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.
Synthesis of gemini ammonium sulfobetaine and its proppant suspension and gel-breaking mechanisms
Ma, Aiqing,Tian, Mimi,Wang, Chen,Wang, Lushan,Wang, Tao,Xiao, Jianhong
, p. 7879 - 7886 (2020)
In this study, gemini ammonium sulfobetaine (GAS) is designed and synthesized using isophorone diisocyanate connecting the ammonium sulfobetaines (AS) to obtain a viscoelastic surfactant exhibiting better viscosification and salt resistance. AS is prepared using the monomers of erucic acid, N-dimethyl-1,3-propanediamine, and 3-chloro-2-hydroxypropanesulfonic acid sodium. The properties of GAS and its proppant suspension as well as the gel-breaking mechanisms are investigated. The critical micelle concentration of GAS is 2.1 × 10-7 mol mL-1. GAS exhibits good salt resistance, and the viscosity is considerably high under acidic conditions. At 0.5 Hz, the storage modulus G′ of GAS is 60, 120, and 640 mPa when the concentration is 0.3, 0.5, and 1.0 wt%, respectively. Its proppant suspension is optimal under acidic conditions. When the pH is high, the setting velocities are clearly observed to increase. When the pH is 12, the rate of decline is more than 50% after 200 min. Some of the worm-like micelles adsorbed on the proppant surface participate in the formation of the three-dimensional network, appropriately supporting the proppant-carrying performance. When potassium permanganate is used as the gel breaker, the characterization of the GAS gel-breaking liquid indicates that the double bond is disintegrrated by the gel breaker. Upon gel breaking, the average hydrodynamic radius of the GAS gel-breaking solution decreases to 176.2 nm from 492.3 nm.
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
A novel gemini viscoelastic surfactant (VES) for fracturing fluids with good temperature stability
Mao, Jincheng,Yang, Xiaojiang,Wang, Dingli,Li, Yongming,Zhao, Jinzhou
, p. 88426 - 88432 (2016/09/28)
A category of gemini surfactants with novel structures were designed and synthesized as thickening agents of clean fracturing fluids in this research. The desired products were characterized by high resolution mass spectrometry (ESI-HRMS) and infrared spectrometry (FT-IR GX). Fluid samples with a formula of 5 wt% of products and 1 wt% of KCl were evaluated. The SEM studies revealed a good network microstructure and obvious viscoelasticity, which is favorable for a proppant suspension. Furthermore, the evaluation of their rheological properties at high temperatures revealed good thermal stabilities of these fluids up to 139 °C, particularly for VES-M (the spacer for the surfactant using methylamine and epoxy chloropropane). Comparative analysis of the rheological properties showed that since long chains of N-substituents in the middle of the molecules could enhance steric hindrance and rigidity, it is unfavorable for molecular entanglement and increases the viscosity of the VES aqueous solution. Proppant-support and gel breaking evaluations were also performed. It can be seen that nearly 100% proppant suspension was observed for 180 min at ambient temperature and complete gel breaking was achieved.
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)
Synthesis and surface activities of amidobetaine surfactants with ultra-long unsaturated hydrophobic chains
Feng, Dan,Zhang, Yongmin,Chen, Quansheng,Wang, Jiyu,Li, Bin,Feng, Yujun
, p. 657 - 661 (2012/11/07)
Recent studies have shown that the surfactants bearing an ultra-long hydrophobic chain (>C18) exhibit unique self-assembly properties. However, their synthesis and surface activities have been less documented. In this work, monounsaturated alkyl dimethyl amidopropyl betaines, UCnDAB (n = 18, 22, and 24), were prepared by the reaction of the corresponding fatty acids with N,N-dimethyl-1,3-propanediamine, followed by quaternization with sodium choloroacetate of the obtained intermediates. The intermediates and final surfactants were characterized by 1H NMR and ESI-HRMS, respectively. Krafft temperature (TK) and surface activities of the surfactants were also examined. It was found that TK of all these surfactants is lower than 0°C, and their critical micellar concentration (CMC) is within the range of 10-3 mmol/L. In addition, the linear relationship between lg CMC and n is still in evidence.
A facile route towards the preparation of ultra-long-Chain amidosulfobetaine surfactants
Chu, Zonglin,Feng, Yujun
experimental part, p. 2655 - 2658 (2010/01/07)
A series of novel, ultra-long-chain amidosulfobetaine surfactants were prepared by amidation of ultra-long-chain fatty acids directly with N,N-dimethyl-1,3-propanediamine in the absence of solvents, followed by quaternization of the intermediates with 1,3-propanesultone in ethyl acetate.
