Antibacterial macromolecular ultra-filtration membrane and preparation method thereof

Abstract

The invention relates to a macromolecular ultra-filtration membrane having a long-term antibacterial effect and a preparation method thereof. The preparation method for the antibacterial macromolecular ultra-filtration membrane comprises the following steps: (a) preparing a macromolecular membrane-preparing solution; (b) adding antibacterial grains into the macromolecular membrane-preparing solution, wherein the antibacterial grains are prepared by compounding inorganic carriers and antibacterial agents and have a long-term slow-releasing function, the weight of the antibacterial grains is 0.01-0.1% of the weight of the macromolecules in the macromolecular membrane-preparing solution, and the grain size of the antibacterial grains is 0.01-10 mu m; and (c) preparing the antibacterial macromolecular ultra-filtration membrane by adopting a dry-wet or wet spinning method through a non-solvent induced phase separation process (NIPS) or a thermally induced phase separation process (TIPS). Afiber ultra-filtration membrane provided by the invention can be applied to the water filtration and purification and has the long-term antibacterial effect. The macromolecular ultra-filtration membrane can be widely applied to the drinking water treatment, the household water purifiers, and the filtration and purification for foods and medicines.

Description

technical field

[0001] The invention belongs to the field of ultrafiltration membranes, in particular to a polymer ultrafiltration membrane with long-term antibacterial effect and a preparation method thereof. The antibacterial polymer ultrafiltration membrane of the invention can be applied to drinking water treatment, household water purifiers, and filtration treatment and purification of food and medicine. Background technique

[0002] Ultrafiltration membrane is a microporous filtration membrane with a pore size in the range of 0.001-0.1 microns. Ultrafiltration membrane separation technology (ultrafiltration) based on ultrafiltration membrane has become a new type of separation process and is widely used in water treatment ( Such as drinking water purification), beverage, biology, food, medicine and other fields.

[0003] Ultrafiltration is a separation process related to the size of the membrane pores. The pressure difference on both sides of the membrane is used as ...