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Conductive aromatic polyamide fiber with composite metal plating structure

A technology of aromatic polyamide and composite metal, applied in metal material coating process, fiber treatment, fiber type, etc., can solve the problems of electromagnetic shielding, unsuitable for fibrous samples, expensive equipment, etc., and achieves wide application prospects, Flexible designability, effective electromagnetic shielding effect

Active Publication Date: 2020-04-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing problems in the prior art are: in the prior art, the vacuum coating technology is mainly aimed at two-dimensional planar samples, not suitable for fibrous samples, and the equipment is expensive
[0009] In the prior art, the impact of the coating structure design on the shielding performance is not considered, and the conductivity, magnetic permeability, corrosion resistance, durability, economy and light weight of the coating are not taken into account, so the fiber cannot be given a good metallic texture. It also cannot perform more effective electromagnetic shielding, so that the advantages of metallized aramid fiber cannot be used
[0010] It is difficult to solve the above problems

Method used

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  • Conductive aromatic polyamide fiber with composite metal plating structure
  • Conductive aromatic polyamide fiber with composite metal plating structure
  • Conductive aromatic polyamide fiber with composite metal plating structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The preparation method of the conductive aromatic polyamide fiber with composite metal coating structure provided by the embodiment of the present invention includes:

[0091] Step 1: degreasing, put the poly-p-phenylene terephthalamide (PPTA) fiber into 0.01wt% sodium hydroxide solution, ultrasonically clean it at room temperature for 30 minutes, take it out, and rinse it with deionized water.

[0092] The second step: pretreatment, the fiber is immersed in CaCl 2 DMSO solution (CaCl 2 content is 5wt%), soaked at 60°C for 30min, took it out, and rinsed with deionized water.

[0093] The third step: activation, put the pretreated fiber into AgNO 3 DMSO solution (AgNO 3 The concentration is 10g / L) for activation treatment, the temperature is 80°C, take it out after 60min and rinse slowly.

[0094] The fourth step: reduction, put the activated fiber into 1g / L sodium borohydride aqueous solution, carry out reduction treatment at room temperature, take it out after 10 m...

Embodiment 2

[0107] The preparation method of the conductive aromatic polyamide fiber with composite metal coating structure provided by the embodiment of the present invention, the process of the fifth step electroless plating is:

[0108] The fifth step: electroless nickel plating, put the reduced fiber into the electroless nickel plating solution, the formula of the electroless nickel plating solution is: nickel sulfate 10-20g / L, sodium citrate 25-35g / L, sodium hypophosphite 10~15g / L, dimethylaminoborane 2.5~5.0g / L, sodium lauryl sulfate 10mg / L. Use ammonia water to adjust the pH value to 8.0-9.0, plate at 50°C for 30 minutes, and rinse with deionized water.

[0109] Except this step, other processing steps are consistent with embodiment 1.

[0110] Through energy spectrum (EDS) and X-ray photoelectron spectrometer (XPS) analysis, it can be determined that the coating composition obtained by the fifth step of the electroless nickel plating process in this embodiment 2 is a nickel-phosp...

Embodiment 3

[0119] The preparation method of the conductive aromatic polyamide fiber with composite metal coating structure provided by the embodiment of the present invention includes:

[0120] Step 1: degreasing, put the poly-p-phenylene terephthalamide (PPTA) fiber into 0.1wt% sodium hydroxide solution, ultrasonically clean it at room temperature for 10 minutes, take it out, and rinse it with deionized water.

[0121] The second step: pretreatment, the fiber is immersed in CaCl 2 DMF solution (CaCl 2 content is 5wt%), soaked at 100°C for 20min, took it out, and rinsed with deionized water.

[0122] The third step: activation, put the pretreated fiber into AgNO 3 NMP solution (AgNO 3 The concentration is 30g / L) for activation treatment, the temperature is 85°C, take it out after 30min and rinse slowly.

[0123] Step 4: Reduction, put the activated fiber into 2g / L sodium borohydride aqueous solution, carry out reduction treatment at room temperature, take it out after 10 minutes and ...

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Abstract

The invention belongs to the technical field of electromagnetic shielding materials and conductive materials, and discloses a conductive aromatic polyamide fiber with a composite metal plating structure. A chemical nickel-plating or nickel alloy layer is deposited on a substrate of aromatic polyamide synthetic fibers; an electroplated copper metal layer is deposited on the substrate of the chemical nickel-plating or nickel alloy layer; an electroplated nickel metal layer is deposited on the substrate of the electroplated copper metal layer; and an electroplated silver metal layer is selectively deposited or not deposited on the substrate of the electroplated nickel metal layer. The preparation method of the conductive aromatic polyamide fiber with the composite metal plating structure includes the steps of washing and degreasing, pretreatment, activation, reduction, chemical plating, and electroplating. According to the invention, the chemical plating can give the fiber continuous conductivity, and the subsequent electroplating can effectively avoid the shortcomings of the chemical plating, which can improve the production efficiency. The conductive aromatic polyamide fiber prepared by the method has the characteristics of conductivity, light weight, high strength and flame retardancy, and has broad application prospects in the field of electromagnetic shielding.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding materials and conductive materials, in particular to a conductive aromatic polyamide fiber with a composite metal coating structure. Background technique [0002] At present, the closest existing technology: the electromagnetic environment in which modern instruments and equipment are located is becoming increasingly complex, and the research and development of high-efficiency broadband electromagnetic shielding materials has great practical significance for national defense construction and social life. Aramid fiber, referred to as aramid fiber, has at least 85% of the amide bonds directly connected to two aromatic rings in its molecular structure, mainly divided into polyparaphenylene terephthalamide (PPTA, aramid fiber 1414) And poly m-phenylene isophthalamide (PMIA, aramid 1313), and other types include aramid 14, multi-component copolymerized aramid, heterocyclic aramid and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M11/38D06M11/155D06M11/65D06M11/80D06M11/55D06M11/28D06M11/20C23C18/30C23C18/36C25D3/12C25D3/38C25D5/12D06M101/36
CPCD06M11/83D06M11/38D06M11/155D06M11/65D06M11/80D06M11/55D06M11/28D06M11/20C25D3/12C25D3/38C25D5/12C23C18/36C23C18/30D06M2101/36
Inventor 邵勤思傅倩茹李敏娜王莎莎容忠言张久俊白瑞成
Owner SHANGHAI UNIV
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