Peanut hull graphene compound aerogel oil absorption material and preparation method thereof

Abstract

The invention relates to a peanut hull graphene compound aerogel oil absorption material and a preparation method thereof. The compound aerogel is prepared by using peanut hulls and graphene oxide asraw materials and thiourea as crosslinker, graphene slices are separated through gas generated by thiourea under high temperature and high pressure and form a three-dimensional porous structure with the peanut hulls. According to the preparation method, graphene oxide slices are separated by utilizing the gas generated by thiourea under high temperature and high pressure through a hydrothermal method; and the surface of the graphene slices are modified with functional groups, so that the graphene slices can be better combined with the peanut hull powder and form the three-dimensional porous network structure due to interaction. The three-dimensional porous network structure has large toughness and high strength, cannot be easily broken even being saturated and adsorbed, the graphene is further reamed by the peanut hulls, the specific surface area of a material is increased, and the oil absorption performance is greatly reinforced.

Description

technical field [0001] The invention relates to a peanut shell graphene composite airgel oil-absorbing material and a preparation method thereof, belonging to the technical fields of chemistry and environment. Background technique [0002] The pollution caused by oily waste water, waste liquid, and offshore oil spills has caused damage to the living conditions of the earth's organisms. Oil film pollution will cause serious damage to aquatic organisms. The oil film prevents oxygen from entering the water body, making the water body anoxic, and oil Washing up on the beach can also have a serious impact on the surrounding creatures. This just forces the mankind to urgently need to develop a large amount of excellent oil-absorbing materials. [0003] Good oil slick absorbent material, with hydrophobicity and lipophilicity, high oil absorption, low cost and stable floating on the water surface, but traditional oil absorbent materials have various problems: such as low oil absorp...

AI Technical Summary

Problems solved by technology

[0003] Good oil slick absorbent material, with hydrophobicity and lipophilicity, high oil absorption, low cost and stable floating on the water surface, but traditional oil absorbent materials have various problems: such as low oil absorption capacity, high material cost, buoyancy properties Poor, absorbs oil as well as water

However, the construction of three-dimensional graphene structures only relies on weak electrostatic interactions, hydrogen bonds, or π-π bonds between graphene sheets. It is difficult to achieve high mechanical properties of three-dimensional graphene structures, and the mechanical strength is low. broken

[0005] Chinese patent document CN104998589A discloses a preparation method of high-efficiency oil-absorbing carbon airgel material. In this invention, carbon nanotubes are first dispersed in a dispersion liquid containing ethanol and surfactants, and then self-treated with highly dispersed graphene oxide. Assembled, the obtained three-dimensional graphene-carbon nanotube composite material, although the composite material solves the problem of uneven dispersion of carbon nanotubes, it is relatively brittle after saturated adsorption, has low strength and is easy to break

Cellulose and hemicellulose are high-molecular polymers composed of sugar units connected by glycosidic bonds. They contain many hydrophilic oxygen-containing functional groups, have good flexibility and excellent mechanical properties. At present, peanut shells, except for a small part Except for feed, most of them are thrown away and burned, causing great waste of resources and environmental pollution

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