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- W2074328308 abstract "Novel supra-long chain surfactants with double or triple quaternary ammonium salts (Cn-2Am, Cn-3Am, in which n represents a hydrocarbon chain length of 18, 20, and 22) were synthesized, and electrical conductivity and surface tension were used to characterize their properties depending on both the hydrocarbon chain length and number of hydrophilic groups. The Krafft temperatures decreased remarkably with an increase in the quaternary ammonium headgroups, resulting in a high solubility in water. The critical micelle concentration (cmc) increased with an increase in the number of quaternary ammonium moieties in the hydrophilic group, and the difference in the cmc was smaller for Cn-2Am and Cn-3Am than for Cn-2Am and Cn-Am of alkyltrimethylammonium bromide. The surface tension at the cmc was approximately 45 and 48 mN m−1 for Cn-2Am and Cn-3Am with n = 18–22, respectively. This indicated that the supra-long chain surfactants could not efficiently adsorb at the air/water interface and orient by themselves, as is known for conventional surfactants." @default.
- W2074328308 created "2016-06-24" @default.
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- W2074328308 date "2012-05-01" @default.
- W2074328308 modified "2023-09-29" @default.
- W2074328308 title "Supra-long chain surfactants with double or triple quaternary ammonium headgroups" @default.
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- W2074328308 doi "https://doi.org/10.1016/j.jcis.2012.01.033" @default.
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