Cellulose-based magnetic aerogel material and preparation method thereof

Abstract

The invention discloses a cellulose-based magnetic aerogel material and a preparation method thereof. The method comprises the following steps: carrying out chemical modification, thereby obtaining high-activity amphoteric cellulose; firmly combining the amphoteric cellulose and a graphene oxide through electrostatic interaction and hydrogen bonding forces and the like to build a framework of the aerogel material. Disperse loading of a magnetic nano ferroferric oxide can be achieved by virtue of the advantages of high surface activity and super-large specific surface area; the structure uniformity and the stability of the magnetic aerogel of the amphoteric cellulose are ensured through the steps of cross-linking, freeze-drying and the like; the characteristics of high specific surface properties, good affinity, biodegradability and the like of the cellulose are kept by the magnetic aerogel; and the magnetic aerogel obtains high surface activity and superparamagnetic property, has the advantages of low cost, high strength, amphoteric characteristic, biocompatibility and the like, has the characteristics of high specific surface area, high loading capacity, high surface activity, intelligent positioning and the like, and has significant adsorption capacity on pollutants such as heavy metal ions and organic molecules.

Description

technical field

[0001] The invention relates to a magnetic airgel material and a preparation method thereof, in particular to a magnetic airgel material based on amphoteric cellulose and a preparation method thereof, belonging to the field of advanced functional composite materials. Background technique

[0002] Magnetic porous materials can be used in general sewage treatment, targeted drug carriers, targeted functional stents, targeted blood vessel blocking materials, targeted medical adsorption materials, microwave adsorption (such as: radar absorption materials) and other fields. focus on. The above application fields require the corresponding materials to have the characteristics of low density, large specific surface area, strong adsorption capacity, and strong loading capacity, while good magnetic properties are the necessary conditions for easy recycling of materials, strong targeting ability, and microwave adsorption. Existing materials are often difficult to meet ...

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