Study on the synthesis and performances of water-soluble imidazoline amide
Reaction raw material molar ratio of tetraethylenepentamine∶ pelargonic acid ∶ acetic acid = 1∶1∶4.5.Using methylbenzene as water carrier,the water-soluble imidazoline amide was synthesized by end-group amidation dehydration reaction,acetamidation dehydration reaction and cyclic dehydration reac-tion.The water solubility test of water-soluble imidazoline amide under different mass fractions was carried out according to the national standard method.The results show that the synthesized water-soluble imid-azoline amide has excellent water solubility.The structure of water-soluble imidazoline amide molecules was optimized by GaussView 6 visualization software,and the energy distribution of the highest occupied molecular orbital(HOMO)and the lowest unoccupied molecular orbital(LUMO)were obtained.The highest occupied orbital energy(EHOMO)and the lowest unoccupied orbital energy(ELUMO)were obtained by the quantitative simulation calculation and analysis of Gaussian 16 software.We have revealed the cor-rosion inhibition performance of water-soluble imidazoline amide based on the frontier orbital theory.At the same time,the corrosion inhibition performance of water-soluble imidazoline amide was studied by weight loss method,and the SEM morphology analysis further proved that the synthesized water-soluble imidazoline amide had good corrosion inhibition effect.
synthesiswater-soluble imidazoline amidefrontier orbital theorycorrosion inhibition performance
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