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Tuning Interfacial Activity of Polymeric Resin–Surfactant/ n ‐Alcohol Solution Interactions
Author(s) -
Velásquez Ingrid,
Muñoz Aaron,
Pereira Juan C.
Publication year - 2016
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-016-1849-0
Subject(s) - chemistry , surface tension , pulmonary surfactant , ethylene oxide , alcohol , adsorption , emulsion , aqueous solution , phenol , critical micelle concentration , chemical engineering , gibbs isotherm , polymer chemistry , organic chemistry , polymer , micelle , thermodynamics , copolymer , biochemistry , physics , engineering
Measurements of surface tension were carried out for several aqueous solutions of different amphiphilic systems. This research studied the interaction between two polymeric resins (more structure definition) (PR) and nonyl phenol ethoxylates (NP) with degrees of ethoxylation varying from 10 to 20 ethylene oxide groups. The results show that in mixtures of PR and NP 20 EO, the adsorption on the surface was lower, with the molecules tending to remain within the liquid. On the other hand, mixtures of PR and NP 10 EO have resulted in greater surface adsorption. The effect of the added alcohols was to tune the interfacial activity of the PR as function of the PR and alcohol concentrations. The general tendency of the surface tension curves to decrease with increasing PR/alcohol concentration in solutions was not significantly modified with the addition of alcohols; however, the surface tension values changed due to the addition of alcohols and a model is proposed to explain these changes, as they depend on both alcohol chain length and the PR/alcohol concentration. An emulsion stability test was performed on polymeric resins–surfactant systems to determine the correlation between their surface properties. Nonionic surfactants present in these mixtures are mainly responsible for the emulsion stability. It was concluded that mixtures of the less hydrophilic PR (PR_B) with NP 10 EO have good interfacial properties, including a high interfacial concentration and a low critical micellar concentration.