Preparation of wear resistant rubber composite material

A composite material and wear-resistant rubber technology, which is applied in the preparation field of graphite/rubber composite materials, can solve the problems of difficult suspension, poor hydrophilicity, and lack of ion exchange performance, and achieve simplified preparation process and excellent mechanical properties , The effect of improving the mechanical properties

Inactive Publication Date: 2009-06-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the realization of this method depends on the characteristics of clay. Compared with clay, expanded graphite has poor hydrophilicity and does not have ion exchange properties, so it is very difficult to prepare its suspension in water.

Method used

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  • Preparation of wear resistant rubber composite material
  • Preparation of wear resistant rubber composite material
  • Preparation of wear resistant rubber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.5 g of graphite intercalation compound (expandable graphite) is heated and expanded in a microwave oven with a power of 750 W for 30 seconds to obtain expanded graphite. Repeat this expansion process until 10g of expanded graphite is collected. At this time, the layers of expanded graphite are larger and overlap each other, and the entire graphite particles are worm-like. The expanded graphite was immersed in 15L deionized water containing 50g of surfactant sodium lauryl sulfonate and stirred for 24 hours. At this time, most of the graphite would be wetted by the water and sink to the bottom of the beaker. Take out the floating graphite in the unsoaked part, and dry it at 120°C to a constant weight after washing, which is 2g. Then the mixed solution is treated with ultrasonic for 2.5 hours, the infiltrated expanded graphite particles are crushed and refined and the graphite flakes are dispersed, thereby obtaining a water suspension system of graphite nano flakes, and the ...

Embodiment 2

[0032] The operation steps are the same as in Example 1. The ultrasonically treated expanded graphite aqueous suspension was mixed with 178 g of carboxyl nitrile butadiene rubber latex with a solid content of 45%, which contained 80 g of carboxyl nitrile butadiene rubber. Then add 1wt% CaCl 2 The aqueous solution is flocculated, washed, and dried in a blast drying cabinet at 50°C for 24 hours.

[0033] On a double-roller open mill, 110 parts of the above graphite / carboxyl nitrile rubber nanocomposite (100 parts of carboxyl nitrile rubber and 10 parts of graphite) were masticated, and then various additives: 4 parts of DCP were added in sequence, and mixed Refining to obtain a rubber compound. Then vulcanize at 160°C for a positive vulcanization time to obtain a vulcanized rubber. Tested according to national standards, the mechanical properties of the composite material are shown in Table 1, and the transmission electron microscope photo of the composite material is shown figure 2...

Embodiment 3

[0035] The operation steps are the same as in Example 1. The expanded graphite aqueous suspension after ultrasonic treatment was mixed with 400 g of acrylate rubber latex with a solid content of 20%, which contained 80 g of acrylate rubber. Then add 1wt% CaCl 2 The aqueous solution is flocculated, washed, and dried in a blast drying cabinet at 50°C for 24 hours.

[0036] On a double-roller open mill, 110 parts of the above-mentioned graphite / carboxyl nitrile rubber nanocomposite (containing 100 parts of acrylate rubber and 10 parts of graphite) are masticated, and then various additives are sequentially added: 1 part of vulcanizing agent TCY , 1.5 parts of accelerator BZ, 0.2 parts of anti-scorch agent CTP, 1.5 parts of processing aid polyethylene glycol 4000, mixed to obtain a rubber compound. Then vulcanize at 160°C for a positive vulcanization time to obtain a vulcanized rubber. Tested according to national standards, the mechanical properties of composite materials are shown i...

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Abstract

The invention relates to a preparation method of a graphite-modified abrasive resistant rubber composite material. The method comprises the following steps: soaking expandable graphite with laminar crystal layer structure in water or an organic solvent containing a surfactant; preparing a suspension system of nano flaky graphite by stirring and ultrasonic treatment; mixing the suspension system with rubber latex or rubber solution, and then adding a flocculant for breaking latex and flocculating or adding a poor solvent for precipitation; and drying flocculate or precipitate, mixing and vulcanizing to obtain the graphite / rubber composite material. The latex (solution) blending process is introduced into preparation of the graphite / rubber nano-composite material to realize homogeneous dispersion of the graphite in a rubber matrix compound system by a nanoscale size, to cause good strengthening effect and prepare the rubber composite material with excellent mechanical property, low frictional coefficient and high abrasive resistance.

Description

Technical field [0001] The invention relates to a method for preparing wear-resistant rubber composite materials, in particular to a method for preparing graphite / rubber composite materials. The prepared rubber composite material can be used for low friction and high wear resistance rubber sealing products, such as oil seals for automobile engines. Background technique [0002] Rubber sealing products are widely used in various fields of the national economy. There are many factors that affect the friction and wear properties of rubber, such as the structure of the matrix material, the use of fillers, the surface properties of the material, the nature of the grinding surface, the size and shape of the product, And the use conditions of the products, etc. Therefore, the development of rubber sealing materials in recent years is multifaceted. First of all, the application of high-performance elastomer materials in oil seal products is gradually expanding. In addition to nitrile rub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/04C08L13/02C08L33/08C08L7/02C08L9/08C08K9/04C08J3/16C08K3/04
Inventor 田明杨建张立群史俊红
Owner BEIJING UNIV OF CHEM TECH
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