Ultrasonic degradation of aqueous carboxymethylcellulose: Effect of viscosity, molecular mass, and concentration

Antti Grönroos (Corresponding Author), Pentti Pirkonen, Hanna Kyllönen

Research output: Contribution to journalArticleScientificpeer-review

44 Citations (Scopus)

Abstract

It is well established that prolonged exposure of solutions of macromolecules to high-energy ultrasonic waves produces a permanent reduction in viscosity. It is generally agreed as well and also this study proved the hydrodynamic forces to have the primary importance in degradation. According to this study the sonolytic degradation of aqueous carboxymethylcellulose polymer or polymer mixtures is mainly depended on the initial dynamic viscosity of the polymer solution when the dynamic viscosity values are in the area range enabling intense cavitation. The higher was the initial dynamic viscosity the faster was the degradation. When the initial dynamic viscosities of the polymer solutions were similar the sonolytic degradation was dependent on the molecular mass and on the concentration of the polymer. The polymers with high molecular mass or high polymer concentration degraded faster than the polymers having low molecular mass or low polymer concentration. The initial dynamic viscosities were adjusted using polyethyleneglycol.
Original languageEnglish
Pages (from-to)644 - 648
Number of pages5
JournalUltrasonics Sonochemistry
Volume15
Issue number4
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

Fingerprint

Carboxymethylcellulose Sodium
Molecular mass
Ultrasonics
Viscosity
Polymers
ultrasonics
viscosity
degradation
Degradation
polymers
Polymer solutions
Ultrasonic waves
Macromolecules
Cavitation
high polymers
ultrasonic radiation
Hydrodynamics
cavitation flow
macromolecules
hydrodynamics

Keywords

  • ultrasound
  • degradation
  • carboxymethylcellulase
  • cavitation
  • viscosity
  • molecular mass
  • concentration
  • polyethyleneglycol

Cite this

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abstract = "It is well established that prolonged exposure of solutions of macromolecules to high-energy ultrasonic waves produces a permanent reduction in viscosity. It is generally agreed as well and also this study proved the hydrodynamic forces to have the primary importance in degradation. According to this study the sonolytic degradation of aqueous carboxymethylcellulose polymer or polymer mixtures is mainly depended on the initial dynamic viscosity of the polymer solution when the dynamic viscosity values are in the area range enabling intense cavitation. The higher was the initial dynamic viscosity the faster was the degradation. When the initial dynamic viscosities of the polymer solutions were similar the sonolytic degradation was dependent on the molecular mass and on the concentration of the polymer. The polymers with high molecular mass or high polymer concentration degraded faster than the polymers having low molecular mass or low polymer concentration. The initial dynamic viscosities were adjusted using polyethyleneglycol.",
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Ultrasonic degradation of aqueous carboxymethylcellulose : Effect of viscosity, molecular mass, and concentration. / Grönroos, Antti (Corresponding Author); Pirkonen, Pentti; Kyllönen, Hanna.

In: Ultrasonics Sonochemistry, Vol. 15, No. 4, 2008, p. 644 - 648.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Ultrasonic degradation of aqueous carboxymethylcellulose

T2 - Effect of viscosity, molecular mass, and concentration

AU - Grönroos, Antti

AU - Pirkonen, Pentti

AU - Kyllönen, Hanna

PY - 2008

Y1 - 2008

N2 - It is well established that prolonged exposure of solutions of macromolecules to high-energy ultrasonic waves produces a permanent reduction in viscosity. It is generally agreed as well and also this study proved the hydrodynamic forces to have the primary importance in degradation. According to this study the sonolytic degradation of aqueous carboxymethylcellulose polymer or polymer mixtures is mainly depended on the initial dynamic viscosity of the polymer solution when the dynamic viscosity values are in the area range enabling intense cavitation. The higher was the initial dynamic viscosity the faster was the degradation. When the initial dynamic viscosities of the polymer solutions were similar the sonolytic degradation was dependent on the molecular mass and on the concentration of the polymer. The polymers with high molecular mass or high polymer concentration degraded faster than the polymers having low molecular mass or low polymer concentration. The initial dynamic viscosities were adjusted using polyethyleneglycol.

AB - It is well established that prolonged exposure of solutions of macromolecules to high-energy ultrasonic waves produces a permanent reduction in viscosity. It is generally agreed as well and also this study proved the hydrodynamic forces to have the primary importance in degradation. According to this study the sonolytic degradation of aqueous carboxymethylcellulose polymer or polymer mixtures is mainly depended on the initial dynamic viscosity of the polymer solution when the dynamic viscosity values are in the area range enabling intense cavitation. The higher was the initial dynamic viscosity the faster was the degradation. When the initial dynamic viscosities of the polymer solutions were similar the sonolytic degradation was dependent on the molecular mass and on the concentration of the polymer. The polymers with high molecular mass or high polymer concentration degraded faster than the polymers having low molecular mass or low polymer concentration. The initial dynamic viscosities were adjusted using polyethyleneglycol.

KW - ultrasound

KW - degradation

KW - carboxymethylcellulase

KW - cavitation

KW - viscosity

KW - molecular mass

KW - concentration

KW - polyethyleneglycol

U2 - 10.1016/j.ultsonch.2007.09.005

DO - 10.1016/j.ultsonch.2007.09.005

M3 - Article

VL - 15

SP - 644

EP - 648

JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

SN - 1350-4177

IS - 4

ER -