Preparation method of composite separating film filled by interpenetrating polymer network hydrogel

Abstract

The invention discloses a preparation method of a composite separating film filled by an interpenetrating polymer network hydrogel. The preparation method comprises the following steps of firstly, soaking a polymer membrane into a first monomer solution, fetching out, radiating under ultraviolet rays, and crosslinking, so as to obtain a first network gel composite separating film; then, soaking the first network gel composite separating film in a second monomer solution, fetching out, and performing thermal-initiation crosslinking, so as to form the composite separating film filled by the interpenetrating polymer network hydrogel. The composite separating film filled by the interpenetrating polymer network hydrogel has the advantages that the function of adsorbing heavy metal ions is realized; the heavy metal ions in water can be effectively adsorbed in the filtering and separating process; the method is simple, the efficiency is high, the operation is easy, the cost is low, the industrial production is realized, and the property of adsorbing multiple metal ions of copper, lead, mercury, zinc, cadmium, nickel and the like is excellent; the preparation can be used for the treatment of industrial heavy metal sewage, and the removal of heavy metal ions in domestic drinking water.

Description

technical field [0001] The invention relates to a preparation method of a polymer microporous membrane, in particular to a preparation method of an interpenetrating network hydrogel-filled composite separation membrane. Background technique [0002] With the rapid development of industrial production, a large amount of heavy metal wastewater is directly or indirectly discharged into the environment. Heavy metals, such as copper, lead, mercury, zinc, cadmium, nickel, etc., are difficult to biodegrade and are easy to accumulate in organisms. Many heavy metal ions have been proven to be toxic or carcinogenic, causing great harm to human health and the environment. Therefore, the treatment of heavy metal pollution in water is urgent. [0003] At present, there are many methods for removing heavy metal ions from wastewater, mainly including chemical precipitation, ion exchange, adsorption and membrane filtration. These methods have inherent advantages and limitations. The chemi...

AI Technical Summary

Problems solved by technology

Due to the selective compatibility between solvents, membrane materials and additives, the blending method has great limitations, and the adsorption capacity of heavy metal ions is low; in the coating method, since the coating layer is generally combined with the base membrane through physical effects, The interaction is weak, it is easy to fall off from the surface of the membrane, and the stability is poor; the surface grafting method is relatively complicated, requires high equipment, and is not suitable for large-scale industrial production