Preparation of a magnetocaloric dual-response SiO2-based green nano-emulsifier by an SET-LRP method and evaluation of its properties

In this study, A green nano-emulsifier (Fe3O4@SiO2@PNIPAM) showing magnetic and thermal responsiveness have been successfully prepared by single-electron-transfer living radical polymerization (SET-LRP). Fe3O4@SiO2@PNIPAM can be easily separated by external magnets, the grafting of PNIPAM increases the heat recovery efficiency of nanoparticles, which is convenient for recycling. The Pickering emulsion prepared by Fe3O4@SiO2@PNIPAM could convert arbitrarily in emulsified state and demulsified state at the external temperature and magnetic field.