Lithium ion sieve adsorption membrane with glass fiber as matrix and preparation method thereof

Abstract

The invention relates to a lithium ion sieve adsorption film taking a glass fiber as a matrix and a preparation method of the lithium ion sieve adsorption film. The preparation method comprises the following steps: coating a pretreated glass fiber with silicone sol containing a lithium ion sieve precursor to form a lithium ion sieve precursor film taking organosilicon as an adhesive and a film forming agent; then carrying out high-temperature sintering at the temperature of 500 to 600 DEG C, cooling and then carrying out acid pickling to remove lithium ions and forming the lithium ion sieve adsorption film taking the glass fiber as the matrix, wherein a lithium ion sieve accounts for 40 to 50 percent of total mass of an adsorption film material, the adhesive accounts for 10 to 15 percent of the total mass of the adsorption film material, the balance of the glass fiber and the adsorption capacity of lithium ions is 30 to 50mg / g. According to the lithium ion sieve adsorption film disclosed by the invention, the organosilicon is adopted as the adhesive and the film forming material of the lithium ion sieve, and the defect that the organic adhesive and the film forming agent have hydrophobicity and easily block mass transfer pore channels is overcome; solution loss of the lithium ion sieve can be substantially reduced, the service life of the lithium ion sieve is prolonged and industrial application is facilitated.

Description

technical field [0001] The invention relates to a lithium-ion sieve adsorption membrane with glass fiber as a matrix and a preparation method thereof, in particular to a lithium-ion sieve adsorption membrane with organic silicon as a binder and a film-forming agent and a preparation method thereof, belonging to new energy and new materials. [0002] technical background [0003] Lithium is widely used in fields such as power batteries and nuclear energy, and the market demand is increasing. Lithium resources in nature are mainly stored in seawater, salt lake brine, geothermal water and granite pegmatite deposits, of which lithium reserves in ores are less than 3% of the total reserves, and there is an urgent need to develop salt lake brine, seawater and geothermal water and other dilute lithium liquid resources. Lithium extraction methods from dilute solution mainly include precipitation method, solvent extraction method, evaporation crystallization method, calcination leach...

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Problems solved by technology

It is also reported in the literature that the lithium ion sieve precursor is loaded on the foam ceramics to solve the inconvenience of the powder lithium ion sieve in the application, but the specificity of the ceramic matrix material is large, resulting in the low adsorption capacity of the lithium ion sieve per unit mass.