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A kind of transparent aluminum hydroxide liquid phase dispersion and its preparation method and application

A technology of aluminum hydroxide and liquid phase dispersion, which is applied in the field of nanomaterials, can solve the problems of easy agglomeration and poor dispersion of particles, achieve uniform particle size distribution, small particle size, and reduce the chance of collision or agglomeration

Active Publication Date: 2017-11-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The second technical problem to be solved by the present invention is to provide a preparation method of a transparent aluminum hydroxide liquid phase dispersion; the method adopts a direct precipitation method to prepare nano-aluminum hydroxide particles, and then the product is subjected to constant temperature aging, filtration, washing, Redisperse, and then prepare transparent aluminum hydroxide liquid phase dispersion. Compared with the traditional preparation method, without adding any surfactant, it can well solve the problems of poor dispersion and easy particle size in the application of nano aluminum hydroxide. The problem of agglomeration, thus endowing the product with higher application performance and wider application range

Method used

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  • A kind of transparent aluminum hydroxide liquid phase dispersion and its preparation method and application
  • A kind of transparent aluminum hydroxide liquid phase dispersion and its preparation method and application
  • A kind of transparent aluminum hydroxide liquid phase dispersion and its preparation method and application

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Embodiment 1

[0049] A preparation method of a transparent aluminum hydroxide liquid phase dispersion, comprising the following steps:

[0050] 1) 3.8g aluminum nitrate nonahydrate was dissolved in 50g ethanol to obtain aluminum nitrate solution;

[0051] 2) 2.2g potassium hydroxide is dissolved in 30g ethanol, makes potassium hydroxide solution;

[0052] 3) After the aluminum nitrate solution is stirred evenly, potassium hydroxide solution is added dropwise, the reaction temperature is controlled to be 20° C., the stirring rate is 300 r / min, and the final pH value of the reaction system is adjusted and controlled to be 11 with potassium hydroxide solution;

[0053] 4) After reaching the final pH requirement of the reaction system, continue aging at constant temperature for 1 hour;

[0054] 5) Pour out the solution and let it stand for 1 hour, filter the solution and wash with water to obtain a filter cake;

[0055] 6) Ultrasonic disperse the washed filter cake in 6.4 g of water to obtain...

Embodiment 2

[0058] A preparation method of a transparent aluminum hydroxide liquid phase dispersion, comprising the following steps:

[0059] 1) 7.2g aluminum chloride hexahydrate was dissolved in 150g water to obtain aluminum chloride solution;

[0060] 2) 3.9g sodium hydroxide is dissolved in 160g water, makes sodium hydroxide solution;

[0061] 3) After stirring the aluminum chloride solution evenly, add sodium hydroxide solution dropwise, control the reaction temperature to 30°C, and the stirring rate to 500r / min, adjust and control the final pH value of the reaction system to 8.5 with sodium hydroxide solution;

[0062] 4) After reaching the final pH requirement of the reaction system, heat up to 70°C and age for 2 hours;

[0063] 5) Pour out the solution and let it stand for 8 hours, filter the solution and wash with water and ethanol to obtain a filter cake;

[0064] 6) ultrasonically disperse the washed filter cake in 41.8 g of ethanol to obtain a transparent and stable aluminum...

Embodiment 3

[0068] A preparation method of a transparent aluminum hydroxide liquid phase dispersion, comprising the following steps:

[0069] 1) Dissolve 34.2g of iron-free aluminum sulfate in 120g of methanol to prepare aluminum sulfate solution;

[0070] 2) 20.7g potassium hydroxide was dissolved in 60g methanol to obtain potassium hydroxide solution;

[0071] 3) After the aluminum sulfate solution is stirred evenly, potassium hydroxide solution is added dropwise, the reaction temperature is controlled to be 40° C., the stirring rate is 450 r / min, and the final pH value of the reaction system is adjusted and controlled to be 10 with potassium hydroxide solution;

[0072] 4) After reaching the final pH requirement of the reaction system, heat up to 60°C and age for 4 hours;

[0073] 5) Pour out the solution and let it stand for 5 hours, filter the solution and wash with water and ethyl acetate to obtain a filter cake;

[0074] 6) Ultrasonic disperse the washed filter cake in 15.6 g of ...

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Abstract

The invention discloses a transparent aluminum hydroxide liquid phase dispersion which comprises a liquid phase medium and nano aluminum hydroxide particles, wherein the aluminum hydroxide particles are uniformly distributed in the liquid phase medium; the solid content of the dispersion accounts for 1-30wt%; the one-dimensional size of the nano aluminum hydroxide particles is 1-80nm; the liquid phase medium is a mixture of water, an organic solvent, an organic solvent inter-dissolved with water and water or a mixture of different organic solvents. The invention further discloses a preparation method and an application of the dispersion. The product disclosed by the invention does not contain any surfactants, that is, a long-term stable and uniform dispersing effect can be realized, and the dispersion can be still maintained transparent and stable after long-term standing (longer than or equal to 12 months). The product disclosed by the invention can be used as a flame retardant additive, a toothpaste abrasive, a drug additive, a papermaking filler, a catalyst carrier and the like. The process used by the invention is simple in flow and easy to operate, the raw materials are cheap and easily available, the product purity is high, the quality is good, the experimental repeatability is strong, and the process is easy to amplify.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, more specifically, to a transparent aluminum hydroxide liquid phase dispersion, a preparation method and an application thereof. Background technique [0002] Flame retardants are usually divided into two categories: organic and inorganic. Nano aluminum hydroxide has been widely used as an important inorganic flame retardant material. Adding nano-aluminum hydroxide to synthetic materials can make the material flame retardant, self-extinguishing and smoke extinguishing, which conforms to the development trend of high flame retardancy, low smoke and harmlessness in the flame retardant market. In addition, nano-aluminum hydroxide can also be used as a paper-making filler, used as a surface coating, a filler, and the production of non-combustible paper; it can also be used as a toothpaste abrasive with good performance, replacing traditional raw materials such as chalk and dicalcium phosphate; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/06C09C3/08A61K8/26A61Q11/00A61K47/02D21H17/67B01J32/00C08L63/02C08K9/04C08K9/02C08K3/22D06M15/564D06M11/45
Inventor 陈建峰陈博王洁欣杨丹琪夏怡
Owner BEIJING UNIV OF CHEM TECH
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