Synthesis
of Triblock Copolymers via RAFT Polymerization
and Their Application as Surfactants for Crude Oil-in-Water Emulsion
Jing Huang
Jun Xu
Kaimin Chen
Tongshuai Wang
Chao Cui
Xiaoming Wei
Rui Zhang
Li Li
Xuhong Guo
10.1021/ie504207r.s001
https://acs.figshare.com/articles/journal_contribution/Synthesis_of_Triblock_Copolymers_via_RAFT_Polymerization_and_Their_Application_as_Surfactants_for_Crude_Oil_in_Water_Emulsion/2197090
As surfactants for crude oil emulsions,
poly[<i>N,N</i>-(dimethylamino) ethyl methacrylate-<i>b-</i>poly(ethylene
glycol) methyl ether methacrylate-<i>b</i>-lauryl methacrylate]
(PDMA-<i>b</i>-PPMA-<i>b</i>-PLMA) triblock copolymers
were synthesized via reversible addition–fragmentation chain
transfer (RAFT) polymerization and characterized by gel permeation
chromatography and proton nuclear magnetic resonance spectroscopy.
The copolymers exhibited high interfacial activity which could be
tuned by simply adjusting the solution pH, and remarkably reduced
the dodecane/water interfacial tension from 52.8 to 2.1 mN/m, producing
stable dodecane-in-water emulsions even at a low concentration of
0.5 mg·mL<sup>–1</sup>. Utilization of these copolymers
in Shengli crude oil further confirmed their emulsification capacity.
The apparent viscosity of crude oil reduced from 34 000 to
350 mPa·s after emulsification at 20 °C, and the formed
emulsions exhibited long-term stability for above 3 months. Due to
the balanced hydrophilicity and hydrophobicity, PDMA<sub>22</sub>-PPMA<sub>27</sub>-PLMA<sub>36</sub> proved to be the most efficient surfactant,
which generated stable O/W emulsion with the smallest dosage.
2015-02-11 00:00:00
surfactant
PDMA
34 000
gel permeation chromatography
emulsification capacity
resonance spectroscopy
Triblock Copolymers
3 months
crude oil
Shengli crude oil
solution pH
triblock copolymers
crude oil emulsions
RAFT Polymerization