Core@double-shell structured multifunctional phase change microcapsules based on modified graphene oxide Pickering emulsion

New multifunctional phase change microcapsules with paraffin (Pn) as core and GO and lead tungstate (PbWO4) as double-shell were designed by modified GO Pickering emulsion, and the effect of GO content on Pn@GO@PbWO(4)microcapsules was studied. The morphology, chemical composition, and structure of Pn@GO@PbWO(4)microcapsules were characterized, and their performance was studied in depth. The Pn@GO@PbWO(4)microcapsules had a dense shell and a regular spherical structure. Compared with microcapsules without GO addition, the resultant Pn@GO@PbWO(4)microcapsules could demonstrate high phase change reliability and thermal stability. Most of all, the anti-seepage performance had been greatly improved by 67.27%. The results of contact angle (CA) measurement and gamma-ray shielding test showed that the GO and PbWO(4)double-shell multifunctional microcapsules with superhydrophobic property and good gamma-ray shielding property and high anti-seepage performance had great attraction in expanding the application field of phase change materials.

Automated summary

New multifunctional phase change microcapsules with paraffin as core and GO and lead tungstate as double-shell showed high phase change reliability, thermal stability, and improved anti-seepage performance by 67.27% compared to microcapsules without GO addition.