Physicochemical Properties and Phase Behavior of Didecyldimethylammonium Chloride/Alkyl Polyglycoside Surfactant Mixtures

Abstract

Mixed surfactant systems, used in many formulations, have aroused great attention and interest from researchers and industry due to the possibility of synergism. Alkyl polyglycoside (APG) and didecyldimethylammonium chloride (DDAC) mixtures combine the excellent properties of pure surfactants and play an important role in the development of multi‐functional washing products. To study the synergism between APG and DDAC, the physicochemical properties of different mixed systems have been investigated. The critical micelle concentration (CMC) is about 180 mg·L−1 and the surface tension at the CMC is about 26.0 mN·m−1 at a mass fraction of 40 % DDAC (ωDDAC40 %). The values are significantly lower than pure surfactants. The foaming property shows the best performance at ωDDAC20 %. When the mass fraction of DDAC is 80 %, the mixture exhibits better wetting and emulsifying properties. Synergism was observed in surface tension, foaming and emulsifying properties, while the wetting ability and detergency exhibited no such effects. Phase behavior of the APG/DDAC/water ternary system has also been carried out by polarized optical microscope. The phase diagram is characterized by a micellar phase, a region where lamellar and micellar phases coexist and a lamellar phase.

Synthesis, Characterization and Surface Properties of Amidosulfobetaine Surfactants Bearing Odd‐Number Hydrophobic Tail

“…Surfactants 2a and 2b attain minimum values of 33.14 and 34.89 mN/m at 2.2 9 10 -4 and 1.04 9 10 -4 mol/L, respectively. These results suggested that CMC decreases by increasing the carbon chain length while the surface tension at CMC (c CMC ) increases [26]. In addition, CMC and corresponding surface tension values are comparable to various known surfactants [21,27,28].…”

Development of a New Multifunctional Cationic Surfactant System with Corrosion Inhibiting Ability

“…These results suggested that CMC decreases by increasing the carbon chain lengths while the surface tension at CMC slightly increases [13]. It is worth noting that CMC and corresponding surface tension values are below the same carbon chain lengths known surfactants [14] and may be originated from hydrophobic effects of propargyl group.…”

Synthesis and Properties of Alkoxyethyl β‐d‐Xylopyranoside

“…According to the literature (Han, Yang, Liu, Wang, & Gao, ), a 20.0 mL aqueous solution of alkoxyethyl β‐ d‐ xylopyranoside ( 6a – 6e ) (0.25%) and 20.0 mL toluene were accurately added into a 100‐mL measuring cylinder with stopper at 25 °C. The cylinder was covered and shaken; the mixture was then allowed to stand for 1.0 h; and the volume of the water layer, the emulsion layer, and the oil layer were recorded, respectively.…”

“…According to the literature (Han, Yang, Liu, Wang, & Gao, 2015), a 20.0 mL aqueous solution of alkoxyethyl β-D-xylopyranoside (6a-6e) (0.25%) and 20.0 mL toluene were accurately added into a 100-mL measuring cylinder with stopper at 25 C. The cylinder was covered and shaken; the mixture was then allowed to stand for 1.0 h; and the volume of the water layer, the emulsion layer, and the oil layer were recorded, respectively. Similarly, the emulsification of alkoxyethyl β-Dxylopyranoside in rapeseed oil/water system was also tested; the corresponding volumes of the water layer, the emulsion layer, and the oil layer were also recorded, respectively.…”