Abstract

Nanomaterials have been developed to solve kinds of water pollution problems. Fluorinated graphene (FG) and multi-walled carbon nanotubes (MWCNTs) are used to improve the efficiency of oil/water separation of sponge via forming MWCNTs/FG/PU sponge in this work. The tests show that the two-dimensional FG can be adsorbed on the PU sponge, and one-dimensional MWCNTs can intertwine on the FG nanosheets as threads to fix on the skeletons of the PU sponge, which will form the micro-nano hierarchical structures and low surface energy surface. The surface contact angle of the MWCNTs/FG/PU sponge comes to the point of 158°, which indicates the MWCNTs/FG/PU sponge is superhydrophobic. The superhydrophobic MWCNTs/FG/PU sponge has outstanding ability to separate various oil/water mixtures effectively, and the corresponding absorbency of oils and organic reagents is over 15 g/g.

摘要

已经开发出纳米材料来解决各种水污染问题。在这项工作中，氟化石墨烯 (FG) 和多壁碳纳米管 (MWCNT) 通过形成 MWCNT/FG/PU 海绵来提高海绵的油/水分离效率。测试表明，二维FG可以吸附在PU海绵上，一维MWCNTs可以像线一样缠绕在FG纳米片上，固定在PU海绵的骨架上，形成微纳米层次结构和低表面能表面。MWCNTs/FG/PU海绵的表面接触角达到158°，表明MWCNTs/FG/PU海绵具有超疏水性。超疏水MWCNTs/FG/PU海绵具有出色的有效分离各种油/水混合物的能力，