Search

CN-121975208-A - Antibacterial plastic pipe based on metal-organic framework and preparation method thereof

CN121975208ACN 121975208 ACN121975208 ACN 121975208ACN-121975208-A

Abstract

The invention provides an antibacterial plastic pipe based on a metal-organic framework and a preparation method thereof. The preparation method comprises the following steps of firstly preparing Cu-MOF from copper nitrate hydrate and trimesic acid, then mixing Polyethylene (PE), ethylene-vinyl acetate copolymer (EVA) and the Cu-MOF, and extruding by an extruder to obtain the antibacterial plastic pipe. The antibacterial plastic pipe based on the metal-organic framework has the advantages of excellent thermal stability, good biocompatibility, long-acting antibacterial property and the like.

Inventors

  • MAO XIAOYU
  • LIU YAN
  • HUANG PEIPEI
  • CHEN SHUNSHUN
  • WU DAN
  • WANG ZEFENG

Assignees

  • 丽水学院

Dates

Publication Date
20260505
Application Date
20240305

Claims (6)

  1. 1. An antibacterial plastic pipe based on a metal-organic framework and a preparation method thereof are characterized in that the preparation method of the antibacterial plastic pipe comprises the following steps: (1) And (3) preparing the Cu-MOF, namely adding DMF, ethanol, deionized water, copper nitrate hydrate and trimesic acid into a round-bottom flask, fully and uniformly stirring, and then placing the round-bottom flask into an oil bath at 80-90 ℃ and continuously shaking for 18-28 h. After the mixture is cooled to 23-28 ℃, filtering by using a Buglex funnel to obtain crystals, and washing 3-4 times by using dichloromethane. And finally, placing the crystal in a vacuum oven at 100-150 ℃ to be dried for 25-30 hours to obtain the Cu-MOF. (2) The preparation of the antibacterial plastic pipe comprises the steps of mixing Polyethylene (PE), ethylene-vinyl acetate copolymer (EVA) and Cu-MOF, and extruding by a single screw extruder to obtain the antibacterial plastic pipe.
  2. 2. The preparation method of claim 1, wherein in the step (1), the volume ratio of DMF, ethanol and deionized water is 1 (1-1.2), the mass ratio of trimesic acid and copper nitrate hydrate is 1 (1.8-2.2), and the volume (mL) ratio of the mass (g) of trimesic acid to DMF is 1 (16-20).
  3. 3. The method of claim 1, wherein the copper nitrate hydrate in step (1) is one of copper nitrate hexahydrate, copper nitrate hemi-pentahydrate, and copper nitrate tri-hydrate.
  4. 4. The method according to claim 1, wherein the polyethylene in the step (2) is a mixture of Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE), and the mass ratio of the Low Density Polyethylene (LDPE) to the High Density Polyethylene (HDPE) is 1 (1.8-2.2).
  5. 5. The preparation method of claim 1, wherein in the step (2), the mass ratio of Cu-MOF, ethylene-vinyl acetate copolymer (EVA) and Polyethylene (PE) is 1 (5-35) (25-165).
  6. 6. The method of claim 1, wherein the extruder temperature in step (2) is set at 119 ℃, 135 ℃, 168 ℃, 165 ℃, 160 ℃, 166 ℃ and the die temperature is 165 ℃.

Description

Antibacterial plastic pipe based on metal-organic framework and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to an antibacterial plastic pipe based on a metal-organic framework and a preparation method thereof. Background The plastic products have extremely wide application range in daily life, namely the plastic products, but bacteria are extremely easy to multiply in water during pipeline transportation, and serious threat is generated to human health, so that the plastic products with a certain antibacterial effect are urgently required to be developed, and the harm of the bacteria in the water to human is reduced. At present, a small amount of antibacterial agent is added into a plastic base material in the research of antibacterial plastics, so that the plastic product has certain antibacterial performance. The antibacterial agents are mainly classified into inorganic, organic and natural biological antibacterial agents. The natural antibacterial agent mainly comes from animals and plants, and has the defects of complex extraction process, difficult mass production and the like. The organic antibacterial agent comprises quaternary amine salts, quaternary phosphine salts, imidazoles, pyridines and the like, has the advantages of quick sterilization effect, but has poor safety, chemical stability and heat resistance, and is easy to generate microbial drug resistance. The common inorganic antibacterial agents can be divided into two major types, namely a metal element antibacterial agent and a photocatalysis type antibacterial agent, and the market occupation rate of the inorganic antibacterial agent is gradually improved due to the advantages of high safety, good heat resistance and the like of the inorganic antibacterial agents, but the metal element antibacterial agents widely studied at present have certain defects, such as high price of silver ion-based nano materials in a large-scale production process, once silver ions are released and accumulated, the silver ions are possibly harmful to human health, the nano silver still has unstable condition, and is easily converted into silver oxide under illumination to influence the antibacterial effect, and in addition, the photocatalysis type antibacterial agents have the defects of narrow light response range, insufficient catalytic activity, lower antibacterial efficiency and the like, so that antibacterial plastic products directly added with the inorganic antibacterial agents do not have high-efficiency, long-acting and broad-spectrum antibacterial effects. The Metal Organic Framework (MOF) is a novel low-toxicity porous crystal material, has a large specific surface area and uniformly distributed catalytic active sites, can be used as a reservoir of antibacterial agents, and has been studied at present to show that the Cu-based MOF has broad-spectrum antibacterial performance. However, the problems of agglomeration, unstable release or burst release of the antibacterial agent and the like can also occur in the polymer of the metal organic frame, so that the antibacterial performance of the material is affected. Therefore, the development of the plastic pipe with the efficient and long-acting antibacterial effect based on the metal-organic framework has important significance. Disclosure of Invention Aiming at the problems in the prior art, the invention aims to provide an antibacterial plastic pipe based on a metal-organic framework and a preparation method thereof, and aims to develop a plastic pipe based on the metal-organic framework and having high-efficiency and long-acting antibacterial effect. The technical scheme of the invention is as follows: an antibacterial plastic pipe based on a metal-organic framework and a preparation method thereof, wherein the preparation method of the antibacterial plastic pipe comprises the following steps: (1) And (3) preparing the Cu-MOF, namely adding DMF, ethanol, deionized water, copper nitrate hydrate and trimesic acid into a round-bottom flask, fully and uniformly stirring, and then placing the round-bottom flask into an oil bath at 80-90 ℃ and continuously shaking for 18-28 h. After the mixture is cooled to 23-28 ℃, filtering by using a Buglex funnel to obtain crystals, and washing 3-4 times by using dichloromethane. And finally, placing the crystal in a vacuum oven at 100-150 ℃ to be dried for 25-30 hours to obtain the Cu-MOF. (2) The preparation of the antibacterial plastic pipe comprises the steps of mixing Polyethylene (PE), ethylene-vinyl acetate copolymer (EVA) and Cu-MOF, and extruding by a single screw extruder to obtain the antibacterial plastic pipe. Preferably, in the step (1), the volume ratio of DMF, ethanol and deionized water is 1 (1-1.2), the mass ratio of trimesic acid and copper nitrate hydrate is 1 (1.8-2.2), and the mass ratio of trimesic acid to DMF (mL) is 1 (16-20). Preferably, the copper nitrate hydra