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Aqueous polyvinyl alcohol solution foaming at different molecular masses

https://doi.org/10.32362/2410-6593-2021-16-4-337-344

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Abstract

Objectives. Investigation of aqueous polyvinyl alcohol (PVA) foaming process and the influence of its water solution structure, when possessed of different molecular weights and concentrations, on foaming multiplicity.
Methods. Solution foaming analysis was performed on the data of dynamic light scattering obtained on the Zetasizer Nano particle analyzer.
Results. In this work, the foaming ability and foaming multiplicity of aqueous PVA solutions (as a main component for obtaining special-purpose foams) have been studied. It is shown that PVA solutions in water are colloidal dispersed systems consisting of different-sized associates (from 4.8 to 68.1 nm), depending on the molecular weight of PVA. Dependencies of aqueous PVA solution foaming multiplicities on the concentration, molecular weight, and solution temperature were given. Optimal values of concentration and molecular PVA weight, as well as optimal foaming process conditions from aqueous PVA solutions, were established.
Conclusions. Increasing PVA concentrations in aqueous solutions cause foaming multiplicity to decrease for all molecular weights by 1.5 times, and increasing molecular weight increases foaming multiplicity by 2 times. The foaming ratio of aqueous PVA solutions with different concentrations and molecular weights (depending on a solution temperature characterized by a maximum of 30 °C) is associated with decreased viscosity and surface tension.

About the Authors

A. A. Akimova
MIREA – Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)
Russian Federation

Anastasiya A. Akimova, Senior Lecturer, Department of Management Issues Institute of Cybernetics

78, Vernadskogo pr., Moscow, 119454


Competing Interests:

The authors declare no conflicts of interest.



V. A. Lomovskoy
MIREA – Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies); A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation

Viktor A. Lomovskoy, Dr. Sci. (Phys. and Math.), Professor, Department of Chemistry and Technology of Plastics and Polymer Composites Processing, M.V. Lomonosov Institute of Fine Chemical Technologies; Head of the Laboratory of Structure Formation in Dispersed Systems

78, Vernadskogo pr., Moscow, 119454

31, Leninskii pr., Moscow, 119071

Scopus Author ID 38361576700

ResearcherID J-5229-2018


Competing Interests:

The authors declare no conflicts of interest.



I. D. Simonov-Emel’yanov
MIREA – Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)
Russian Federation

Igor D. Simonov-Emel’yanov, Dr. Sci. (Eng.), Professor, Head of the Department of Chemistry and Technology of Plastics and Polymer Composites Processing

78, Vernadskogo pr., Moscow, 119454


Competing Interests:

The authors declare no conflicts of interest.



References

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Supplementary files

1. Dependence of associate distributions by size in 4 vol % aqueous PVA solutions with different molecular weights (Mw): (1) 22000, (2) 81000.
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2. This is to certify that the paper titled Aqueous polyvinyl alcohol solution foaming at different molecular masses commissioned to us by Anastasiya A. Akimova, Viktor A. Lomovskoy, Igor D. Simonov-Emel’yanov has been edited for English language and spelling by Enago, an editing brand of Crimson Interactive Inc.
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  • Foaming ability and foaming multiplicity for aqueous PVA solutions with different molecular weights and concentrations were studied. The influence of the aqueous PVA solution structure was investigated.
  • PVA solutions in water are colloidal dispersed systems consisting of associates with sizes ranging from 4.8 to 68.1 nm, depending on the PVA molecular weight.
  • With increasing concentrations of aqueous PVA solutions, foaming multiplicity decreased by 1.5 times for all molecular weights, while increasing molecular weight caused a two-fold increase.
  • The foaming multiplicity of aqueous PVA solutions with different concentrations and molecular weights, depending on solution temperature, was characterized by a maximum at 30°C, which was associated with decreased viscosity and solution surface tension.

For citation:


Akimova A.A., Lomovskoy V.A., Simonov-Emel’yanov I.D. Aqueous polyvinyl alcohol solution foaming at different molecular masses. Fine Chemical Technologies. 2021;16(4):337-344. https://doi.org/10.32362/2410-6593-2021-16-4-337-344

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ISSN 2410-6593 (Print)
ISSN 2686-7575 (Online)