Effects of additives on the foaming properties of Aculyn 22 and Aculyn 33 polymeric solutions

A Bureiko,A Trybala,J Huang,N Kovalchuk,V Starov

doi:10.1016/j.colsurfa.2014.02.052

Abstract

Foam stability and foam drainage of aqueous solutions of Aculyn™ 22 and Aculyn™ 33 polymers are considered. Measurements of both bulk and surface rheology of A22 and A33 solutions in the presence of sodium chloride and iso-propanol are performed for the polymer concentrations 1–1.5%. Properties of mixtures of these polymers are investigated. Addition of iso-propanol does not change bulk properties of the A33 solutions but decreases their surface viscoelasticity. Addition of iso-propanol decreases bulk viscosity as well as the bulk and surface viscoelastic moduli of the A22 solutions and moves the region of pronouncing shear thinning behaviour to the smaller shear rates. The last effect depends on the salt concentration. Solutions of both polymers form foams, which are stable during several hours. Characteristic time of foam drainage increases with the polymer concentration and decreases with the salt concentration and iso-propanol content. The decrease in the surface viscoelastic modulus results in faster foam coarsening and lower foam stability.

Highlights

Polymer emulsions AculynTM 22 and AculynTM 33 are rheology modifiers i.e. aqueous solutions of these polymers are highly viscous, shear thinning non-Newtonian liquids
In the previous paper [24] we presented the results of experimental study of influence of bulk and surface rheology of solutions of commercially available polymers AculynTM 22 and AculynTM 33 on foam drainage
Concentration of the polymer, concentration of sodium chloride and addition of iso-propanol alcohol were selected as variable parameters to control properties of the AculynTM 22 (A22) and andTM 33 (A33) solutions

Summary

Introduction

Polymer emulsions AculynTM 22 and AculynTM 33 are rheology modifiers i.e. aqueous solutions of these polymers are highly viscous, shear thinning non-Newtonian liquids They are compatible with many non-ionic and anionic surfactants and show synergistic interaction with them [1,2]. Most of common polyelectrolytes [8] and non-ionic polymers like poly(vinyl pyrrolidone) (PVP) [9] and polyoxyethylene (POE) [10] are used for foam stabilization. Polymers, surfactants and their mixtures are widely used in home and personal care products but in many industrial applications (e.g. paper industry) [11,12]

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Conclusion