A method for preparing clay/rubber nanocomposites by slurry blending

Abstract

The invention relates to a method for preparing a clay / rubber nanocomposite material by slurry blending in the technical field of rubber products. Clay is first mixed with water to prepare a clay slurry, the clay slurry is mixed with rubber by mechanical blending, and then dried to obtain a clay / rubber compound; subsequently, other rubber additives are added to the clay / rubber compound by mechanical blending Middle; Finally, clay / rubber nanocomposites were obtained by vulcanization. The preparation method of the clay / rubber nanocomposite material provided by the present invention is simple in process, does not involve clay organic modification, has less water consumption, low cost, and is green and environmentally friendly. The prepared clay / rubber nanocomposite material is dispersed in the rubber matrix Well, composites have excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and in particular relates to a method for preparing a clay / rubber nanocomposite material by slurry blending. Background technique [0002] The rubber industry is an important part of petrochemical industry and occupies a pivotal position in the national economy. Carbon black and silica are the most widely used reinforcing agents in the rubber industry, which can significantly improve the modulus and damage resistance of vulcanized rubber. However, carbon black will cause environmental pollution and depend on the petroleum industry, and a large amount of dust will be generated during the production process; while the production of white carbon black is more complicated, its affinity with rubber matrix is ​​not as good as carbon black, its density is low, and its cost is high. People have been actively seeking a filling and reinforcing agent that can replace carbon black and silica. Clay h...

AI Technical Summary

Problems solved by technology

The in-situ polymerization method is to swell the clay in the liquid monomer, and then the monomer initiates polymerization between the clay layers. This method has a complex reaction system, is difficult to control, has a long reaction time, and the mass fraction of the clay is very low; solution blending The method is to disperse the clay in the organic solvent, add the rubber solution to mix, and then remove the organic solvent. The larger the mass fraction of the clay, the higher the dispersibility requirement, the more solvent is needed, so removing and recovering the solvent becomes very important. It is a big problem, and the use of organic solvents is more harmful to people or the environment; the melt intercalation method is to organically modify the clay, and the modified clay is blended with rubber. Since this method uses organic clay, The organic modification process will greatly increase the cost; the emulsion co-precipitation method is to mix the clay water suspension with the latex, and then add electrolytes for co-flocculation. The whole process consumes a lot of water, resulting in waste of water resources. In addition, the electrolyte solution treatment in the later stage is also a problem.