高等学校化学学报2024，Vol.45Issue(12)：114-123,10.DOI:10.7503/cjcu20240350
十二碳炔基非离子Gemini表面活性剂的制备及性能
Preparation and Properties of Dodecacarbonyl Alkynyl Nonionic Gemini Surfactants
摘要
Abstract
Nonionic Gemini surfactants are a new class of highly efficient surfactants with low surface tension and excellent wettability,which have great potential for application in the field of advanced wet electronic chemicals.Four nonionic Gemini surfactants with different polyoxyethylene chain lengths(n)are synthesized from 2,5,8,11-tetramethyldodec-6-yne-5,8-diol and ethylene oxide,namely P1(n=2),P2(n=4),P3(n=5)and P4(n=7).The chemical structures of the surfactants are identified by Fourier transform infrared(FTIR)and 1H nuclear magnetic resonance(NMR)spectra.The alkyl chain of the 2,5,8,11-tetramethyldodec-6-yne-5,8-diol is hydrophobic and the polyoxyethylene chain is hydrophilic,so the hydrophilic/hydrophobic ratio of the surfactant can be adjusted by adjusting the length of the polyoxyethylene chain.The effects of different polyoxyethylene chain lengths on surface tension,critical micelle concentration(cmc),wetting ability,foam performance,and emulsification capacity are investigated.With increasing the polyoxyethylene chain length,the polarity and hydrophilicity of the surfactant increases,leading to a gradual increase in the cmc.The surface tension at cmc(γcmc,mN/m)decreases and then increases with increasing polyoxyethylene chain length,among which the γcmc of P2 is the lowest,27.19 mN/m,exhibiting excellent surface activity;P2 shows excellent wetting properties with the lowest contact angle of 48° on polytetrafluoroethylene(PTFE)substrate.The foaming and emulsifying properties increase with the length of the polyoxyethylene chain,and P2,P3,and P4 show excellent foaming and emulsifying properties.The excellent emulsi-fying properties of the surfactants are also illustrated by optical micrographs of droplet size and distribution aggrega-tion.By investigating the effects of different polyoxyethylene chain lengths on the surface tension,cmc,wettability,foaming performance,and emulsifying property of dodecacarbonyl alkynyl nonionic Gemini surfactants,we have provided a theoretical basis for the structure-property relationship of surfactants,which is of great significance in promoting the practical applications in the field of wet electronic chemicals.关键词
非离子Gemini表面活性剂/聚氧乙烯链/表面张力/临界胶束浓度/润湿性Key words
Nonionic Gemini surfactant/Polyoxyethylene chain/Surface tension/Critical micelle concentration/Wettability分类
化学化工引用本文复制引用
李雅琪,邢攸美,马杰文,张之钧,胡斌,方伟华,尹云舰,吴振,王国杰..十二碳炔基非离子Gemini表面活性剂的制备及性能[J].高等学校化学学报,2024,45(12):114-123,10.基金项目
国家自然科学基金(批准号:22005021,51373025)、北京市自然科学基金(批准号:2242044)和高校新世纪优秀人才计划项目(批准号:NCET-11-0582)资助.Supported by the the National Natural Science Foundation of China(Nos.22005021,51373025),the Beijing Natural Science Foundation,China(No.2242044)and the Program for New Century Excellent Talents in University,China(No.NCET-11-0582). （批准号:22005021,51373025）
