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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, no ion exchange performance, poor hydrophilicity, etc., and achieve simplified preparation process and excellent mechanical properties , the effect of small aggregate size

Inactive Publication Date: 2011-11-09
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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Heat and expand 0.5 g of graphite intercalation compound (expandable graphite) 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 sheets of expanded graphite are relatively large and overlap each other, and the entire graphite particle is in the shape of a worm. Soak the expanded graphite in 15L of deionized water containing 50g of surfactant sodium dodecylsulfonate, and stir for 24 hours. At this time, most of the graphite will be soaked by water and sink to the bottom of the beaker. The floating graphite in the non-wetted part was taken out, washed and dried at 120° C. to a constant weight of 2 g. Then ultrasonically treat the mixed solution for 2.5 hours, the infiltrated expanded graphite particles are crushed and refined and the graphite flakes are dispersed to obtain a water suspension system of nano-graphite flakes, and the amount of grap...

Embodiment 2

[0032] The operating steps are the same as in Example 1. The expanded graphite aqueous suspension after the ultrasonic treatment is mixed with 178g of carboxylated nitrile rubber latex with a solid content of 45%, which contains 80g of carboxylated nitrile rubber. Then add 1wt% CaCl 2 The aqueous solution was flocculated, washed, and dried in a blast oven at 50°C for 24 hours.

[0033] On the double-roller mill, 110 parts of the above-mentioned graphite / carboxylated nitrile rubber nanocomposites (containing 100 parts of carboxylated nitrile butadiene rubber, 10 parts of graphite) are plasticized, and then add various auxiliary agents successively: 4 parts of DCP, Knead to obtain rubber compound. Then vulcanize at 160°C according to the positive curing time to obtain vulcanized rubber. Tested according to national standards, the mechanical properties of composite materials are shown in Table 1, and the transmission electron microscope photos of composite materials are shown ...

Embodiment 3

[0035] The operating 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 was flocculated, washed, and dried in a blast oven at 50°C for 24 hours.

[0036] On a double-roller mill, masticate 110 parts of the above-mentioned graphite / carboxylated nitrile rubber nanocomposite (containing 100 parts of acrylate rubber and 10 parts of graphite), and then add various auxiliary agents in turn: 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 rubber compound. Then vulcanize at 160°C according to the positive curing time to obtain vulcanized rubber. Tested according to national standards, the mechanical properties of composite materials are shown in Table 1. ...

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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 a wear-resistant rubber composite material, in particular to a preparation method for a graphite / rubber composite material. The prepared rubber composite material can be used for low-friction and high-abrasion 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 properties of the grinding surface, the size and shape of the product, And the conditions of use of the product, 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 has gradually expanded, except for the ap...

Claims

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Application Information

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Patent Type & Authority Patents(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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