2013
DOI: 10.1038/pj.2013.47
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Effect of ultrasound on the aqueous viscosity of several water-soluble polymers

Abstract: The effect of ultrasound (US) on the shear viscosity of water-soluble polymers, polyvinyl alcohol, polyethylene glycol and polyacrylic acid, was studied in aqueous solutions with US exposure of 23, 43, 96 and 141 kHz for an 8.5-9 W US. The US exposure significantly decreased the shear viscosity of the solutions in this order: 434234964141 kHz. When US exposure was stopped, the shear viscosities of the aqueous polymer solutions reverted to their original values. US stimulation during the decrease in viscosity w… Show more

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Cited by 19 publications
(13 citation statements)
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“…This softening of hydrogels during US exposure will be helpful in applications like US drug delivery [ 14 ]. In addition, similar effects on the viscosity properties of US-combined aqueous polymeric systems were reported based on ex situ measurements [ 15 , 16 , 17 ]. However, an in situ analysis of the viscoelastic behavior of the cellulose hydrogels revealed direct US effects on hydrogen-bonding networks in the polymeric matrix [ 13 ].…”
Section: Introductionsupporting
confidence: 71%
“…This softening of hydrogels during US exposure will be helpful in applications like US drug delivery [ 14 ]. In addition, similar effects on the viscosity properties of US-combined aqueous polymeric systems were reported based on ex situ measurements [ 15 , 16 , 17 ]. However, an in situ analysis of the viscoelastic behavior of the cellulose hydrogels revealed direct US effects on hydrogen-bonding networks in the polymeric matrix [ 13 ].…”
Section: Introductionsupporting
confidence: 71%
“…Another important change in the band shape was found at 1238 cm −1 , corresponding to the asymmetric vibration of the sulfate groups of KC and the asymmetric vibration of the CN bond of WPI [42] , [55] , [57] , [59] . There were also differences regarding CC control, in the region between 1400 and 1500 cm −1 corresponding to the vibrations of the carboxylate groups and C-OH vibrations [60] . In general terms, stability in the coacervate system is proportional to the number of interactions between the KC and the WPI, i.e.…”
Section: Resultsmentioning
confidence: 94%
“…Obviously, interfacial studies (for example, in situ monitoring of conformational changes) can easily be applicable for polymerization processes in a liquid state. [114][115][116] This framework will build up more predictive techniques to analyze not only the quantitative but also the qualitative aspects of interfacial phenomena.…”
Section: Conclusion and Future Perspectivesmentioning
confidence: 99%