Surfactivity of a Series of Nonionic Fluorocarbon Surfactant − Perfluorousnonenyl Polyethylene Glycol Ether

Abstract:

The surfactivity of nonionic fluorocarbon surfactants, polyethylene glycol perfluoro-nonyl monoether (C₉F₁₇-PEG-n) and diether (C₉F₁₇-PEG-n-C₉F₁₇), was systematically investigated, including the surface tensions (γ), critical micelle concentration (CMC), cloud point, foaming property and emulsifiability. The relation between their surface performance and their chemical structure of C₉F₁₇-PEG-n and C₉F₁₇-PEG-n-C₉F₁₇ were studied. The result showed that this series of fluorocarbon surfactant possessed high surface activity, the CMC < 2.8 × 10^-4 mol/L and the γ_CMC < 25 mN/m. Compared to C₉F₁₇–PEG-n, C₉F₁₇-PEG-n-C₉F₁₇ have smaller minimum molecular area (A_min), greater saturated adsorption quantity (Γ_m), lower cloud point, poorer emulsifiability in toluene and greater foaming volume for their aqueous solutions. For either C₉F₁₇-PEG-n or C₉F₁₇-PEG-n-C₉F₁₇, with the increase of the PEG molecular weight (PEG-n), Γ_m declines, A_min increases and the emulsifiability in toluene becomes better, the CMC, γ_CMC and cloud point of their aqueous solutions increases, and their foaming volumes increase first and then decline, getting the maximum value at n=1000.

• Periodical: Advanced Materials Research (Volume 1101)
• Pages: 261-267
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1101.261
• Online since: April 2015
• Authors: Hong Xin Shi*, Hao Miao Zhou, Hai Min Shen, Hong Ke Wu
• Keywords: Cloud Point, Emulsifiability, Foaming Property, Nonionic Fluorocarbon Surfactant, Surface Tension, Surfactivity

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