Preparation method of water-soluble material in core-shell or core-corona-shell structure

A technology of water-soluble materials and core-shell structure, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of core-shell material yield, purity and water solubility, etc., and achieve good water solubility and process Simple, high core-shell yields

Active Publication Date: 2011-08-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield, purity and water solubility of core-shell materials prepared by existing methods are not very good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0034] Take 100 mL cetyltrimethylammonium bromide-modified gold nanoparticle solution, then use 0.1 mol / L hydrochloric acid aqueous solution to adjust the pH value of the gold nanoparticle solution to 3.57, and add 100 μL pure thioacetamide aqueous solution. Thioacetamide hydrolyzate and gold nanoparticles form stable Au-S chemical bonds on the surface of gold nanoparticles through chemical reaction, and then add 1mL concentration of mercuric chloride aqueous solution of 5mmol / L, because mercury easily forms mercury sulfide colloid with sulfur ( because K spvery small). Therefore, a uniform layer of mercury sulfide colloid can be formed on the surface of gold nanoparticles, that is, the mercury sulfide colloid wraps the gold nanoparticles inside, forming a core-shell with good water solubility with gold nanoparticles as the core and mercury sulfide as the shell. The material of the structure (ie Au@HgS core-shell material). At this time, it can be found that the color of the...

Embodiment 2A

[0035] Example 2 Preparation of Ag@HgS core-shell material

[0036] Take 100 mL of silver nanoparticle solution modified with cetyltrimethylammonium bromide, then use 0.1 mol / L hydrochloric acid aqueous solution to adjust the pH value of the silver nanoparticle solution to 4.0, and add 100 μL of pure thioacetamide aqueous solution. Thioacetamide hydrolyzate and silver nanoparticles can form relatively stable Ag-S chemical bonds on the surface of Ag nanoparticles through chemical reaction, and then add 1mL of mercury chloride solution with a concentration of 5mmol / L, because mercury easily forms mercury sulfide with sulfur colloid. Therefore, a uniform layer of mercury sulfide colloid can be formed on the surface of silver nanoparticles, that is, the mercury sulfide colloid wraps the nano-silver particles inside, forming a core-shell structure with good water solubility, such as nano-silver as the core and mercury sulfide as the shell. material (i.e. Ag@HgS core-shell material...

Embodiment 3A

[0037] Example 3 Preparation of Au@CdS core-shell material

[0038] Take 100 mL of the gold nanoparticle solution modified with cetyltrimethylammonium bromide prepared in Example 1, then use 0.1 mol / L aqueous hydrochloric acid to adjust the pH value of the solution to 3.87, add 100 μL of pure thioethyl Aqueous solution of amides. Thioacetamide hydrolyzate and gold nanoparticles can form stable Au-S chemical bonds on the surface of gold nanoparticles through chemical reaction, and then add 1mL of cadmium chloride aqueous solution with a concentration of 5mmol / L, because cadmium easily forms cadmium sulfide colloid with sulfur (because K sp very small). Therefore, a uniform layer of cadmium sulfide colloid can be formed on the surface of gold nanoparticles, that is, the cadmium sulfide colloid wraps the nano-gold particles inside, forming a core-shell structure with good water solubility and good water solubility. materials (i.e. Au@CdS core-shell materials). At this time, i...

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PUM

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Abstract

The invention discloses a preparation method of a water-soluble material in a core-shell or core-corona-shell structure, which comprises the following steps: (1) using a water-soluble material or a water-soluble material modified by a modifying material as a core material; (2) carrying out physical reaction or chemical reaction on the core material and a chemical reagent A to obtain a core material modified by the chemical reagent A; (3) reacting the core material modified by the chemical reagent A in the step (2) with a metal-cation-containing water solution or reaction reagent B to obtain awater-soluble material in a core-shell structure; and (4) repeating the step (2) and the step (3) by using the material in a core-shell structure in the step (3) as a core material to obtain the water-soluble material in a core-corona-shell structure. The method has the advantages of simple technique and high core-shell yield, and is applicable to the fields of bioanalysis, medical diagnosis and imaging, environmental science, analytic science and the like.

Description

technical field [0001] The invention relates to the field of material preparation methods, in particular to a preparation method of a water-soluble material with a core-shell structure or a core-shell structure. Background technique [0002] Water-soluble materials are widely used in fields such as environmental science, biological analysis, medical detection and biomedical imaging. Among them, water solubility is a prerequisite for the application of materials in the above fields, so whether materials with good water solubility can be prepared is the key to determine whether the above fields can be further developed. Materials with a core-shell structure, referred to as core-shell materials, integrate the dual functional properties of the core material component and the shell material component. The material is incomparable. Taking the nano-gold core-cadmium sulfide shell (Au@CdS) material as an example, the nano-gold component itself is a surface plasmon imaging material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/89C09K11/58C09K11/66C09K11/60C09K11/56C09K11/88C09K11/70
Inventor 吴爱国曾乐勇张付强崔平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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