The effects of the number of imidazoline ring and the length of alkyl group chain of imidazoline derivatives were investigated using quantum chemical calculation,molecular dynamics simulation and experimental techniqu...The effects of the number of imidazoline ring and the length of alkyl group chain of imidazoline derivatives were investigated using quantum chemical calculation,molecular dynamics simulation and experimental techniques.Three corrosion inhibitors including symmetrical lauric acid imidazoline(SAI),tetracyclic lauric acid imidazoline(LAI),and symmetric stearic acid imidazoline(SPI)were synthesized and their inhibition performance was evaluated using weight loss measurement,electrochemical techniques and surface characterization.The results show that SAI and LAI with the same length of alkyl group chain,LAI with more imidazoline rings could supply a better inhibition performance since the increase of active sites.The increase of active sites attached to the metal surface may also change the distribution of corrosion inhibitor,which could limit inhibition performance improvement.While,SAI and SPI with the same number of imidazoline rings,SPI with longer alkyl group chain shows a better inhibition efficiency due to the better hydrophobic performance of alkyl groups.Among the three inhibitors,SPI shows the best inhibition performance,indicating that the alkyl group chain length affects the inhibition performance more obvious than the number of the imidazoline rings.展开更多
研究了烷基糖苷羟丙基磺酸盐阴离子表面活性剂(APGHPS)和咪唑啉两性离子表面活性剂(IMD)复配体系的稳定性、表面活性、泡沫性能、润湿性能和耐硬水性能。结果表明:APGHPS和IMD复配体系稳定性好;复配体系表现出良好的协同增效作用,当n(AP...研究了烷基糖苷羟丙基磺酸盐阴离子表面活性剂(APGHPS)和咪唑啉两性离子表面活性剂(IMD)复配体系的稳定性、表面活性、泡沫性能、润湿性能和耐硬水性能。结果表明:APGHPS和IMD复配体系稳定性好;复配体系表现出良好的协同增效作用,当n(APGHPS)∶n(IMD)=1∶1时,增效作用最为明显,此时临界胶束浓度cmc=8.81×10^(-5)mol/L,最低表面张力γcmc=26.2 m N/m,均低于单一组分;复配体系的泡沫性能、润湿性能和耐硬水性能都较单一组分表面活性剂有所提高。展开更多
用烷基糖苷APG0810与两性离子表面活性剂辛基咪唑啉进行复配,测定了复配体系的表面活性、泡沫性能、润湿力和乳化性能。结果表明,APG0810与辛基咪唑啉的复配体系具有一定的协同增效作用。当m(APG0810)∶m(辛基咪唑啉)=5∶1时,对表面活...用烷基糖苷APG0810与两性离子表面活性剂辛基咪唑啉进行复配,测定了复配体系的表面活性、泡沫性能、润湿力和乳化性能。结果表明,APG0810与辛基咪唑啉的复配体系具有一定的协同增效作用。当m(APG0810)∶m(辛基咪唑啉)=5∶1时,对表面活性的增效作用最好,其临界胶束浓度(cmc)为577.53 mg/L,最低表面张力(γcmc)为28.20 m N/m。同时,通过与APG0810进行复配,辛基咪唑啉的润湿力和乳化性能均得到改善,并且在m(APG0810)∶m(辛基咪唑啉)=5∶1时,效果达到最好。展开更多
基金This work was supported by Scientific and Technological Innovation Team for the Safety of Petroleum Tubular Goods in Southwest Petroleum University[grant number 2018CXTD01].
文摘The effects of the number of imidazoline ring and the length of alkyl group chain of imidazoline derivatives were investigated using quantum chemical calculation,molecular dynamics simulation and experimental techniques.Three corrosion inhibitors including symmetrical lauric acid imidazoline(SAI),tetracyclic lauric acid imidazoline(LAI),and symmetric stearic acid imidazoline(SPI)were synthesized and their inhibition performance was evaluated using weight loss measurement,electrochemical techniques and surface characterization.The results show that SAI and LAI with the same length of alkyl group chain,LAI with more imidazoline rings could supply a better inhibition performance since the increase of active sites.The increase of active sites attached to the metal surface may also change the distribution of corrosion inhibitor,which could limit inhibition performance improvement.While,SAI and SPI with the same number of imidazoline rings,SPI with longer alkyl group chain shows a better inhibition efficiency due to the better hydrophobic performance of alkyl groups.Among the three inhibitors,SPI shows the best inhibition performance,indicating that the alkyl group chain length affects the inhibition performance more obvious than the number of the imidazoline rings.
文摘研究了烷基糖苷羟丙基磺酸盐阴离子表面活性剂(APGHPS)和咪唑啉两性离子表面活性剂(IMD)复配体系的稳定性、表面活性、泡沫性能、润湿性能和耐硬水性能。结果表明:APGHPS和IMD复配体系稳定性好;复配体系表现出良好的协同增效作用,当n(APGHPS)∶n(IMD)=1∶1时,增效作用最为明显,此时临界胶束浓度cmc=8.81×10^(-5)mol/L,最低表面张力γcmc=26.2 m N/m,均低于单一组分;复配体系的泡沫性能、润湿性能和耐硬水性能都较单一组分表面活性剂有所提高。
文摘用烷基糖苷APG0810与两性离子表面活性剂辛基咪唑啉进行复配,测定了复配体系的表面活性、泡沫性能、润湿力和乳化性能。结果表明,APG0810与辛基咪唑啉的复配体系具有一定的协同增效作用。当m(APG0810)∶m(辛基咪唑啉)=5∶1时,对表面活性的增效作用最好,其临界胶束浓度(cmc)为577.53 mg/L,最低表面张力(γcmc)为28.20 m N/m。同时,通过与APG0810进行复配,辛基咪唑啉的润湿力和乳化性能均得到改善,并且在m(APG0810)∶m(辛基咪唑啉)=5∶1时,效果达到最好。