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Halloysite/montmorillonoid composite powder and preparation method and application thereof

A composite powder, montmorillonite technology, applied in the field of inorganic powder, can solve the problems of polymer melting and discoloration, easy thermal decomposition, poor heat resistance, etc., to achieve good heat resistance, no bad smell, improve rigidity Effect

Active Publication Date: 2012-07-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the method of application generally also takes melt blending as the most important method, because this method is simple and easy to realize industrialized production, but because the heat resistance of the long-chain quaternary ammonium salt intercalation agent commonly used at present is not good, when polymer melting Thermal decomposition is prone to occur during the extrusion process, so it will cause discoloration, odor and other adverse consequences during the polymer melt processing process, and there is no good solution at present

Method used

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  • Halloysite/montmorillonoid composite powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 1000 grams of sodium-based montmorillonite (produced by Qinghe Chemical Plant, Zhangjiakou, Hebei Province) with 19000 milliliters of water at a concentration of 5 wt %, and stir and disperse through a high-shear disperser (produced by FLUKO, model FA90, with a rotating speed of 3000 rpm) for 1 Hours and placed for 7 days, so that the montmorillonite fully swells in water and peels off. Then disperse again through a high shear disperser to obtain a stable suspension with sufficient peeling between the layers. 1,000 grams of halloysite (Fuyuan Kaolin Co., Ltd., Danjiangkou City, Hubei Province) and 19,000 milliliters of water were stirred and dispersed by a high-shear disperser (same as above) for 1 hour to form a 5 wt % halloysite suspension. Get 1330 grams of dispersed montmorillonite suspensions and 70 grams of halloysite suspensions and mix them in a ratio of 95:5 of their dry weight, and use a laboratory high-shear dispersing emulsifier (produced by FLUKO, model...

Embodiment 2

[0030] The preparation of montmorillonite suspension and halloysite suspension is the same as in Example 1, the only difference is that the standing time of montmorillonite suspension is 10 days, and 1050 grams of montmorillonite suspension and 350 grams of halloysite suspension are taken That is, they were mixed according to the ratio of 75:25 of their dry weight, and the rest were the same as in Example 1. After spray drying, the 2# composite powder with a weight ratio of montmorillonite and halloysite of 75 / 25 was obtained.

Embodiment 3

[0032] The preparation of montmorillonite suspension and halloysite suspension is the same as in Example 1, 700 grams of montmorillonite suspension and 700 grams of halloysite suspension are mixed according to the proportioning ratio of 50:50 of their respective dry weights, and all the other are mixed with the implementation Same as Example 1, the 3# composite powder whose weight ratio of montmorillonite and halloysite was 50 / 50 was obtained through spray drying.

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Abstract

The invention discloses halloysite / montmorillonoid composite powder and a preparation method and application of the halloysite / montmorillonoid composite powder. The composite powder contains halloysite and montmorillonoid with the weight proportion of 5:95 to 95:5. The composite powder is prepared by the method comprising the steps of: a) preparing montmorillonoid and water into a suspension; b) preparing halloysite and water into a suspension and mixing the suspension with the montmorillonoid suspension prepared by step a) to obtain a mixed solution; and c) spraying and drying the mixed solution prepared by step b) to prepare the halloysite / montmorillonoid composite powder. The composite powder provided by the invention does not contain organic components, has good heat resistance, can be used to improve the rigidity of resin, is free from objectionable odor and non-discoloring in the manufacturing process, and can be widely applied to reinforced plastics.

Description

technical field [0001] The present invention relates to an inorganic powder, and furthermore relates to a halloysite / montmorillonite composite powder and its preparation method and application. Background technique [0002] Halloysite is a nano-scale silicate clay mineral. The basic structural unit of halloysite, called halloysite nanotubes, is formed by curling kaolinite sheets under natural conditions, and has a microtubular structure. SiO 2 / Al 2 o 3 Than, the lamellar structure curls into SiO 2 In the outer layer, Al 2 o 3 Inner layer, so the halloysite nanotubes have the same properties as SiO 2 very similar surface properties, and Al 2 o 3 Similar to the properties of the inner layer, generally halloysite nanotubes are curled from multiple kaolin sheets, which are natural multi-walled nanotubes with an outer diameter of 20-100nm, an inner diameter of 5-30nm, and a length of 150nm -2 μm. Natural halloysite nanotubes have a hollow structure similar to carbon n...

Claims

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Application Information

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IPC IPC(8): C08K3/34C08L101/00
Inventor 刘轶群苗壮乔金樑潘国元郭敏
Owner CHINA PETROLEUM & CHEM CORP
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