A Study on the Thermodynamic Properties of Interaction between Polyelectrolyte and Ionic Surfactants
Date Issued
2009
Date
2009
Author(s)
Wang, Chieh-Hsiang
Abstract
In the first part of this study, we examine the concentration regimes of poly(acrylic acid) solution by capillary viscometer. Through the capillary viscometer, we find that under specific concentration (0.05 wt%), the solution will be in the semidilute-unentangled regime as the PAA Mw equals to 4500000 or 2500000 while it will be the dilute regime as the PAA Mw equals to 5000 or 1800.n the second part, the interaction between anionic polyelectrolyte, poly(acrylic acid) and anionic surfactant, sodium dodecyl sulfate has been investigated by isothermal titration calorimetry measurements. Poly(acrylic acid) chain becomes more hydrophobic by adding sodium dodecyl sulfate into poly(acrylic acid) solution. Then sodium dodecyl sulfate can form micelles on poly(acrylic acid) chain due to hydrophobic effect.n the third part, the interaction between anionic polyelectrolyte, poly(acrylic acid) and cationic surfactant, alkyltrimethylammonium bromide (CnTAB, n = 12、16) has been investigated by isothermal titration calorimetry measurements. the hydrophobic property of surfactant increases with the chain length of surfactant, so hexadecyltrimethylammonium bromide is more easy to form mixing-micelles with poly(acrylic acid) chain.
Subjects
polyelectrolyte
polyacrylic acid
surfactant
mixed micelle
Type
thesis
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