149968-48-9Relevant articles and documents
Effect of a hydrophilic head group on Krafft temperature, surface activities and rheological behaviors of erucyl amidobetaines
Wang, Yuejiao,Zhang, Yongmin,Liu, Xingli,Wang, Jiyu,Wei, Limin,Feng, Yujun
, p. 295 - 301 (2014)
Ultra-long-chain amidobetaine surfactants have become one of the hot topics recently, but the influence of the hydrophilic head group on the aggregation behaviors and the correlation between surface activities and thickening ability have been less documented. In this work, comparative studies on the effect of the hydrophilic group on Krafft temperature (TK), surface activities and rheological behaviors of erucyl amidobetaines with sulfonate, hydroxyl-sulfonate or carboxylate were examined. Compared to the sulfobetaines, the carboxybetaine is more water-soluble; the addition of an hydroxyl group onto the head group of sulfobetaine increases water-solubility leading to a lower TK. Unexpectedly, the nature of the head groups has little effect on the critical micelle concentration and thickening ability of these surfactants. The packing parameter prediction verifies the formation of wormlike micelles which accounts for the strong thickening ability of the surfactant aqueous solutions.
A worm -containing viscoelastic fluid based on single amine oxide surfactant with an unsaturated C22-tail
Zhang, Yongmin,An, Pengyun,Liu, Xuefeng
, p. 19135 - 19144 (2015)
Worm -containing viscoelastic fluids formed by single C22-tailed surfactants have attracted special interests over the past decade due to their unique rheological response. Here, a viscoelastic wormlike micellar solution of erucyldimethyl amidopropyl amine oxide (EMAO) was first reported and investigated. Upon increasing concentration, EMAO can self-assembly into micelles at a very low concentration, and then these micelles grow into long threadlike worms, which further entangle with each other in the semi-dilute region (>0.55 mM), enhancing the viscosity by several orders of magnitude. EMAO worms exhibit a smaller sensitivity to pH at room temperature than those of short-chain counterparts, but show evident pH responsiveness at high temperature due to the presence of multiple hydrogen bonds and cloud point, which is barely observed for short-chain amine oxide surfactants. The hydrogen bonds and cloud point also result in an uncommon thermo-thickening behaviour in a certain temperature range. Compared with short-chain amine oxide worms, EMAO worm possesses stronger thickening ability, better biodegradable and lower toxicity, giving it a rich prospective for use in gel cleaners, clear fracturing fluids, etc. This journal is
Erucic acid amide propyl dimethyl (b) synthesis of amine (by machine translation)
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Paragraph 0004, (2017/02/23)
This invention involves a kind of erucic acid amide propyl dimethyl amine synthesis of (b). Erucic acid amide propyl dimethyl (b) amine synthesis method, comprising the following steps : (1) and with a reflux condenser is added in the stirring device and erueidate N three-necked bottle, N-dimethylamino propylamine (or N, N-ethyl amino propylamine ; (2) potassium hydroxide under the protection of argon, in the 160 °C reaction under 12h ; (3) after the reaction is ended rotary evaporation to remove the unreacted N, N-dimethylamino propylamine (or N, N-ethyl amino propylamine), that is, to obtain the product erucic acid amido propyl dimethyl (b) amine. states the erucic acid the invention the amide propyl dimethyl (b) amine synthesis method, the operation is simple, can be easily prepared on site, very little equipment required. (by machine translation)
