Shear rheology of anionic and zwitterionic modified polyacrylamides

Mónica Rodríguez, Jorge Xue, Laura M. Gouveia, Alejandro J. Müller, Avelino E Saez, Julien Rigolini, Bruno Grassl

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Two groups of copolymers were synthesized from high molecular weight polyacrylamides. One group of copolymers consisted of sulfonated, anionic copolymers (PAM-S) of acrylamide with the sodium salt of 2-acryloamido-2-methyl-1-propane sulfonic acid, and the other consisted of zwitterionic copolymers (PAM-Z) of acrylamide with a sulfobetaine methacrylate monomer. The shear rheology of aqueous solutions of the copolymers and their mixtures was studied experimentally. Solutions of both copolymers exhibit shear thinning behavior in the range of concentrations explored. Solutions of mixtures of two copolymers (PAM-Z and PAM-S) exhibited a slight viscosity synergy at high relative contents of PAM-S. Addition of a relatively high concentration of an electrolyte (0.3. M NaCl) induces decreases in viscosity due to coil contraction and eliminates the synergy of the mixtures. Mixtures of the zwitterionic copolymer and a cationic surfactant, cetyl trimethylammonium p-toluene sulfonate (CTAT), were also studied. These solutions exhibit a strong synergistic effect at low-shear rates when the surfactant forms wormlike micelles. In addition, oscillatory shear measurements demonstrate that PAM-Z/CTAT mixtures are significantly more elastic than CTAT solutions, which indicates that PAM-Z is effective in promoting micelle entanglements, as reflected by the increase in relaxation time with PAM-Z content.

Original languageEnglish (US)
Pages (from-to)66-73
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume373
Issue number1-3
DOIs
StatePublished - Jan 3 2011

Fingerprint

pulse amplitude modulation
Pulse amplitude modulation
Polyacrylates
Rheology
rheology
copolymers
Copolymers
shear
sulfonates
Toluene
toluene
Acrylamide
Micelles
micelles
surfactants
Viscosity
viscosity
Propane
shear thinning
Sulfonic Acids

Keywords

  • Amphiphilic polymers
  • CTAT
  • Polyacrylamide
  • Wormlike micelles
  • Zwitterionic copolymers

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

Cite this

Shear rheology of anionic and zwitterionic modified polyacrylamides. / Rodríguez, Mónica; Xue, Jorge; Gouveia, Laura M.; Müller, Alejandro J.; Saez, Avelino E; Rigolini, Julien; Grassl, Bruno.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 373, No. 1-3, 03.01.2011, p. 66-73.

Research output: Contribution to journalArticle

Rodríguez, Mónica ; Xue, Jorge ; Gouveia, Laura M. ; Müller, Alejandro J. ; Saez, Avelino E ; Rigolini, Julien ; Grassl, Bruno. / Shear rheology of anionic and zwitterionic modified polyacrylamides. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2011 ; Vol. 373, No. 1-3. pp. 66-73.
@article{c7d4678121c14b9090a06e9c1ea7ca69,
title = "Shear rheology of anionic and zwitterionic modified polyacrylamides",
abstract = "Two groups of copolymers were synthesized from high molecular weight polyacrylamides. One group of copolymers consisted of sulfonated, anionic copolymers (PAM-S) of acrylamide with the sodium salt of 2-acryloamido-2-methyl-1-propane sulfonic acid, and the other consisted of zwitterionic copolymers (PAM-Z) of acrylamide with a sulfobetaine methacrylate monomer. The shear rheology of aqueous solutions of the copolymers and their mixtures was studied experimentally. Solutions of both copolymers exhibit shear thinning behavior in the range of concentrations explored. Solutions of mixtures of two copolymers (PAM-Z and PAM-S) exhibited a slight viscosity synergy at high relative contents of PAM-S. Addition of a relatively high concentration of an electrolyte (0.3. M NaCl) induces decreases in viscosity due to coil contraction and eliminates the synergy of the mixtures. Mixtures of the zwitterionic copolymer and a cationic surfactant, cetyl trimethylammonium p-toluene sulfonate (CTAT), were also studied. These solutions exhibit a strong synergistic effect at low-shear rates when the surfactant forms wormlike micelles. In addition, oscillatory shear measurements demonstrate that PAM-Z/CTAT mixtures are significantly more elastic than CTAT solutions, which indicates that PAM-Z is effective in promoting micelle entanglements, as reflected by the increase in relaxation time with PAM-Z content.",
keywords = "Amphiphilic polymers, CTAT, Polyacrylamide, Wormlike micelles, Zwitterionic copolymers",
author = "M{\'o}nica Rodr{\'i}guez and Jorge Xue and Gouveia, {Laura M.} and M{\"u}ller, {Alejandro J.} and Saez, {Avelino E} and Julien Rigolini and Bruno Grassl",
year = "2011",
month = "1",
day = "3",
doi = "10.1016/j.colsurfa.2010.10.024",
language = "English (US)",
volume = "373",
pages = "66--73",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Shear rheology of anionic and zwitterionic modified polyacrylamides

AU - Rodríguez, Mónica

AU - Xue, Jorge

AU - Gouveia, Laura M.

AU - Müller, Alejandro J.

AU - Saez, Avelino E

AU - Rigolini, Julien

AU - Grassl, Bruno

PY - 2011/1/3

Y1 - 2011/1/3

N2 - Two groups of copolymers were synthesized from high molecular weight polyacrylamides. One group of copolymers consisted of sulfonated, anionic copolymers (PAM-S) of acrylamide with the sodium salt of 2-acryloamido-2-methyl-1-propane sulfonic acid, and the other consisted of zwitterionic copolymers (PAM-Z) of acrylamide with a sulfobetaine methacrylate monomer. The shear rheology of aqueous solutions of the copolymers and their mixtures was studied experimentally. Solutions of both copolymers exhibit shear thinning behavior in the range of concentrations explored. Solutions of mixtures of two copolymers (PAM-Z and PAM-S) exhibited a slight viscosity synergy at high relative contents of PAM-S. Addition of a relatively high concentration of an electrolyte (0.3. M NaCl) induces decreases in viscosity due to coil contraction and eliminates the synergy of the mixtures. Mixtures of the zwitterionic copolymer and a cationic surfactant, cetyl trimethylammonium p-toluene sulfonate (CTAT), were also studied. These solutions exhibit a strong synergistic effect at low-shear rates when the surfactant forms wormlike micelles. In addition, oscillatory shear measurements demonstrate that PAM-Z/CTAT mixtures are significantly more elastic than CTAT solutions, which indicates that PAM-Z is effective in promoting micelle entanglements, as reflected by the increase in relaxation time with PAM-Z content.

AB - Two groups of copolymers were synthesized from high molecular weight polyacrylamides. One group of copolymers consisted of sulfonated, anionic copolymers (PAM-S) of acrylamide with the sodium salt of 2-acryloamido-2-methyl-1-propane sulfonic acid, and the other consisted of zwitterionic copolymers (PAM-Z) of acrylamide with a sulfobetaine methacrylate monomer. The shear rheology of aqueous solutions of the copolymers and their mixtures was studied experimentally. Solutions of both copolymers exhibit shear thinning behavior in the range of concentrations explored. Solutions of mixtures of two copolymers (PAM-Z and PAM-S) exhibited a slight viscosity synergy at high relative contents of PAM-S. Addition of a relatively high concentration of an electrolyte (0.3. M NaCl) induces decreases in viscosity due to coil contraction and eliminates the synergy of the mixtures. Mixtures of the zwitterionic copolymer and a cationic surfactant, cetyl trimethylammonium p-toluene sulfonate (CTAT), were also studied. These solutions exhibit a strong synergistic effect at low-shear rates when the surfactant forms wormlike micelles. In addition, oscillatory shear measurements demonstrate that PAM-Z/CTAT mixtures are significantly more elastic than CTAT solutions, which indicates that PAM-Z is effective in promoting micelle entanglements, as reflected by the increase in relaxation time with PAM-Z content.

KW - Amphiphilic polymers

KW - CTAT

KW - Polyacrylamide

KW - Wormlike micelles

KW - Zwitterionic copolymers

UR - http://www.scopus.com/inward/record.url?scp=78649955063&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649955063&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2010.10.024

DO - 10.1016/j.colsurfa.2010.10.024

M3 - Article

VL - 373

SP - 66

EP - 73

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 1-3

ER -