Tungsten Disulfide / Attapulgite Composite

Tungsten disulfide has attracted much attention for its excellent lubricity and catalytic performance. Although tungsten disulfide has excellent properties, its properties still need to be further improved in many cases. Compounds with other inorganic substances are one of the ways to improve its properties.

Attapulgite, also known as palygorskite, is a water-rich magnesium-rich silicate clay mineral, which is often used as catalyst carrier or promoter. Recent studies have shown that attapulgite has good lubricity and can be used as lubricant additive. The catalytic and lubricating properties of layered minerals compounded with other inorganic additives such as molybdenum disulfide will be further improved. Therefore, chemical synthesis of layered minerals is one of the important ways to improve their properties.

In order to achieve this goal, it is necessary to compound the two materials. Tungsten disulfide/attapulgite composite material is composed of tungsten disulfide and attapulgite which disperse each other evenly and form a layered structure. The tungsten disulfide particles in the composite are lamellar, and the rods accumulated on the surface of tungsten disulfide particles are attapulgite. The specific process is as follows:

A sodium tungstate and 0.5 parts of attapulgite were placed in 133 parts of water and heated to 80 ℃. The pH value was adjusted to 0.5 by hydrochloric acid. The strong acidic solution was obtained to activate the surface of attapulgite. At the same time, the tungstic acid precipitation was reacted with the activated attapulgite surface to form a uniform mixture of tungstic acid and attapulgite complex precipitation. After the reaction, the tungstic acid/attapulgite composites were filtered, washed and dried. Then the tungstic acid/attapulgite composites were mixed with 10 portions of elemental sulfur and placed in N₂ for 60 minutes at 300 ~℃. After the sulfidation, the temperature was raised to 600 ~℃ for 30 minutes, and then the tungsten disulfide/attapulgite composites were obtained by evaporation desulfurization after cooling.

Tungsten disulfide/attapulgite composite consists of tungsten disulfide and attapulgite, which disperse evenly and form a layered structure. The tungsten disulfide particles in the composite are lamellar, and the rods accumulated on the surface of tungsten disulfide particles are attapulgite. The tungsten disulfide/attapulgite composite is based on the synergistic lubrication and catalytic effect of tungsten disulfide and attapulgite, which can give full play to the lubrication and catalytic properties of the two components, thus making it more widely used in known or unknown fields.

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