title: Effect of Sodium Chloride on the Surface and Wetting Properties of Aqueous Solutions of Cocamidopropyl Betaine.
abstract: Surfactants are important ingredients of personal care products and household products. The main characteristic of these compounds is to decrease the surface tension of solvent and resulting many properties such as contact angle, foam properties etc. The coexistence of other ingredients in the product may affect the properties of surfactants. One of the main components contained in almost every personal care and household product is sodium chloride. The main aim of this work was to determine the effect of this salt on some surface and usage properties of cocamidopropyl betaine (CAPB). From our experiments it was shown that the effect of added sodium chloride in the aqueous solutions of CAPB on the properties is the opposite to the one described in the literature for cationic and anionic surfactants, i.e., CMC increases with increasing ionic strength, foam height decreases with increasing salt concentration. Our investigation showed that sodium chloride makes worse the properties of the CAPB solutions examined in this work.
authors.affiliation: Institute of Technology and Chemical Engineering, Poznań University of Technology, pl. Skłodowskiej-Curie 2, 60-965 Poznań, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Staszak
authors.affiliation: Department of Technology and Instrumental Analysis, Faculty of Commodity Science, Poznań University of Economics, al. Niepodległości 10, 61-875 Poznań, Poland.
authors.forename: Daria
authors.initials: D
authors.lastname: Wieczorek
authors.affiliation: Department of Technology and Instrumental Analysis, Faculty of Commodity Science, Poznań University of Economics, al. Niepodległości 10, 61-875 Poznań, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Michocka
keywords: Amphoteric surfactant; Cocamidopropyl betaine; Surface properties