Sulfonated polyaryletherketone positive-electric particle adsorption membrane and electrospinning preparation method thereof

Abstract

The invention relates to an electrospun fiber membrane and a preparation method thereof, in particular to a positive-electric particle adsorption membrane prepared by using a sulfonated polyaryletherketone (SPEK-C) material and an electrospinning preparation method thereof. The method comprises the basic steps that concentrated sulfuric acid is used for sulfonating a polyaryletherketone (PEK-C) material, deionized water is used for separating the sulfonated polyaryletherketone (SPEK-C) material, N-methylpyrrolidone (NMP) is taken as a solvent to dissolve the SPEK-C to prepare an electrospinning liquid, and finally the SPEK-C fiber membrane for adsorption is prepared by an electrospinning device with a roller. The degree of sulfonation of SPEK-C is deepened with the sulfonation time, and the adsorption capacity is also increased, that is to say that an adsorption active site can be controlled by adjusting a sulfonation parameter; the SPEK-C fiber membrane can be desorbed and regeneratedthrough a desorbent, and the electrospun fiber membrane can be recycled and used many times, is environmentally friendly, and greatly reduces the adsorption cost.

Description

technical field [0001] The patent relates to an electrospinning fiber membrane and a preparation method thereof, in particular to a positively charged particle adsorption membrane of sulfonated polyaryletherketone (SPEK-C) material and an electrospinning manufacturing method thereof. The fiber membrane has the property of being negatively charged in aqueous solution and thus can absorb positively charged particles in aqueous solution. Background technique [0002] The problem of water pollution in my country is prominent. Groundwater in some areas has a certain degree of heavy metal pollution (arsenic, lead, hexavalent chromium, cadmium, etc. exceed the standard), and some direct discharge sea pollution sources discharge heavy metals such as mercury, hexavalent chromium, lead, and cadmium. Residual heavy metals in water have long-term effects, are non-degradable and irreversible, and pose a serious threat to public health. The society is increasingly demanding simple and eff...

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Problems solved by technology

Using electrospinning technology to prepare micro-nano-sized polymer fibers, due to its own structure and size characteristics, it has the advantages of large specific surface area, many active sites, light weight, etc., large adsorption capacity and fast adsorption speed, which solves the problem of pollutants in The problem of small internal diffusion coefficient and slow adsorption speed of the adsorbent; using sulfonation reaction to graft sulfonic acid groups on polyaryletherketone (PEK-C) macromolecules, and utilizing the characteristics of sulfonic acid groups being hydrolyzed in water, making high Molecular fibers are negatively charged in water, thereby using electrostatic force to adsorb positively charged particles in water, including positively charged polymer particles, positively charged ion clusters, and cations, etc. The adsorption active sites are freely regulated through the sulfonation process, which solves the problem of small adsorption capacity. problems, and even further realized the free regulation of the adsorption capacity; using ethanol + NaOH as a desorbent to realize the desorption regeneration of the material, so that the nanofiber membrane can be recycled repeatedly, which greatly improves the utilization rate of the material and greatly reduces the adsorption cost

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