Preparation method for conveniently-recyclable magnetic supramolecular gel dye adsorption material

Abstract

The invention discloses a preparation method for a conveniently-recyclable magnetic supramolecular gel dye adsorption material. The method comprises the following steps: mixing halloysite with absolute ethyl alcohol, and adding ferric nitrate into the mixture; stirring so as to enable ethanol to volatilize naturally; then dropwise adding glycol into a solid substance, subsequently calcinating, and further treating with a silane coupling agent so as to obtain a magnetic halloysite subjected to surface hydrophobic modification; and dispersing the modified magnetic halloysite into a solvent, adding a gel factor, heating for completely dissolving gel factors, and cooling, thereby obtaining the magnetic supramolecular gel dye adsorption material. According to the preparation method, a halloysite nano tube loaded with magnetic nano particles is added into a supramolecular gel, so that the defects that the supramolecular gel is low in mechanical strength, difficult in machine shaping, high in recovery difficulty and not beneficial to practical application are overcome; the enhanced magnetic supramolecular gel has favorable dye adsorption performance; furthermore, since the magnetic responsiveness is achieved, separation and recovery after adsorption are convenient.

Description

technical field [0001] The invention belongs to the field of dye adsorption materials, and more specifically relates to a preparation method of a magnetic supramolecular gel dye adsorption material which is easy to recycle. Background technique [0002] Supramolecular gels are a class of soft materials with three-dimensional network structures formed by supramolecular self-assembly. It has great application prospects in the fields of biomedical materials, drug carriers, sensors, molecular switches and molecular recognition. However, an inherent disadvantage of supramolecular gels is their low mechanical strength, which makes them difficult to shape and process, which greatly limits their application range. Therefore, from the perspective of the development trend of supramolecular gels, it is still a challenging task to improve their mechanical strength and endow them with new functions. [0003] The responsiveness of existing supramolecular gels with responsive functions s...

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Problems solved by technology

Although the above method produces a certain adsorption effect, the preparation process of this method is complicated, and the cost of freeze-drying is relatively high; and, because the xerogel will partially destroy the three-dimensional network structure of the gel, which affects the adsorption effect; in addition, this method also has The problem that it is difficult to recover after adsorption has caused great inconvenience to practical applications.

[0006] Although there have been reports in the prior art that halloysite has been used to strengthen supramolecular gels, there are still major deficiencies in the actual application of this halloysite-enhanced supramolecular gel for the adsorption of dye molecules. Although theoretically, halloysite-enhanced supramolecular gels can also adsorb dye molecules, it is also not conducive to practical application and promotion because the adsorbed gels are difficult to separate and recover from the system.

Therefore, although many dye-absorbing materials have been reported, the recovery methods (such as filtration, etc.) used by these dye-adsorbing materials are usually inefficient, costly and time-consuming, and the application of dye-adsorbing materials is very limited.

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