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Keywords:

  • temperature controlled;
  • water/oil on–off switch;
  • block copolymer;
  • PNIPAAm
Thumbnail image of graphical abstract

A temperature controlled dual water/oil on–off switch is achieved by using a PMMA-b-PNIPAAm block-copolymer coated mesh, determined by the conformational change of the PNIPAAm chain around the lower critical solution temperature (LCST) and also the cooperation between PNIPAAm and PMMA. Water can permeate through the BCP-coated mesh, and oil cannot below the LCST, whereas oil can and water cannot above the LCST.