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New amphoteric surfactants containing a 2‐hydroxyalkyl group: II. the dependence of physicochemical properties on the pH value for N‐(2‐hydroxyethyl)‐N‐(2‐hydroxyalkyl)‐β‐alanines
Author(s) -
Hidaka H.,
Moriya M.,
Takai M.
Publication year - 1979
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02676369
Subject(s) - chemistry , cationic polymerization , titration , fourier transform infrared spectroscopy , ethylene oxide , critical micelle concentration , micelle , infrared spectroscopy , adduct , dissociation (chemistry) , inorganic chemistry , polymer chemistry , aqueous solution , organic chemistry , copolymer , chemical engineering , polymer , engineering
The dependence of physicochemical properties on the pH of micellar solutions for N‐(2‐hydroxyethyl)‐N‐(2‐hydroxyalkyl)‐β alanines (HAA) was studied by means of a differential titration method (DTM), Fourier transform infrared (FTIR) spectra, and measurements of critical micelle concentration, surface tension, and foaming power. The aspect of the dissociation of HAA was pursued by DTM. The mutual transformation among cationic, zwitterionic, and anionic forms with the change of pH range was confirmed by FTIR spectroscopy. The micelle formation energy was determined at each pH value. Further, the dependence of surface active properties on the pH value for the adducts of ethylene oxide to Na‐HAA was also investigated.