Synthesis and emulsifying performance of polyester sodium olefin sulfonate polymer as a CO2-switchable surfactant

被引：0
|
作者：
Tian L. [1 ]
Wang J. [1 ]
Liu Q. [1 ]
Tang T. [1 ]
Wu J. [1 ]
机构：
[1] Hunan Provincial Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Provincial Key Laboratory of Adv
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 12期
关键词：
CO[!sub]2[!/sub]-switchable performace; Emulsifying performance; Emulsion; Polymer; Surfactant;
D O I：
10.13801/j.cnki.fhclxb.20210531.004
中图分类号：
学科分类号：
摘要：
Polymer surfactants are widely used in scientific research and industrial fields such as food, agriculture and spanning. In order to reduce the side effect caused by the residual of the inactive polymer after most of the practical application process, designing and developing switchable polymer surfactants is of great significance and application value. A CO2-switchable surfactant Poly(N, N-Diethylaminoethyl methacrylate-sodium vinylsulfonate) (P(DEAEMA-SVS)) has been synthesized by free radical polymerization. The structure and molecular weight distribution of P(DEAEMA-SVS) were characterized by 1H-NMR and GPC spectra. The stability of P(DEAEMA-SVS) emulsion was studied by the surface tension and interfacial tension. The polymer P(DEAEMA-SVS) with the size of about 113 nm and the narrow particle size distribution form via N, N-Diethylaminoethyl methacrylate (DEAEMA) and sodium vinylsulfonate (SVS) of 1:1 mole ratio as reaction monomers, which decrease the surface tension of water to 37.279 mN/m and the interfacial tension of water/paraffin wax to 5.492 mN/m. It is indicated that P(DEAEMA-SVS) polymer is an effective CO2-switchable O/W surfactant to stabilize emulsion as a only emulsifier. The surface activity and CO2 response of the polymer were evaluated by mixing the aqueous solution (1wt%) with paraffin wax. Bubbling CO2 for 30 min to the milky emulsion, it turns into clear and bubbling N2 for 30 min at 60℃, and converts to its original state, showing excellent cyclic performance of de-emulsification and re-emulsification process. The research results of emulsification mechanism show that the side-electron mobility and photogenerated electron-hole pairs separation. Chained tertiary amino groups of P(DEAEMA-SVS) polymer protonize and turn into hydrophilic quatemary ammonium salt to destroy the oil/water balance of the emulsion with bubbling CO2, while quatemary ammonium salt deprotonizes and returns into hydrophobic tertiary aminogroups with bubbling N2 at 60℃. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：3996 / 4003
页数：7
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