Preparation method of ultra-high molecular weight polyethylene nano-composite material

Abstract

The invention relates to a preparation method of an ultra-high molecular weight polyethylene nano-composite material. The preparation method includes the steps: dispersing nano-materials into couplingagent treatment solution, and organizing the nano-materials by stirring treatment; grafting the nano-materials with monomer by the aid of ultraviolet grafting reaction and enhancing compatibility ofthe nano-materials and organic materials; performing suction filtration drying treatment on the nano-materials, dispersing the nano-materials into surfactant solution for treatment, and ionizing the nano-materials; dispersing ultra-high molecular weight polyethylene powder into nano-material solution treated by surfactants, compounding the nano-materials and ultra-high molecular weight polyethylene by ultrasonic dispersion, and filtering and drying the nano-materials and the ultra-high molecular weight polyethylene to prepare the ultra-high molecular weight polyethylene nano-composite material. The method has the advantages of simplicity, convenience, low cost, mild reaction conditions, wide applicable matrixes and good development prospect.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of an ultrahigh molecular weight polyethylene nanocomposite material. Background technique [0002] Ultra-high molecular weight polyethylene (UHMW-PE) is a thermoplastic engineering plastic with a linear structure and excellent comprehensive properties. The world's first industrialization was realized in 1957 by Allied Chemical Company of the United States, and then Hoechst Company of Germany, Hercules Company of the United States, Mitsui Petrochemical Company of Japan, etc. were also put into industrial production. China was the first to successfully develop and put it into industrial production in 1964. Due to the conditions at that time, the molecular weight of the product was about 1.5 million. With the advancement of technology, the current molecular weight of the product can reach more than 1 million to 4 million. [0003] The d...

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Problems solved by technology

[0011] Chinese patent CN101348587B discloses a preparation method of ultra-high molecular weight polyethylene / graphite nanosheet conductive composite material, including the following steps: according to the mass percentage of each raw material: ultra-high molecular weight polyethylene 85-99%, graphite 1-15% %; added to the grinding jar, and a coupling agent was added according to the ratio of 0.5% to 1.5% of the graphite mass; grinding balls were added according to a ball-to-material ratio of 1:1 to 6:1; the above ball mill jar was placed on a ball mill, and ball milled; The ball-milled material is dried to obtain a masterbatch; the masterbatch is formed by hot pressing to obtain an ultra-high molecular weight polyethylene / graphite nanosheet conductive composite material, but there are inorganic and organic compounds when the material is blended by the ordinary blending method. Due to the compatibility of the matrix and the poor effect of adding the coupling agent, due to the small particle size and large specific surface area of ​​the nano-components, it is easy to form large aggregates, and the agglomeration and slippage of the nano-components make it impossible to Effective reinforcement, it is difficult to play the role of nanophase, these problems need to be solved to improve the processability of UHMWPE

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