13, 2005·Journal of Molecular Recognition : JMR·Abdessamad Ababou, John E Ladbury
Jan 17, 2015·Journal of Colloid and Interface Science·Trishna SaigalRobert D Tilton
Sep 29, 2011·Journal of Colloid and Interface Science·Cathy E McNameePer M Claesson
Feb 20, 2010·Advances in Colloid and Interface Science·C D BainR von Klitzing
Oct 16, 2015·Biochimica Et Biophysica Acta·Watson LohKam Chiu Tam
Oct 18, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Mauro MoglianettiSimon Titmuss
May 18, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Robin D WesleyNorman C Billingham
Feb 8, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Hao WangRobert K Thomas

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