MOFs fiber membrane for adsorbing and intercepting micro-nano plastic in water and preparation method thereof

Abstract

The invention belongs to the technical field of processing and application of MOFs fiber membranes, and particularly relates to an MOFs fiber membrane for adsorbing and intercepting micro-nano plastics in water and a preparation method of the MOFs fiber membrane. The preparation method comprises the following steps: putting a fiber fabric, sodium hypophosphite and tetracarboxylic acid into deionized water, stirring for 1 hour, then taking out the fiber fabric, performing rolling twice at 30MPa, baking at 100 DEG C for 5 minutes, performing cleaning with deionized water, and performing drying to obtain a modified fiber fabric; putting the modified fiber fabric into a mixed solution of a long-chain carboxyl organic ligand and protein for 30 minutes, performing fully swelling, taking out the fiber fabric in a swelling state, putting the fiber fabric into a zinc nitrate solution, carrying out in-situ assembly for 5 minutes, taking out the fiber fabric, putting the fiber fabric into a drying oven, treating the fiber fabric at 60 DEG C for 2 hours, cooling the fiber fabric to room temperature, and obtaining the MOFs fiber membrane. The nano MOFs crystalline particles are distributed in swelling holes of cellulose fibers, and the prepared composite membrane material is rich in holes, huge in specific surface area and capable of efficiently adsorbing and intercepting micro-nano plastics in water.

Description

technical field [0001] The invention belongs to the technical field of processing and application of MOFs fiber membranes, and in particular relates to a MOFs fiber membrane for absorbing and retaining micro-nano plastics in water and a preparation method thereof. Background technique [0002] According to the statistics of Science Magazine: About 8 million tons of plastic waste enter the ocean every year in the world, only 1% of which can be collected and processed, and the remaining 99% of plastic waste disappears in the water, forming microplastics and even nanoplastics, which are invisible to the naked eye. affect human health. There are also a lot of micro-nanoplastics in fresh water, such as detergents, clothing microfibers and daily care products will produce a large amount of micro-nanoplastics. [0003] In recent years, researchers have discovered that microplastic pollution is common in inland water bodies in my country. Microplastics continue to be destroyed and...

AI Technical Summary

Problems solved by technology

If micro-nanoplastics in water can be captured directly, the water purification process will be faster, easier, and more economical, and secondary pollution can be avoided. The effective adsorption and interception of 99% of the plastic waste that disappears in the water is an environmental and health problem that human beings urgently need to solve. The preparation of high-performance materials with efficient adsorption and interception of micro-nano plastics in water is very important for water purification.

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