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Three-dimensional structure composite aerogel and preparation method thereof

A technology of composite airgel and three-dimensional structure, which is applied in the field of three-dimensional structure composite airgel and its preparation, can solve the problems of easy oxidation and dispersion of copper nanowires, improve electrical conductivity and mechanical properties, promote dispersion, and inhibit agglomeration Effect

Active Publication Date: 2016-10-12
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention provides a three-dimensional structure composite airgel on the one hand, which solves the problems of easy oxidation and poor dispersion of copper nanowires in the process of chemical reduction co-assembly with graphene oxide

Method used

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  • Three-dimensional structure composite aerogel and preparation method thereof
  • Three-dimensional structure composite aerogel and preparation method thereof
  • Three-dimensional structure composite aerogel and preparation method thereof

Examples

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Embodiment 1

[0045] The preparation method of the copper nanowire-graphene oxide reduction co-assembled three-dimensional structure composite airgel of this embodiment comprises the following steps:

[0046] Weigh 100mg of ascorbic acid in a 20ml glass bottle, add 7.5ml of deionized water, stir to dissolve, add 80mg of copper nanowires and 2.5ml of graphene oxide aqueous solution, the concentration is 8mg / ml, which is the mass of copper nanowires and graphene oxide The ratio is 4:1, ultrasonic 30min, to obtain a mixed solution;

[0047] The above mixed solution was heated to 50° C., kept for 16 hours, and cooled to room temperature to obtain a copper nanowire-graphene three-dimensional structure composite hydrogel. The copper nanowire-graphene three-dimensional structure composite hydrogel was removed from excess water, and then Add deionized water to wash, remove excess water after standing for 12 hours, and repeat several times;

[0048] The washed copper nanowire-graphene three-dimensi...

Embodiment 2

[0051] On the basis of Example 1, the difference between the preparation method of the copper nanowire-graphene co-assembled three-dimensional structure composite airgel of this example and Example 1 is that the quality of the copper nanowire is 40 mg, that is, the copper nanowire and the The mass ratio of graphene oxide is 2:1.

[0052] Other steps of the preparation method of the copper nanowire-graphene co-assembled three-dimensional structure composite airgel in this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0054] On the basis of Example 1, on the basis of Example 1, the preparation method of the copper nanowire-graphene co-assembled three-dimensional structure composite airgel in this example differs from Example 1 in that the quality of the copper nanowires 60 mg, that is, the mass ratio of copper nanowires to graphene oxide is 3:1.

[0055] Other steps of the preparation method of the copper nanowire-graphene co-assembled three-dimensional structure composite airgel in this embodiment are the same as those in Embodiment 1.

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Abstract

The invention provides three-dimensional structure composite aerogel and a preparation method thereof. The three-dimensional structure composite aerogel is formed by ascorbic acid, copper nanowire, oxidized graphene and water, and the mass ratio of the ascorbic acid, the copper nanowire and the oxidized graphene is 2-20: 0.01-200:1. The ascorbic acid is added in mixed solution to effectively restrain oxidation of the copper nanowire in the chemical reduction co-assembly process, and the oxidation problem of the copper nanowire in the chemical reduction co-assembly process with the oxidized grapheme is solved; the diameter of the copper nanowire is small, and the surface energy is strong, so that the copper nanowire easily gathers in aqueous solution. The oxidized graphene, known as surfactant, is equipped with a unique two-dimensional structure and physical properties, and is capable of adsorbing the copper nanowire through the interaction with the copper nanowire, restraining gathering of the copper nanowire, and promoting dispersal of the copper nanowire to solve the problem of dispersal of the copper nanowire.

Description

technical field [0001] The invention relates to the field of three-dimensional structure composite materials, in particular to a three-dimensional structure composite airgel and a preparation method thereof. Background technique [0002] In recent years, due to the good conductivity of copper nanowires (5.96×107Sm -1 ), low cost (Cu: $9kg -1 , Ag: $1000kg -1 ), rich reserves (the content in the earth's crust is 1000 times that of silver), and other advantages have attracted more and more attention, and become the most promising conductive element in the field of smart electronic materials and flexible electronics. However, the problems of easy oxidation and difficult dispersion of copper nanowires limit its application in some aspects. How to prepare high-strength, high-conductivity copper nanowire-based three-dimensional structure materials and apply them in the fields of smart electronic materials and flexible electronics is the current challenge. [0003] In 2010, the...

Claims

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Application Information

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IPC IPC(8): B22F1/00B82Y30/00B82Y40/00
CPCB22F1/0007B82Y30/00B82Y40/00B22F1/0547B22F1/14
Inventor 张国平黄汪平孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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