Method of preparing clay/rubber nano composite by slurry blending

Abstract

The invention relates to a method of preparing a clay / rubber nano composite by slurry blending in the technical field of rubber products. The method comprises the steps of preparing clay slurry by mixing clay and water, mixing the clay slurry and rubber by mechanical blending, drying to form a clay / rubber compound, adding other rubber ingredients into the clay / rubber compound by the mechanical blending, and finally obtaining the clay / rubber nano composite by vulcanization. The preparation method of the clay / rubber nano composite is simple in technology, low in water consumption, low in cost, and environmentally friendly, and does not involve organic modification of the clay; the prepared clay / rubber nano composite has excellent mechanical properties; the clay has good dispersion in a rubber matrix.

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.