Dual (magnetic and pH) stimuli-reversible Pickering emulsions based on poly(2-(dimethylamino)ethyl methacrylate)-bonded Fe3O4 nanocomposites for oil recovery application

Stimuli-responsive Pickering emulsion system has received considerable scientific interests for myriad applications. In this contribution, nanocomposites (PDMNC) made of Fe3O4 nanoparticle and poly2-(dimethylamino) ethyl methacrylate] were prepared through a facile sonochemical in situ co-precipitat...

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Main Authors: Low, Liang Ee, Ooi, Chien Wei, Chan, Eng Seng, Ong, Boon Hoong, Tey, Beng Ti
格式: Article
出版: Elsevier Science Ltd 2020
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在線閱讀:http://eprints.um.edu.my/36793/
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總結:Stimuli-responsive Pickering emulsion system has received considerable scientific interests for myriad applications. In this contribution, nanocomposites (PDMNC) made of Fe3O4 nanoparticle and poly2-(dimethylamino) ethyl methacrylate] were prepared through a facile sonochemical in situ co-precipitation approach and were used in the preparation of Pickering emulsion system (PDMNC-PE). PDMNC-PE exhibited pH-responsive behavior and it was stable at pH ranging from 5 to 9. Upon magnetic exposure, PDMNC-PE underwent repeatable and rapid emulsification/demulsification triggered by a change in pH for at least six cycles. The stabilization/destabilization of PDMNC-PE was caused by the synergistic effect from magnetic force, surface hydrophobicity and zeta potential of PDMNC in response to pH, which resulted in the adsorption/desorption of PDMNC at the interface of the Pickering emulsions. The magnetic- and pH-reversible PDMNC-PE has a great potential for application in oil recovery.