CO_(2)-Responsive Smart Foams Stabilized by an Extremely Rigid Bio-Based Surfactant  

作　　者：Weishan Tang Xin Feng Caiyun Lin Xiaoping Rao 

机构地区：[1]College of Chemical Engineering,Huaqiao University,Xiamen,361021,China

出　　处：《Journal of Renewable Materials》2023年第2期523-538,共16页可再生材料杂志（英文）

基　　金：supported by the National Natural Science Foundation of China(32171734);the Scientific Research Funds of Huaqiao University(20BS201).

摘　　要：Environment friendly and intelligent surfactants have attracted great attention in recent years.A bio-based CO_(2)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^(1)H NMR spectra.The foams’properties of R-BMI-C could be adjusted by bubbling CO_(2)/N_(2)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 CO_(2),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 CO_(2).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.

关 键 词：ROSIN bio-based SURFACTANT CO_(2)-responsive FOAMS 

分 类 号：TK6[动力工程及工程热物理—生物能]