Composite material and preparation method thereof

A technology of composite materials and complexing agents, applied in the field of nanomaterials, can solve problems affecting the mechanical properties of polymer substrates, uneven conductive composite materials, complex preparation processes, etc., and achieve a wide range of size controllable, good electrical conductivity/magnetic permeability Good performance and dispersibility

Active Publication Date: 2017-10-10
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Description
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Problems solved by technology

For example, pure metals with high conductivity such as gold and silver are used as conductive fillers. On the one hand, as gold and silver are expensive metal materials, high filling amounts will inevitably bring high costs, and will also affect the mechanical properties of the polymer substrate; On the one hand, due to the high density of gold and silver, serious sedimentation problems are prone to occur during the compounding process with the polymer solution, resulting in uneven conductive composites and unstable properties.
At present, carbon materials such as carbon nanotubes and graphene, which are in the ascendant, are also widely used as conductive fillers in conductive composite materials, but their application in conductive composite materials is limited due to their large contact resistance, complicated preparation process, and high cost.

Method used

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  • Composite material and preparation method thereof
  • Composite material and preparation method thereof
  • Composite material and preparation method thereof

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preparation example Construction

[0023] A kind of preparation method of composite material is provided in this specific embodiment, comprises the following steps:

[0024] S1, prepare a metal ion solution with a concentration of 0.01-1mol / L, add complexing agent and nucleating agent, and adjust the pH value to 10.0-13.5 with an alkali solution to prepare a solution A. Wherein, the metal ions are magnetic metal ions or a mixture of magnetic metal ions and non-magnetic metal ions.

[0025] In this step, the metal ion solution is preferably a metal salt solution. Wherein, the magnetic metal ions may be one or a mixture of divalent metal ions of nickel, cobalt and iron. The concentration of metal ions is 0.01-1 mol / L. On the one hand, if the concentration is too low, few metal nanowires can be obtained and the yield is low, which is not conducive to application. However, if the concentration is higher than 1mol / L, a large number of metal nanowires will be produced during the reduction process in the subsequent ...

Embodiment 1

[0057] (1) Preparation of metal ion solution (A solution):

[0058] Use water as a solvent to prepare 400mL of solution A at the following concentration, and use alkaline solution to adjust the pH of the solution to 12.5:

[0059] NiCl 2 0.1mol / L

[0060] Na 3 C 6 h 5 o 7 0.05mol / L

[0061] h 2 PtCl 6 0.2×10 -3 mol / L

[0062] (2) Configure strong reducing agent solution (B solution):

[0063] Prepare 400 mL of hydrazine hydrate solution with a concentration of 0.5 mol / L, and use alkaline solution to adjust the pH to 12.5.

[0064] (3) Reduction in solution phase:

[0065] Solution A and solution B were preheated in a water bath at 60°C for 30 minutes respectively, then fully mixed and reacted at 60°C and a stable uniform magnetic field of 0.03T for 20 minutes to prepare a reaction stock solution containing nickel nanowires.

[0066] (4) Post-processing:

[0067] Pour the reacted solution into deionized water for dilution, and then use vacuum filtration to extr...

Embodiment 2

[0070] (1) Preparation of metal ion solution (A solution):

[0071] Use water as a solvent to prepare 400mL of solution A at the following concentration, and use alkaline solution to adjust the pH of the solution to 12.5:

[0072] CoCl 2 0.1mol / L

[0073] h 3 C 6 h 5 o 7 0.05mol / L

[0074] h 2 PtCl 6 0.2×10 -3 mol / L

[0075] (2) Configure strong reducing agent solution (B solution):

[0076] Prepare 400 mL of sodium borohydride solution with a concentration of 0.5 mol / L, and adjust the pH value to 12.5 with alkaline solution.

[0077] (3) Reduction in solution phase:

[0078] Solution A and solution B were preheated in a water bath at 80°C for 30 minutes, then fully mixed and reacted at 80°C and a stable uniform magnetic field of 0.04T for 20 minutes to prepare a reaction stock solution containing cobalt nanowires.

[0079] (4) Post-processing:

[0080] The reacted solution was immediately poured into deionized water for dilution, and then the metal nanowires ...

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Abstract

The invention discloses a composite material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a metal ion solution with a concentration of 0.01 to 1 mol / L, adding a complexing agent and a nucleating agent, regulating a pH value to be 10.0 to 13.5 by virtue of an alkaline solution, and preparing a solution A, wherein the metal ions are magnetic metal ions or a mixture of magnetic metal ions and nonmagnetic metal ions; S2, preparing 0.1 to 3 mol / L of reducing agent solution with strong reducing property, regulating the pH value of the alkaline solution to be 10.0 to 13.5, and preparing a solution B; S3, sufficiently mixing the solution A and the solution B, reacting at 50 to 100 DEG C and under a magnetic field condition of 0.005 to 1T, , ending the reaction before the agglomeration phenomenon, and preparing a reaction stock solution containing magnetic nanowires or alloy nanowires; and S4, compounding the reaction stock solution prepared in step S3 and a polymer. The preparation method is simple in preparation process, and the prepared composite material has the characteristics of excellent performance and low cost.

Description

【Technical field】 [0001] The invention relates to the technical field of nanomaterials, in particular to a composite material and a preparation method thereof. 【Background technique】 [0002] In recent years, with the rise of nanomaterial science and composite materials, the development of functional polymer composite materials has become the mainstream in the field of material technology by utilizing the unique physical properties of nanomaterials and the advantages of processed and low-cost polymer materials. The proportion of functional composite materials will surpass that of structural composite materials and become the mainstream of composite material development. [0003] According to the functional characteristics of another material compounded by the polymer material, the compound material includes conductive compound materials and magnetically permeable compound materials. [0004] Generally speaking, conductive composite materials are usually composed of polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D01F1/09B22F1/00B22F9/24B82Y30/00B82Y40/00D06M101/20D06M101/38
CPCD01F1/09D06M11/83B82Y30/00B82Y40/00B22F9/24D06M2101/38D06M2101/20B22F1/0547B22F1/07
Inventor 杨诚吴铛刘佳惺邹培超
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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