期刊
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
卷 42, 期 3, 页码 407-415出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2019.1699424
关键词
CO2 responsive; polymeric surfactant; emulsion
资金
- National Natural Science Foundation of China [51674270]
- National Major Project [2017ZX05009-003]
- Major project of the National Natural Science Foundation of China [51490650]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51821092, 51521063]
A new CO2-responsive polymeric surfactant, DEA-SSS, was synthesized via radical polymerization, reducing surface tension and facilitating dispersion and precipitation driven by CO2. Characterization of copolymer solutions with and without CO2 addition was conducted, showing potential for emulsion preparation and nano-emulsion formation through phase transition composition method.
A new kind of CO2 responsive polymeric surfactant (named DEA-SSS) was synthesized by using 2-(diethylamino)ethyl methacrylate (DEA) and sodium styrene sulfonate (SSS) via radical polymerization. The structure and composition of the copolymer were characterized by FT-IR spectrometer, (HNMR)-H-1, and elemental analyzer. It was found that the surface and interfacial tension would be much reduced by adding the synthesized surfactant at low concentration. The amphiphilic copolymer could be dispersed in water after bubbling CO2 and precipitated out upon N-2 injection. The variation of copolymer solution with and without CO2 adding was also characterized by electric conductivity meter and transmission electron microscopy (TEM). Pickering emulsion of liquid paraffin in water was prepared using the copolymer as the sole emulsifier with high speed stirring. It was demulsified after purging with CO2 and emulsified again by removal of CO2. The nano-emulsion was made using method of phase transition composition at elevated temperature through mixing the surfactant with Brij30. When the CO2/N-2 were bubbled circularly, the size distribution of nano-emulsions would change reversibly.
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