Graphene/PVC antistatic composite material and preparation method thereof

Abstract

The invention discloses a graphene / PVC antistatic composite material and a preparation method thereof. The antistatic composite material comprises a PVC base material and a graphene antistatic coatingattached to the PVC base material by a spraying manner, and the coating is composed of, by weight, the following components: 45-50 parts of a plasticizer, 48-54 parts of PVC superfine powder or PVC paste resin, and 1-2 parts of graphene. The preparation method specifically includes the following steps: adding graphene powder to the plasticizer, and obtaining a graphene dispersion liquid by high-speed stirring; adding the PVC superfine powder or the PVC paste resin, and performing standstill and plasticization to obtain graphene antistatic painting after the high-speed stirring; spraying the graphene antistatic painting on the PVC base material to form an antistatic coating; and drying a sample to obtain the graphene / PVC antistatic composite material. The material does not use a volatile solvent, is green and environmentally friendly, is low in total amount of graphene, and has good antistatic performance under the premise of maintaining original mechanical properties of PVC.

Description

technical field [0001] The invention relates to the technical field of synthesis of graphene polymer composite materials, in particular to a graphene / PVC antistatic composite material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the world's top five general-purpose thermoplastic resin materials, and its output is second only to polyethylene. It has good chemical corrosion resistance, abrasion resistance, flame retardancy, etc., and is rich in raw materials and low in price. Therefore, It has been widely used in various fields such as industry, agriculture, coal mine, packaging and construction. But the surface resistance of PVC is as high as 10 14 Ω~10 17 Ω, it is easy to generate static electricity, which can easily cause electrostatic dust collection, discharge, and breakdown, resulting in fire, explosion, and production obstacles. If antistatic performance is given to PVC materials, its application in chemical indus...

AI Technical Summary

Problems solved by technology

Among them, the solution blending method is to dissolve the PVC completely in an organic solution and then disperse the graphene in the PVC solution evenly, and then volatilize the organic solvent to obtain a uniformly mixed graphene / PVC antistatic composite material. A method, which is simple to operate and has the best dispersion effect, but the volatile solution leads to environmental problems. Therefore, the selection and application of low volatility or green and environmentally friendly solutions is the key technology of this method

The melt blending method is the most suitable method for industrial production of graphene / PVC antistatic composite materials. It is a method of mixing graphene, PVC and other additives together, using a closed mixer and extruder to directly mix and process. However, in the process of direct mixing of graphene and PVC, there may be problems such as easy agglomeration or uneven dispersion of graphene

The in-situ suspension polymerization method is a method in which graphene is added to the reaction kettle during the polymerization of PVC monomer and continuously stirred to obtain a graphene / PVC composite material. By this method, more uniformly dispersed graphene can be obtained. / PVC antistatic composite material, however, this method uses a kind of reaction system to finish, and its process is more complicated, and reaction is difficult to control, and especially in the late stage of polymerization reaction, because the existence of graphene and partial vinyl chloride incomplete reaction, gaseous The presence of vinyl chloride monomer may affect the lower cycle operation or cause environmental problems

[0005] In addition, the direct mixing method of graphene or modified graphene and PVC powder can obtain a more uniform graphene / PVC antistatic composite material, but it cannot be completely uniformly dispersed due to the agglomeration of graphene itself. The agglomeration of graphene in PVC is more serious during the melt blending process

Chinese patent application CN 201710070649.4 discloses a preparation method and masterbatch for a graphene / PVC composite material masterbatch, using a solution blending method to prepare a graphene PVC masterbatch, which can be used to further prepare graphite by melt blending Oxygen-modified PVC composite materials have good antistatic properties, but in the industrial production process, the use of volatile organic solvents may cause environmental problems

However, the use of a large amount of volatile organic solvents will cause environmental problems