Method for modifying attapulgite clay

A modification technology of attapulgite clay, which is applied in chemical instruments and methods, inorganic pigment treatment, dyeing low-molecular organic compound treatment, etc. It can solve the problem of destroying organic matter on the surface of attapulgite and affecting the compatibility and dispersion of alcohol-based coatings, etc. problem, to achieve the effect of inhibiting the polymerization reaction, improving compatibility and dispersibility

Inactive Publication Date: 2012-08-08
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Liu Hailong et al. (CN1508197A) used a self-made new cationic surface modifier and attapulgite to carry out stirring modification treatment in a solution with a pH value of 6.3 at 20 ° C. Water-based, but high-speed stirring during the coating preparation process will destroy the organic matter on the surface of the attapulgite, affecting the compatibility and dispersion in alcohol-based coatings

Method used

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  • Method for modifying attapulgite clay
  • Method for modifying attapulgite clay

Examples

Experimental program
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Embodiment 1

[0016] 1) Put 50g of attapulgite powder (200 mesh to 300 mesh) and 5g of nano-Al 2 o 3 Soak the granules in 200ml of aqueous solution, stir continuously in a 60°C water bath for 4 hours, and then let stand for 1 to 2 hours;

[0017] 2) Add 3ml stearic acid and 5ml Tween 80 non-ionic surfactant to the above mixture, and stir for 3 hours;

[0018] 3) Filter the mixture, and wash the filtered attapulgite powder with ethanol solution 4 times;

[0019] 4) Dry and calcine the cleaned attapulgite powder at 100°C to obtain attapulgite powder with outstanding performance.

Embodiment 2

[0021] 1) 1) Put 100g attapulgite powder (300 mesh to 400 mesh) and 15g nano-SiO 2 The granules were soaked in 400ml of aqueous solution, stirred continuously for 4 hours, and then allowed to stand for 2 hours;

[0022] 2) Add 5ml of stearic acid and 8m of polyoxyethylene oleyl ether type nonionic surfactant to the above mixture, and stir for 5 hours;

[0023] 3) Filter the mixture, filter out the attapulgite powder and wash it with methanol solution 4 times;

[0024] 4) Dry the washed attapulgite powder at 80°C to obtain attapulgite powder with outstanding performance.

[0025] Get the modified concavo-convex powder prepared in Example 2, observe with a transmission electron microscope, by figure 1 It can be seen that nano-SiO 2 It is very densely adsorbed on the individual rod-shaped crystals of attapulgite in granular form, and a layer of organic compounds is adsorbed on the surface of attapulgite. The individual rod-shaped crystals of attapulgite powder can be sepa...

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Abstract

The invention discloses a method for modifying attapulgite clay. The method comprises the following steps: adding inorganic particles into attapulgite clay powder; adding mixer in water and stirring for 2-4 hours; then standing for 1-4 hours and drying; adding a compound activating agent of organic carboxylic acid and a nonionic surfactant; stirring for 3-7 hours, standing for 2-4 hours; and filtering and drying to obtain modified attapulgite clay powder. According to the method disclosed by the invention, the compatibility and the dispersity of attapulgite in an alcohol-based solution are improved.

Description

technical field [0001] The invention specifically relates to a method for modifying attapulgite clay in a new alcohol-based paint. Background technique [0002] Attapulgite clay (hereinafter referred to as attapulgite) is a clay mineral mainly composed of hydrous magnesium-rich silicate (attapulgite) with a layer-chain transition structure. High-viscosity attapulgite has excellent thickening properties, Suspension and shake-thaw properties are widely used in paint and paint industries in developed countries. At present, the paint mainly uses alcohol-based organic solution as the main solution, but because the surface of attapulgite contains a large number of hydroxyl groups and is negatively charged, it is hydrophilic and difficult to disperse in organic systems, which cannot reflect the special functions of attapulgite. In order to improve the compatibility and dispersion of attapulgite in organic systems, organic surface modification of attapulgite must be carried out. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/42C09C3/08C09C3/06C09C3/10
Inventor 姚义俊苏静刘斌吴红艳杭烨超
Owner NANJING UNIV OF INFORMATION SCI & TECH
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