Dispersion liquid with adjustable optical properties and preparation method thereof

[0039] According to one embodiment of the present invention, the anisotropic nanostructure is a two-dimensional non-(intrinsically) magnetically anisotropic nanostructure.

[0040] In a further preferred embodiment, the anisotropic nanostructure is selected from one or both of non-magnetic nanosheets and nanodisks.

[0041] In a further preferred embodiment, non-magnetic anisotropic nanostructures are non-magnetic nanosheets.

[0042] According to the present invention, the nonmagnetic anisotropic nanostructure is selected from inorganic materials, including one or more of mineral materials such as montmorillonite, gibbsite, laponite and vermiculite, preferably including montmorillonite, more It is preferably montmorillonite, for example, there are crystal plane diffraction peaks at 2θ of 7.10° and 19.7° in the XRD spectrum of the montmorillonite.

[0043] According to the present invention, it is particularly preferred to choose montmorillonite nanosheets as the non-magnetic an

[0096] Prepare montmorillonite@ferric oxide two-dimensional magnetic nanocomposite, as follows: prepare 100 mL of 1 mg / mL montmorillonite aqueous suspension; pass nitrogen gas into the suspension, keep stirring, and add 1.0 mmol of ferric chloride React with 0.5mmol of ferrous sulfate at 60°C for 5 minutes; continue to add 5mL of ammonia water, react at 60°C for 30 minutes, centrifuge, wash and dry the above suspension to obtain montmorillonite@ferric oxide two-dimensional Magnetic nanocomposites;

[0097] The prepared montmorillonite@iron tetroxide two-dimensional magnetic nanocomposite material was added to 0.001mol / L hydrochloric acid to prepare a 0.125mg / mL dispersion, and stirred evenly to obtain a stable colloidal dispersion;

[0098] Place a magnet 2 cm away from the colloidal dispersion.

[0100] The experimental process of Example 1 was repeated, the only difference being that the prepared montmorillonite@ferric oxide two-dimensional magnetic nanocomposite material was added to 0.001mol / L hydrochloric acid to prepare a 0.25mg / mL dispersion.