Abstract
A novel copolymer surfactant has been prepared via a free radical copolymerization of CO2-switchable monomer N,N-diethylaminoethyl methacrylate and the hydrophilic monomer sodium vinyl-sulfonate and characterized. The results of conductivity, dynamic light scattering and cryogenic transmission electron microscopy study showed the change of the microstructure of copolymer in water by adding or removing of CO2. The copolymer aqueous solution was found to exhibit reversible switchability by the bubbling of CO2/N2.
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