Method for preparing core-shell structure composite material by Gamma-ray irradiation

A technology of composite materials and γ-rays, which is applied in the field of preparation of core-shell structure composite materials, can solve the problems of many steps, inability to remove, and easy introduction of by-products by reducing agents, so as to avoid agglomeration, easy to remove, and improve magnetic properties. Effect

Active Publication Date: 2010-06-16
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects that there are many steps in the preparation of core-shell structure composite materials by the existing electroless plating method, and the defects that by-products are easily introduced and cannot be removed during the reduction process of the reducing agent; Methods for Structuring Nanocomposites

Method used

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  • Method for preparing core-shell structure composite material by Gamma-ray irradiation
  • Method for preparing core-shell structure composite material by Gamma-ray irradiation
  • Method for preparing core-shell structure composite material by Gamma-ray irradiation

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specific Embodiment approach 1

[0018] Specific embodiment one: the method for preparing the core-shell structure composite material by gamma ray irradiation in this embodiment is characterized in that the method for preparing the core-shell structure composite material by gamma ray irradiation is completed by the following steps: 1. Purify nanomaterials or micron materials, then add them to the metal salt solution, then add free radical scavengers, adjust the pH value to 10, and ultrasonically disperse for 30-60 minutes; 60 Co is the γ-ray irradiation of the irradiation source, and the irradiation dose is 1×10 3 ~1×10 5 Gy, radiation dose rate 1~1×10 3 Gy / min, then washed with ammonia water, distilled water and ethanol in turn, then centrifuged, and vacuum dried at 50-80°C for 2 hours to obtain a core-shell structure nano / micro composite material; the nanomaterial or micron material in step 1 The mass ratio to metal ions is 10-1:1.

[0019] In step 1 of this embodiment, 1-10 moles of free radical scaveng...

specific Embodiment approach 2

[0021] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: after vacuum drying in step 2, recrystallization is carried out for 3-8 hours under the condition of 600-800° C. with an inert gas as a protective gas; Core-shell structured nano / microcomposites. Other reaction steps and parameters are the same as in Embodiment 1.

[0022] The inert gas described in this embodiment is nitrogen or argon.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment is different from Embodiment 2 in that: the recrystallization is carried out for 5-7 hours under the condition of 650-750° C. with an inert gas as the protective gas.

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Abstract

The invention relates to a method for preparing a core-shell structure composite material by Gamma-ray irradiation, relating to a preparation method of a core-shell structure composite material. The invention solves the defects of multiple steps, easy side product introduction and difficult scavenging of side products during the reduction of a reducing agent in preparing the core-shell structure composite material by using a traditional chemical plating method. The method comprises the steps of: firstly, purifying nano materials or micron materials, adding into a metal salt solution, then adding a free radical scavenger, adjusting pH value, and ultrasonically dispersing; and secondly, irradiating by using Gamma-rays, washing, centrifugally separating, and drying in vacuum. The method has mild reaction condition, simple operation, strong controllability, good repeatability, less content of purities of products, and stable quality of obtained products.

Description

technical field [0001] The invention relates to a preparation method of a core-shell structure composite material. Background technique [0002] Core-shell structure nano (or micro) composites are a new material with important development prospects in the field of material science and engineering. Due to their unique physical and chemical properties and excellent application performance, they have attracted extensive research interest. [0003] However, the existing electroless plating method to prepare core-shell structure composites has many steps, and the by-products are easily introduced during the reduction process of the reducing agent and cannot be removed. Contents of the invention [0004] The purpose of the present invention is to solve the defects that there are many steps in the preparation of core-shell structure composite materials by the existing electroless plating method, and the defects that by-products are easily introduced during the reduction process o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C04B35/628B22F9/24B22F1/02C23C18/14
Inventor 赵弘韬张丽芳
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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