Can make the sponge such as water absorption generally fast oil? This is probably in many oil spills, people first think of the quickest and easiest way to deal with. Recently from the Institute of Metal Research announced that the researchers using nano-cellulose And graphene, a new type of super-hydrophilic and super-lipophilic sponge was obtained by dip-coating method. Among the water resources in the field of oil-water separation, especially in the case of oil spill accidents at sea and oil-contaminated, Will have a good application prospects.
In recent years, the Institute of Metal Research, Chinese Academy of Sciences Polymer Composite Research Group is committed to research the interaction between nanocellulose and graphene, and confirmed by a large number of experiments with two-dimensional graphene nanocellulose sheet and strong adsorption. , Graphene-based porous materials are usually obtained by chemical vapor deposition, electrochemical deposition and freeze-drying methods.
'It is the interaction of the two nanomaterials that effectively promotes the diffusion and surface adsorption of graphene inside the sponge so that the common sponge can achieve superparental surface properties. "Liu Dongyan, Research Group of Polymer-Polymer Composite, Chinese Academy of Sciences The researchers also said that this is the first time in the world that the superparent polyurethane sponge material obtained directly by dip coating has a contact angle of zero, indicating that water or oil droplets quickly spread and absorb when they are on the surface of the material. The smaller the contact angle, The stronger the absorption of the material is.
It is reported that the new sponge can quickly adsorb water and oil, which provides a new idea for preparing porous elastic materials and composite materials with special wetting properties, and is expected to be applied in the fields of catalyst carriers and intelligent polymer composites.