Preparation method of functional cellulose aerogel composite material loaded with TiO2 nanoparticles

Abstract

The invention relates to a preparation method of a functional cellulose aerogel. The method comprises the following steps: generating an acyl hydrazone bond and introducing chemical crosslinking intoaerogel to prepare the functional cellulose aerogel composite material with high mechanical properties. The chemical crosslinking is introduced on the basis of traditional cellulose aerogel, so that the crosslinking degree between cellulose nano-fibers is increased; the compression performance of the cellulose aerogel and the shape keeping performance in a water environment are enhanced and the cracking caused by the fact that a hydrogen bond is damaged in a water environment is reduced; the mechanical properties of the aerogel are improved and the actual applicability of the aerogel is widened; the TiO2 nanoparticles with photocatalytic activity are doped through a suitable method to prepare the functional cellulose composite aerogel with wider applicability, and adsorption and degradation of organic dyestuffs in the atmosphere and a water body are realized.

Description

technical field [0001] The invention relates to a loaded TiO 2 The invention relates to a preparation method of functional cellulose airgel composite material of nanoparticles, which belongs to the technical field of cellulose airgel. Background technique [0002] In recent years, the problem of environmental pollution has been paid more and more attention by people, among which water pollution and air pollution are particularly serious. Among the many treatment methods, the adsorption method has become the most frequently used treatment method for water pollution and air pollution because of its low economic cost, remarkable effect, and simple operation. The adsorption method is to use the porous structure of the adsorbent itself or the special functional groups on the surface of the substance to adsorb harmful substances in the water body and the atmosphere on the adsorbent by physical or chemical methods to achieve the effect of removal. [0003] At present, a large num...

AI Technical Summary

Problems solved by technology

However, traditional cellulose aerogels are formed by hydrogen bond cross-linking between cellulose nanofibers, and their mechanical properties are poor, especially in an aqueous environment, where the hydrogen bonds formed between water molecules and cellulose nanofibers are easily broken. The cross-linking between cellulose nanofibers, therefore, the traditional cellulose airgel has poor mechanical stability in water and is easy to decompose, so it is not suitable for the treatment of water pollution

In addition, ordinary airgel adsorption materials need a more complicated desorption process to achieve reuse after adsorbing air or water pollutants, so the application effect is limited.

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