Carbon nanotube/polyolefin conductive composite material and preparation method

Abstract

The invention discloses a carbon nanotube / polyolefin conductive composite material and a preparation method. The composite material is blended by the following components: 100 parts by weight of polyolefin resin (1) and polyolefin resin (2); and 0.5-4 parts by weight of carbon nanotube, wherein the weight ratio of the polyolefin resin (1) to the polyolefin resin (2) is (90-50):(10-50). The method comprises melt blending of the components according to the using amounts to prepare the carbon nanotube / polyolefin conductive composite material. The carbon nanotube / polyolefin conductive composite material of the invention can effectively reduce the adding amount of carbon nanotube, is simple in preparation process, can greatly improve the material conductivity with few adding amount, and can realize mass continuous production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and furthermore, relates to a carbon nanotube / polyolefin conductive composite material and a preparation method thereof. Background technique [0002] Carbon nanotubes (CNTs) were first discovered by Iijima [Iijima S. Helical microtubles of graphitic carbon. Nature. 1991, 354: 56-58] of NEC Corporation of Japan in 1991. It is a new type of carbon structure, which can be regarded as It is a seamless hollow tube structure formed by curling single-layer or multi-layer graphene sheets, and the two ends are sealed by fullerene hemispherical end caps. CNTs have excellent mechanical and mechanical properties, good electrical and thermal conductivity, and can also exhibit excellent field emission properties, hydrogen storage, and wave absorption, so they have attracted extensive attention in various fields such as physics, chemistry, and materials. [0003] In 1994, Ajayan [Ajayan PM., Stephan O, Collie...

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Problems solved by technology

The method of in-situ polymerization and solution blending has better dispersion of CNTs in the matrix, and the electrical properties of the material can be greatly improved when the addition amount is small, but the operation process is complicated, and the solution blending method cannot achieve a large number of continuous production; while the melt blending method is relatively simple to operate and can achieve continuous production in large quantities, but CNTs are prone to agglomeration in the matrix, and it is difficult to achieve effective dispersion. Therefore, the amount of CNTs added is relatively large, which increases the cost; in many preparation methods , CNTs need to be surface modified or used in conjunction with other conductive fillers, which complicates the preparation process

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