High-performance antibacterial spraying-free POM composite material and preparation method thereof

Abstract

The invention discloses a high-performance antibacterial spraying-free POM composite material and a preparation method thereof, wherein the high-performance antibacterial spraying-free POM composite material specifically comprises the following raw materials by weight: 40-80 parts of a POM resin, 2-10 parts of metal toner, 1-8 parts of a dispersing agent and 5-15 parts of functionalized master batch, wherein the functionalized master batch comprises, by weight, 2-8 parts of an elastic ionomer, 2-6 parts of a nano-state aerogel and 2-6 parts of a silver ion antibacterial agent. According to theinvention, the key antibacterial agent component and the aerogel with a nanometer mesoporous structure are subjected to effective master batch premixing and adsorption, so that the good spraying-freeeffect is achieved, and the POM material has broad-spectrum antibacterial effect, wherein the long-acting antibacterial rates of the POM material to three different strains (escherichia coli, staphylococcus aureus and aspergillus niger) are respectively more than 99%; and by using the special toughening agent-ionomer, the spraying-free POM composite material has good rigidity and toughness balance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-performance antibacterial and spray-free POM composite material and a preparation method thereof. Background technique [0002] At present, the trend of aesthetic and environmental design in the fields of modern automobiles, household appliances, industrial electronics and building materials is becoming more and more popular. Some traditional surface painting treatments must be done to obtain special appearance effects such as high-gloss black, metallic luster, diamond luster, etc. It has been gradually obtained by direct injection molding of solvent-free spray-free materials, which has excellent characteristics such as simple process, solvent-free, and high cost performance. [0003] Polyoxymethylene (also known as polyoxymethine, referred to as POM) is a molecular backbone containing [-CH 2 -O-] repeat unit of high linearity, high-performance therm...

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Problems solved by technology

[0004] As a new high cost-effective engineering plastic, POM also has its unavoidable inherent defects, that is, poor thermal stability, narrow processing temperature range (10°C), poor acid and alkali solvent resistance, etc., which affect the modification of POM. And the promotion and application have brought great limitations

The current POM modification scheme usually focuses on the further optimization and improvement of material rigidity. For example, CN102311611 designed a high-rigidity POM composite material modified by calcium sulfate whiskers, while CN108929517 further proposed a high-wear-resistant POM composite material. , using glass fiber and molybdenum disulfide as composite modifiers to improve the surface rigidity and wear resistance of POM; it can be seen from the above that compared with the spray-free PA material with more cases and a wider range of applications, the spray-free POM is then more worthy of in-depth research and vigorously popularizing the new spray-free resin substrate, although CN109679276 has proposed a low VOC, high environmental protection spray-free POM composite material, its key characteristic index is not outstanding, and The one-step melt-mixing modification method does not match the multi-component and multi-functional modification of the spray-free POM composite material, and the modification effect is often difficult to reproduce stably

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