CO2-Responsive Smart Foams Stabilized by an Extremely Rigid Bio-Based Surfactant

编号 020037701

推送时间 20230109

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 CO2-Responsive Smart Foams Stabilized by an Extremely Rigid Bio-Based Surfactant

来源期刊 Journal of Renewable Materials

期 第377期

发表时间 20230101

关键词 Rosin;  bio-based;  surfactant;  CO2-responsive;  foams; 

摘要 Environment friendly and intelligent surfactants have attracted great attention in recent years. A bio-based CO2 responsive surfactant rosin acid dimaleimide choline (R-BMI-C) with an extremely rigid skeleton was prepared using rosin and choline as raw materials by Diels-Alder addition reaction and acid-base neutralization reactions. Its structure was confirmed by IR and 1H NMR spectra. The foams' properties of R-BMI-C could be adjusted by bubbling CO2/N2 to change the structure of the surfactant. At pH 10.4, R-BMI-C forms an unstable foam with a half-life of 1.5 h. When the pH was reduced to 7.4 by bubbling CO2, R-BMI-C forms an extremely stable foam with a half-life of 336 h. The surfactant R-BMI-C changed from bola type to conventional type when bubbling CO2. And the internal aggregation structure of R-BMI-C aqueous solution changed from spherical micelles to laminar micelles according to the cryogenic-transmission electron microscope. We know that the lamellar structure tends to adsorb at the air/water interface or is trapped in the foam film, which slows down the foam coarsening and agglomeration process, resulting in a significant increase in foam stability. R-BMI-C could be used in oil extraction, fire -fighting and chemical decontamination due to its excellent foaming, stabilization and defoaming properties.

服务人员 尚玮姣

服务院士 宋湛谦

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