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Stable nano gold sol synthesized by one-step method in aqueous phase with star polymer

A star-shaped polymer, nano-gold sol technology, applied in the field of nano-gold sol, can solve the problems of difficult application of nano-gold particles, difficult particle size control, low particle purity, etc., and achieves easy operation and repeatability, good antibacterial and anti- Viral activity, low cost effect

Inactive Publication Date: 2009-01-21
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The purity of the prepared particles is not high, the purification process is complicated, and the size of the particles is not easy to control, which brings difficulties to the next application of gold nanoparticles

Method used

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  • Stable nano gold sol synthesized by one-step method in aqueous phase with star polymer
  • Stable nano gold sol synthesized by one-step method in aqueous phase with star polymer
  • Stable nano gold sol synthesized by one-step method in aqueous phase with star polymer

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Chlorauric acid (HAuCl 4 4H 2 O) join in deionized water and dissolve, and be prepared into the A liquid that concentration is 5mmol / L; 24mg take cyclodextrin as the polydimethylaminoethyl methacrylate water-soluble star polymer that core is added to dissolve in 20mL water, Prepare liquid B; drop 5 mL of liquid A into liquid B and mix, stir and react at room temperature for 24 hours to prepare nano-gold sol. The diameter of gold nanoparticles is about 10nm. The sol was stable for 6 months at room temperature.

[0019] The structure of the polydimethylaminoethyl methacrylate water-soluble star polymer with cyclodextrin as the core is:

[0020]

Embodiment 2

[0022] Chlorauric acid (HAuCl 4 4H 2 O) join in deionized water and dissolve, and be prepared into the A liquid that concentration is 5mmol / L; 24mg with pentaerythritol as the polydimethylaminoethyl methacrylate water-soluble star polymer of core is added to dissolve in 20mL water, is prepared into Solution B: drop 5mL of solution A into solution B and mix, stir and react at room temperature for 24h to prepare nano-gold sol. The diameter of gold nanoparticles is about 40nm.

[0023] The structure of the polydimethylaminoethyl methacrylate water-soluble star polymer with pentaerythritol as the nucleus is:

[0024]

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Abstract

The invention relates to a novel method for preparing a high stable nano-gold sol under the condition of aqueous phase by one step. In the method, the aqueous solution of polymethacrylic acid 2-dimethylamino acetate star-shaped polymer is mixed with the aqueous solution of chloroauric acid for reacting at room temperature and the high stable nano-gold sol is obtained. The method is characterized in that the nano-gold sol is prepared at the room temperature, no extra reducing agent or energy is needed, the process is simple and the cost is low; the nano-gold sol is impurity-free, non-toxic and high stable, the particle diameter is small and the particles are distributed evenly. In the invention, no organic solvent is used, thereby meeting the requirements of environmental protection. The gold sol prepared by adopting the method of the invention can be used in the fields of bio-medical treatment, environmental protection, catalysis, coating material, sanitizers, etc.

Description

a technical field [0001] The invention relates to a new method for preparing nano-gold sol, in particular to a one-step aqueous phase synthesis of star-shaped polymer-stabilized nano-gold sol. Two background technology [0002] Nano-metal colloids have shown great application potential in the fields of optics, electricity, magnetism, catalysts, sensing, and biomedicine due to their unique physical and chemical properties that are not available in the bulk. Therefore, the synthesis method is simple, and the preparation of metal colloid particles with controllable particle size and shape has always been a hot spot in nanomaterial science. [0003] Among them, there have been many literature reports on the preparation methods of nano-gold sol particles. At present, the mechanism, characteristics and importance of various preparation methods can be divided into sonochemical methods, electrochemical methods, photochemical methods, microwave chemical methods and chemical redox met...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 高子伟孙华明阳林
Owner SHAANXI NORMAL UNIV
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