21631-87-8

Usage

InChI:InChI=1/C20H40N2O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-20-21-16-17-22(20)18-19-23/h23H,2-19H2,1H3

Upstream product

• 25065-63-8 hexadecanoic acid [2-(2-hydroxy-ethylamino)-ethyl]-amide 
• 57-10-3 1-hexadecylcarboxylic acid 
• 111-41-1 2-(2-Aminoethylamino)ethanol 

Relevant academic research and scientific papers

2-(2-Pentadecyl-4, 5-dihydro-1H-imidazol-1-yl)ethanol as a sustainable inhibitor for copper corrosion in molten hydrated phase change materials

An imidazoline derivatives, 2-(2-pentadecyl-4, 5-dihydro-1H-imidazol-1-yl)ethanol (PDIE) was synthesized with the help of microwave radiation and its inhibiting effect on copper corrosion was investigated in phase change materials (PCM) melts by using gravimetric measurements, electrochemical techniques and quantum chemical calculations. Results show that the addition of PDIE inhibitor greatly decreases the mass transportation at Cu/PCM interface and reduces the corrosion rate of copper by adsorbing on the copper surface. As the concentration of studied inhibitor reaches to the optimal 0.5 mM, the inhibition efficiency is maximized, reaching over 70percent at 333 K. Thermodynamic analysis indicates that the adsorption process of PDIE molecule is a mixed physisorption and chemisorption obeying Langmuir isotherm. Surface screening shows that the inhibited copper remains almost morphologically intact and the presence of PDIE compounds on copper surface are confirmed by XPS, EDS and FTIR detections. Local reactivity analysis reveals that the imidazoline ring and heteroatoms are the active sites of PDIE molecule. The corrosion inhibition mechanism is provided through both experimental tests and theoretical studies.

Synthesis and properties of a series of CO2 switchable surfactants with imidazoline group

Switchable surfactants are environment-friendly compounds, which can be separated from the system or lose surface activity after completing their function during one stage of a process. In order to study switchable properties of a kind of CO2 switchable surfactant with an imidazoline group, four 2-alkyl-1-hydroxyethylimidazolines were synthesized by condensation of N-(2-hydroxyethyl)ethanediamine with dodecanoic, tetradecanoic, hexadecanoic, and octadecanoic acids. Then, the series of long-chain alkyl imidazoline compounds were reacted with dry ice to produce imidazolinium bicarbonates cationic surfactants. The critical micelle concentration (CMC) and surface tension at CMC (γcmc) measured by the Wilhelmy plate technique show that these surfactants have excellent surface activity. The changes of conductivity before and after bubbling CO2 show the conversion between imidazolines and imidazolinium bicarbonates cationic surfactants. Conductivity cycles indicated that these surfactants could be switched by CO2 reversibly and repeating this three times. However, their switchable function on the emulsification-demulsification of water-alkane was dissatisfactory due to the emulsibility of amide which was hydrolyzed from 2-alkyl-1-hydroxyethylimidazoline. Therefore, the application of these switchable surfactants needed to be studied further.

Synthesis of Long Chain 2-Alkyl-1-(2-hydroxyethyl)-2-imidazolines under Microwave in Solvent-Free Conditions

An efficient method for the synthesis of long chain 2-alkyl-1-(2-hydroxyethyl)-2-imidazolines, and their amide precursors, by condensing aminoethylethanolamine and several fatty acids under non-solvent microwave irradiation using CaO as support, is described. Products were obtained in good yields and high purity in a few minutes, in both multimode microwave and monomode microwave oven. Evidences of non-thermal microwave effects are given.