Electret melt-blown polypropylene material and preparation method thereof

Abstract

The invention discloses an electret melt-blown polypropylene material and a preparation method thereof. The electret melt-blown polypropylene material is prepared from, by weight, 0.5-2 parts of nano cellulose, 97.7-99.4 parts of melt-blown polypropylene and 0.1-0.3 part of an antioxidant. The nano cellulose is added into the material, the nano cellulose is distributed in a polypropylene matrix to prevent the crystalline state of polypropylene by utilizing the higher length-diameter ratio and smaller particle size of the nano cellulose, and is limited by the rod-like structure of the nano cellulose, so that polypropylene crystals distributed around the nano cellulose easily grow into a slender shape along the wall of the nano cellulose, so charge drift is effectively prevented. Meanwhile, the surface of the nano cellulose is rich in hydroxyl, has relatively high activity, effectively attracts and traps charges, and prevents charge loss. Therefore, the electron capturing capability and the lasting electrification capability of the polypropylene melt-blown non-woven material after electret treatment are improved, the filtering effect of the material is improved, and the service life of the material is prolonged.

Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to an electret melt-blown polypropylene material and a preparation method thereof. Background technique

[0002] Polypropylene melt-blown nonwovens have the characteristics of ultra-fine fibers, large specific surface area, small voids, and high porosity. They can play the advantages of high efficiency and low resistance in general filtration, and achieve the purpose of blocking dust and bacteria and viruses. PP non-textile materials are currently widely used in medical masks, air filtration products, etc. At the same time, the market has also put forward higher requirements for materials. The commonly used treatment method is that the polypropylene meltblown nonwoven material is given a large amount of electrostatic charge on the surface of the material through corona electret treatment, which can make the surface of the meltblown filter material achieve bette...