High-strength and low-percolation UHMWPE (ultrahigh molecular weight polyethylene)/superconductive carbon black composite material and preparation method thereof

Abstract

The invention discloses a high-strength and low-percolation UHMWPE / superconductive carbon black composite material and a preparation method thereof. The high-strength and low-percolation UHMWPE / superconductive carbon black composite material is composed of, by weight parts of 85-98.9 parts of UHMWPE powder, 1-14.8 parts of superconductive carbon black, 0.1-0.6 part of antioxidant and 0.1-0.6 partof coupling agent. The preparation method of the high-strength and low-percolation UHMWPE / superconductive carbon black composite material comprises raw material drying, high-speed mixing and preparation of UHMWPE / superconductive carbon black hybrid particles, and high-temperature press forming. When the added amount of the superconductive carbon black is 1 wt%, the high-strength and low-percolation UHMWPE / superconductive carbon black composite material achieves a conductivity up to 10<-5> s / cm and is low in percolation value and high in tensile strength and tenacity. A conductive sheet press-formed by the high-strength and low-percolation UHMWPE / superconductive carbon black composite material is not only endowed with excellent mechanical performance comparable with that of the ultrahigh molecular weight polyethylene, but also endows ultrahigh molecular weight polyethylene engineering plastics with new special functions such as anti-static property and electromagnetic shielding.

Description

technical field [0001] The invention belongs to a preparation method of high-strength and low-percolation UHMWPE / superconducting carbon black conductive composite material. Background technique [0002] With the further development of electronic and electrical equipment, the application of polymer conductive composite materials has been rapidly developed. Ultra-high molecular weight polyethylene has many excellent properties, such as wear resistance, impact resistance, chemical corrosion resistance, self-lubrication, etc., but there are many shortcomings: low heat distortion temperature, low hardness, low strength, poor temperature resistance , high melt viscosity, poor fluidity and other shortcomings, which limit its application, to modify its UHMWPE, the modification methods mainly include physical modification (filling modification), chemical modification (copolymerization modification, cross-linking modification and cross-linking modification) Lianlian, etc.) and polyme...

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Problems solved by technology

Ultra-high molecular weight polyethylene has many excellent properties, such as wear resistance, impact resistance, chemical corrosion resistance, self-lubrication, etc., but there are many shortcomings: low heat distortion temperature, low hardness, low strength, poor temperature resistance , high melt viscosity, poor fluidity and other shortcomings, which limit its application, to modify its UHMWPE, the modification methods mainly include physical modification (filling modification), chemical modification (copolymerization modification, cross-linking modification and cross-linking modification) United, etc.) and polymer blending modification, through modification, the defects of UHMWPE itself can be improved, and the characteristics of heat resistance, flame retardancy, antistatic and other aspects can be improved.

However, the Achilles heel of this type of method is that although the conductivity of the material is improved, it often results in a decline in mechanical properties such as strength and toughness.

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