Nano modification high-density polyethylene composite material and method for preparing same

Abstract

The invention provides a nano modification high-density polyethylene composite material and a method for preparing the same and relates to the preparation of a high-performance high-density polyethylene composite material. The invention provides the method for preparing the nano particle / high-density polyethylene composite material. According to the technical scheme of the invention, modified nano barium sulfate powder, high-density polyethylene, a double-screw extruder, a granulator and an injection molding machine are adopted. The method is characterized by: fully mixing the modified nano barium sulfate and the dried high-density polyethylene materials in a ratio (the nano particle accounts for 1 to 5 percent of the mass of the high-density polyethylene); adding the mixture to the double-screw extruder at an operating temperature of between 170 and 220 DEG C, a screw speed of between 160 and 220r / min and a charging screw speed of between 30 and 150r / min; extruding the mixture out ofthe extruder after melting and co-blending the mixture, water cooling the obtained product; granulating the product by the granulator; drying the particle, and injection-molding the particle into thenano modification high-density polyethylene composite material by the injection molding machine. The method is applied to the preparation of the nano modification high-density polyethylene composite material.

Description

technical field [0001] The invention relates to a high-performance high-density polyethylene nanocomposite material and a preparation method thereof. Background technique [0002] The average particle size of inorganic nanoparticles is in the transition zone between macro and micro, with many surface atoms, large specific surface area and high surface energy, and can show unique characteristics such as small size effect, surface effect and macroscopic quantum tunneling effect, and has many conventional materials. With unique characteristics, nanoparticles can significantly modify polymers, endowing polymer materials with some special properties. [0003] The existing invention patent "Preparation of a High-performance High Molecular Weight Polyethylene / Layered Silicate Nanocomposite Material" (publication number: CN 1300234C) realizes the organic polymer in layered silicic acid through coupling treatment and micro-crosslinking. The adhesion between the outer surface of the ...

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Problems solved by technology

[0004] The above three disclosed invention patents have all improved the mechanical strength of polyethylene to a certain extent, but the price of layered nano-silicate and carbon nanotubes is expensive, and the surface treatment process is complicated; although the price of nano-calcium carbonate is low, its preparation The tensile strength of the nano-composite material has been improved to a certain extent, but the improvement of the impact strength of polyethylene is very limited, and a preparation method of nano-modified high-density polyethylene composite material that can not only improve the strength but also reduce the cost is needed

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