Nonionic surfactant and temperature effects on the viscosity of hydrophobically modified hydroxyethyl cellulose solutions

Guangqiang Zhao, Cho Cho Khin, Shing Bor Chen, Bing Hung Chen

研究成果: Article

30 引文 (Scopus)

摘要

Nonionic surfactant and temperature effects on the viscosity of hydrophobically modified hydroxyethyl cellulose (HMHEC) solutions are investigated experimentally. Weak shear thickening at intermediate shear rates takes place for HMHEC at moderate concentrations and becomes more significant at lower temperatures. While this amphiphilic polymer in surfactant-free solution does not turn turbid by heating to 95°C, its mixture with nonionic surfactant shows a lower cloud point temperature than does a pure surfactant solution. For some mixture cases, phase separation takes place at temperatures as low as 2°C. The drop of cloud point temperature is attributed to an additional attractive interaction between mixed micelles via chain bridging. With increasing temperature, the viscosity of an HMHEC-surfactant mixture in aqueous solution first decreases but then rises considerably until around the cloud point. The observed viscosity increase can be explained by the interchain association because of micellar aggregation.

原文English
頁(從 - 到)14198-14204
頁數7
期刊Journal of Physical Chemistry B
109
發行號29
DOIs
出版狀態Published - 2005 七月 28

指紋

Nonionic surfactants
cellulose
Cellulose
Thermal effects
temperature effects
surfactants
Viscosity
viscosity
Surface-Active Agents
Surface active agents
Temperature
shear
temperature
Micelles
Phase separation
Shear deformation
micelles
Polymers
Agglomeration
aqueous solutions

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

引用此文

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abstract = "Nonionic surfactant and temperature effects on the viscosity of hydrophobically modified hydroxyethyl cellulose (HMHEC) solutions are investigated experimentally. Weak shear thickening at intermediate shear rates takes place for HMHEC at moderate concentrations and becomes more significant at lower temperatures. While this amphiphilic polymer in surfactant-free solution does not turn turbid by heating to 95°C, its mixture with nonionic surfactant shows a lower cloud point temperature than does a pure surfactant solution. For some mixture cases, phase separation takes place at temperatures as low as 2°C. The drop of cloud point temperature is attributed to an additional attractive interaction between mixed micelles via chain bridging. With increasing temperature, the viscosity of an HMHEC-surfactant mixture in aqueous solution first decreases but then rises considerably until around the cloud point. The observed viscosity increase can be explained by the interchain association because of micellar aggregation.",
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Nonionic surfactant and temperature effects on the viscosity of hydrophobically modified hydroxyethyl cellulose solutions. / Zhao, Guangqiang; Khin, Cho Cho; Chen, Shing Bor; Chen, Bing Hung.

於: Journal of Physical Chemistry B, 卷 109, 編號 29, 28.07.2005, p. 14198-14204.

研究成果: Article

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