High-strength antibacterial polyethylene film and preparation method thereof

Abstract

The invention discloses a high-strength antibacterial polyethylene film and a preparation method thereof. The polyethylene film is a film formed by taking a polyethylene microporous film as a substrate and an ethylene-vinyl alcohol copolymer film as a surface layer and chemically bonding the polyethylene microporous film and the ethylene-vinyl alcohol copolymer film through polyvinyl alcohol. The high-strength antibacterial polyethylene film has the beneficial effects that a pomegranate extracting solution is added, so that the bonding strength and the antibacterial property are improved; an ethylene-vinyl alcohol copolymer film is prepared as a surface layer by using a water-induced reversed-phase method, and the precipitation of PVP is accelerated and the formation of pores is accelerated by using the synergistic effect between polyhexamethylene guanidine propionate and PVP, so that the time cost is reduced; acid groups in the polyhexamethylene guanidine propionate are utilized, so that the polyhexamethylene guanidine propionate/metal nanoparticles spontaneously move towards the surface of the film to form a hydration layer, and the film is antibacterial and antifouling; and the chelating property of the polyhexamethylene guanidine propionate on the metal nanoparticles is utilized, the polyhexamethylene guanidine propionate is attached to the surfaces of the metal nanoparticles, agglomeration of the metal nanoparticles is inhibited, and the uniform dispersity is improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a high-strength antibacterial polyethylene film and a preparation method thereof. Background technique [0002] In recent years, the pollution of water bodies has become more and more severe, and the reuse of water bodies has become one of the key research topics. Among them, membrane separation technology is one of the effective methods for wastewater treatment and high-quality water purification. Traditional water treatment membranes are dominated by polysulfide porous layers, but the production process is relatively complicated, and my country is still in the exploratory stage. It is difficult to produce high-quality polysulfide through independent research and development. In recent years, the extensive research on the preparation of polyethylene membranes has led to the rapid development of polyethylene microporous membrane technology. Moreover, the membrane has go...

AI Technical Summary

Problems solved by technology

However, due to the strong hydrophobicity of polyethylene microporous membranes, long-term use in water treatment can easily lead to a decrease in mechanical capacity; there is a problem of protein pollution and adhesion causing pore blockage, resulting in membrane damage and reducing the service life of the membrane.

In addition, when polyethylene microporous membranes are used for water treatment, they are generally used as base membranes in combination with other hydrophilic membrane layers, which have the disadvantages of poor bonding strength and do not have antibacterial properties.