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Synthesis, modification, and demulsification properties of multi-branched block polyether demulsifiers


The author innovatively proposed a block polyether demulsifier. p-Tert-butylphenol amine resin was synthesized by the reaction of p-tert-butylphenol with formaldehyde and tetraethylenepentamine, which was used as an initiator to polymerize with ethylene oxide (EO) and propylene oxide (PO) to generate four multi-branched block polyether demulsifiers with different EO ratios. The demulsifier was characterized by infrared spectroscopy, Physica MCR 301 rheometer, and cloud point method. Then, 4,4′-diphenylmethane diisocyanate (MDI) and (Epichlorohydrin) POCL were used in the polyether demulsifier for oil-soluble and water-soluble modification. Finally, it was found that the oil-soluble emulsifier 159C has excellent demulsification performance and the dehydration rate is 86.2%.

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The datasets generated during and/or analyzed during the current study are available from the corresponding authors on reasonable request.


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The authors are grateful for the reviewers’ instructive suggestions and careful proofreading. This work was supported by the Natural Science Foundation of Shandong Province for Youth (Grant No. ZR2020QE111), the Doctoral Research Startup Project of Binzhou University (Grant No. 2019Y27), and the Postdoctoral Science Foundation of China (Grant No. 2020M681073).

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Correspondence to Lixin Wei or Xinlei Jia.

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Liu, C., Wei, L., Song, Y. et al. Synthesis, modification, and demulsification properties of multi-branched block polyether demulsifiers. MRS Communications (2021).

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