Preparation method of super-hydrophilic super-oleophilic three-dimensional graphene foam material

Abstract

The invention discloses a preparation method of a super-hydrophilic super-oleophilic three-dimensional graphene foam material.The preparation method includes following steps: 1), adopting a classic Hummers and Offema method to prepare oxidized graphene from natural graphene powder to obtain a dispersive oxidized graphene water solution; 2), placing the oxidized graphene water solution obtained in the step 1) in a reaction kettle, dropwise adding a phytic acid solution in corresponding dosage, embedding the reaction kettle in a stainless steel jacket, disposing the stainless steel jacket in an oven for heating, maintaining 180 DEG C, reacting for 12 h, and naturally cooling to room temperature; freeze-drying a product for 24 h to obtain a cylindrical phytic acid doped super-hydrophilic super-oleophilic three-dimensional graphene foam material.The three-dimensional graphene foam material obtained by the preparation method has special property of zero contact angle to water and oil solutions, is efficient in adsorption and gathering of water, various oil liquids and various organic liquids and can be recycled through simple thermal treatment.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophilic and simultaneously superoleophilic three-dimensional graphene foam material. Background technique [0002] Graphene is a planar two-dimensional layered material with a honeycomb lattice structure. Due to its excellent electrical, optical, mechanical and other properties, graphene has attracted wide attention. Three-dimensional graphene usually refers to a two-dimensional graphene assembly with a three-dimensional structure, and is a new type of functional material in the field of graphene chemistry. Integrating two-dimensional graphene sheets into three-dimensional assemblies can effectively control the electrical, optical, mechanical, catalytic and surface wettability of graphene. Therefore, three-dimensional graphene materials not only have the inherent physical and chemical properties of graphene, but also have three-dimensional porous Micro / nanostructures also have excellent prope...

AI Technical Summary

Problems solved by technology

At present, most of the reports on the surface wettability of three-dimensional graphene are single-wetting hydrophobic or superhydrophobic three-dimensional graphene. and hydrophobic interaction, irreversible agglomeration and stacking occurred, but there is no report on the three-dimensional graphene foam material with both hydrophilic and lipophilic double wettability

Images