The equilibrium and dynamic surface tension of polymeric surfactants based on epoxidized soybean oil grafted hydroxyethyl cellulose. Issue 68 (6th July 2016)

• Record Type: Journal Article
• Authors: Huang, Xujuan; Liu, He; Shang, Shibin; Cai, Zhaosheng; Song, Jie
• Is Part Of: RSC advances. Volume 6:Issue 68(2016)
• Page Start: 64121
• Page End: 64128
• Publication Date: 2016-07-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra09769c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Analysis of the equilibrium and dynamic surface tension of epoxidized soybean oil grafted hydroxyethyl cellulose (H-ESO-HEC) surfactants with different molecular weights were carried out at pH values that ranged from 8 to 13. Abstract : Analysis of the equilibrium and dynamic surface tension of epoxidized soybean oil grafted hydroxyethyl cellulose (H-ESO-HEC) surfactants with different molecular weights were carried out at pH values that ranged from 8 to 13. A variation in the surface activity of the H-ESO-HEC surfactants was found in the premicellar concentration range because of the formation of surface-active premicellar species, depending on the pH and surfactant concentration. The H-ESO-HEC polymeric surfactants displayed excellent surface properties at pH values that ranged from 9 to 10, and the critical micelle concentration decreased with increasing molecular weight, as expected. The adsorption behavior of H-ESO-HEC polymeric surfactants at the air/solution interface was analyzed by using the Ward and Tordai equation. The effective diffusion coefficients of H-ESO-HEC polymeric surfactants increased with pH values, with the exception of pH 13, and also improved with increasing molecular weight. Furthermore, H-ESO-HEC surfactants with higher molecular weights had larger micelles.