The invention discloses a preparation method of magnetic
cellulose aerogel. The method comprises the following steps: firstly carrying out pretreatment on
fiber material, then carrying out modification treatment on the
fiber material, and then carrying out partial
dissolution on the
fiber after modification treatment to prepare an
aerogel cross-linking agent solution; preparing a magnetic materialraw solution; adding alkali and the magnetic material raw solution into a
cellulose solution, and generating magnetic particles in the magnetic material solution; dispersing and adhering the magneticparticles to the surface of the fiber, carrying out
evaporation and concentration on the solution, taking out remaining
cellulose solution, adding a cross-linking agent solution under stirring and heating effects, heating until the temperature is 60 to 100 DEG C, carrying out preliminary gelation on the solution 2 to 6 hours later, and carrying out
vacuum drying and
freeze drying to obtain the magnetic
aerogel. The
magnetic composite aerogel obtained in the invention has the characteristics of
low density,
porosity, elasticity and the like, and due to the introduction of
inorganic particles,the
compressive strength of the material is improved, and the material has the characteristic of
superparamagnetism.