Method for preparing surface silver-plated electric-spinning fiber by using dopamine

A technology of electrospun fiber and dopamine, which is applied in the field of preparing conductive composite materials to achieve the effect of short time consumption, good electrical conductivity, and uniform and dense silver layer

Active Publication Date: 2013-09-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the deficiencies in the existing technology of preparing silver-coated micro-nano composite fibers, and provide a method for preparing silver-coated composite electrospun fibers through dopamine surface modification

Method used

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  • Method for preparing surface silver-plated electric-spinning fiber by using dopamine
  • Method for preparing surface silver-plated electric-spinning fiber by using dopamine
  • Method for preparing surface silver-plated electric-spinning fiber by using dopamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Prepare a 70% TEOS hydrolyzate with a mass fraction of 0.15% hydrochloric acid ethanol solution, stir at a stirring rate of 60 rpm for 12 hours, and use a mixture of DMF and DMSO with a mass ratio of 2:1 as a solvent. PVP with a mass fraction of 16% (W M =1.5 million) solution, the two solutions are mixed and stirred evenly at a stirring rate of 60 rpm, and injected into the syringe;

[0035] 2) figure 1 It is a schematic diagram of the high-voltage electrospinning experimental device, the flat receiver is grounded, and the surface is wrapped with a layer of aluminum foil. The syringe is equipped with a 12-gauge stainless steel needle (the inner diameter is 1mm, and the front end is ground flat) connected to the positive electrode of the high-voltage electrostatic power supply. The distance between the needle and the collecting plate is 20cm , spun at a voltage of 15kV, and collected for a period of time, the micro-nano fiber non-woven film can be obtained. The obt...

Embodiment 2

[0044] The process is the same as in Example 1, but the normal temperature reaction time in step 5 is changed to 30 min, 1 h, 3 h and 4 h, and electrospun silica fibers coated with silver particles on the surface can be obtained.

[0045] It is determined that the silicon dioxide / silver core-shell composite fiber can conduct electricity, and the resistivity is between 0.6-0.02mΩ·cm.

Embodiment 3

[0047] The process is the same as in Example 1, except that the concentration of dopamine in step 3 is changed to 0.5g / L, 1g / L and 4g / L to obtain electrospun silica fibers coated with silver particles on the surface.

[0048] It is determined that the silicon dioxide / silver core-shell composite fiber can conduct electricity, and the resistivity is between 0.6-0.02mΩ·cm.

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Abstract

The invention discloses a method for preparing a surface silver-plated electric-spinning fiber by using dopamine. The method comprises the following steps of: preparing a matrix fiber by using a static electric-spinning method, depositing the dopamine on the surface of the matrix under alkali condition, subsequently putting the matrix which is subjected to surface functionalization by using poly-dopamine into a silver plating liquid, adding a reducing agent glucose solution and preparing the surface silver-plated composite fiber which is good in coating property and conductivity. The method disclosed by the invention is simple to operate and short in time; and the composite material prepared by using the method is good in coating property and conductivity.

Description

technical field [0001] The invention belongs to the field of preparing conductive composite materials, in particular to a method for reducing silver on the surface of fibrous materials of various sizes, and in particular to a method for preparing surface silver-plated composite electrospun fibers by functionalizing the surface of dopamine in the presence of a reducing agent . Background technique [0002] Matrix / metal composite materials are important raw materials for the electronics industry and defense industry. The matrix / metal composite material is a core-shell composite material whose core is polymer ceramics and other non-metals or other metals, and the surface is metal. It can endow the matrix with special electrical, magnetic, optical properties, as well as anti-oxidation and aging resistance. It also improves the wettability of powders to metals. Compared with granular materials, fibrous materials can greatly reduce the percolation threshold of fillers, reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/44D06Q1/04
Inventor 王文才张立群付烨田明刘力温世鹏邹华
Owner BEIJING UNIV OF CHEM TECH
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