Preparation method of mono-dispersed colloid particles

A colloidal particle, monodisperse technology, applied in the direction of microsphere preparation, microcapsule preparation, etc., to achieve the effect of adjustable chemical composition of particles, uniform and controllable particle size distribution, and adjustable shape

Active Publication Date: 2015-07-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the development of a preparation method of monodisperse colloidal particles with simple preparation route, low cost of raw materials, environmental friendliness, high yield of colloidal particles, and diverse chemical components of colloidal particles has important practical application value, but also has great challenges.

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  • Preparation method of mono-dispersed colloid particles
  • Preparation method of mono-dispersed colloid particles
  • Preparation method of mono-dispersed colloid particles

Examples

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Embodiment 1

[0035] A certain amount of Al 2 (SO 4 ) 3 18H 2 O dissolved in deionized water to form a clear and transparent solution. This solution was named solution one. Then a certain amount of anhydrous sodium acetate (NaAC) was dissolved in deionized water to form a clear and transparent solution. This solution was named solution two. Solution two was added to solution one to form a clear and transparent solution, and the mixed solution was stirred at room temperature for 1 hour to fully mix the two solutions. The final mixture composition molar ratio is Al 2 (SO 4 ) 3 18H 2 O:NaAC:H 2 O=1:4:247. The mixture was transferred to a stainless steel crystallization autoclave lined with polytetrafluoroethylene, and the crystallization autoclave was placed in an oven at 200 °C for 24 hours for hydrothermal treatment. After the hydrothermal treatment was completed, the solid product in the crystallization tank was centrifuged and washed three times with deionized water, and then t...

Embodiment 2

[0038] A certain amount of KAl(SO 4 ) 2 12H 2 O dissolved in deionized water to form a clear and transparent solution. This solution was named solution one. Then a certain amount of anhydrous sodium acetate was dissolved in deionized water to form a clear and transparent solution. This solution was named solution two. Solution two was added to solution one to form a clear and transparent solution, and the mixed solution was stirred at room temperature for 1 hour to fully mix the two solutions. The final mixture composition molar ratio is KAl(SO 4 ) 2 12H 2 O:NaAC:H 2 O=1:2:176. The mixture was transferred to a stainless steel crystallization autoclave lined with polytetrafluoroethylene, and the crystallization autoclave was placed in an oven at 200 °C for 24 hours for hydrothermal treatment. After the hydrothermal treatment was completed, the solid product in the crystallization tank was centrifuged and washed three times with deionized water, and then the solid was ...

Embodiment 3

[0041] A certain amount of Al(NO 3 ) 3 9H 2O dissolved in deionized water to form a clear and transparent solution. This solution was named solution one. Then a certain amount of anhydrous sodium acetate was dissolved in deionized water to form a clear and transparent solution. This solution was named solution two. Solution two was added to solution one to form a clear and transparent solution, and the mixed solution was stirred at room temperature for 1 hour to fully mix the two solutions. The final mixture composition molar ratio is Al(NO 3 ) 3 9H 2 O:NaAC:H 2 O=1:2:139. The mixture was transferred to a stainless steel crystallization autoclave lined with polytetrafluoroethylene, and the crystallization autoclave was placed in an oven at 200 °C for 24 hours for hydrothermal treatment. After the hydrothermal treatment was completed, the solid product in the crystallization tank was centrifuged and washed three times with deionized water, and then the solid was dried...

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Abstract

The invention relates to a synthetic method of mono-dispersed colloid particles and particularly relates to a hydrothermally promoted double hydrolytic method. In a preparation process, metal strong acid salt is mixed with another weak acid strong alkali salt to form a clear and transparent solution, and the mixed solution is hydrothermally treated at a certain temperature to promote double hydrolytic reaction of the two salts so as to generate a series of uniformly-dispersed colloid particles including metal hydroxides and metal oxides. The preparation method has the advantages of simple preparation route, low raw material cost, environmental friendliness and the like, and can guarantee high yield of the colloid particles and diversity of chemical components of the colloid particles.

Description

technical field [0001] The invention relates to a method for preparing monodisperse colloidal particles. The specific method is a hydrothermally promoted double hydrolysis method, which belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Monodisperse colloidal particles have attracted extensive interest in nanotechnology, optics, electronics, medical diagnosis, and drug release due to their special physical and chemical properties. In terms of the synthesis of monodisperse colloidal particles, some effective synthetic routes have been invented, among which the uniform precipitation method has always been the most simple, effective and cheap method. In particular, the method of increasing the pH value of the solution by hydrolysis of urea has been widely used. However, due to the release of carbonate ions during the hydrolysis of urea, the types of chemical components of the obtained colloidal particles are limited, and generally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 白鹏吴萍萍阎子峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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