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Preparation of an ultra-efficient carbon fiber electromagnetic shielding paper

A technology of electromagnetic shielding and effective carbon fiber, which is applied in the direction of magnetic field/electric field shielding, synthetic cellulose/non-cellulose material pulp/paper, non-fiber pulp addition, etc., can solve electromagnetic shielding efficiency, poor mechanical strength and heat resistance, and can not Meet the application requirements of carbon fiber electromagnetic shielding paper, the coating on the surface of the fiber is easy to crack and other problems, and achieve the effect of good messy effect, good electrical conductivity and low reactivity

Active Publication Date: 2018-08-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The patent application with the publication number CN101994275A discloses a new type of multiphase electromagnetic shielding functional paper and its preparation method. It uses undeinked waste paper pulp fibers as the matrix, and carbon fibers and carbon black are dispersed between the fibers to prepare electromagnetic shielding paper. Its electromagnetic shielding effectiveness, mechanical strength and heat resistance are poor
Publication number is that the patent application of CN1456750 discloses the preparation method of carbon paper and metallic carbon paper, proposes to use unprocessed original carbon grain (charcoal, bamboo charcoal, active carbon) and add stainless steel metal fiber, produce carbon paper or carbon paper with paper machine. The method of metallic carbon paper, but its paper strength is not high, and the electromagnetic shielding effect is poor
The patent application with publication number CN103114503A discloses a nickel-plated carbon fiber shielding paper and its preparation method, and proposes a method for preparing nickel-plated carbon fiber to obtain nickel-plated carbon fiber shielding paper, but the process is too complicated, and when the Ni-plated carbon fiber bends, The coating on the fiber surface is easy to crack, which brings a lot of inconvenience to the subsequent process and affects the shielding effect of the paper
Therefore, the existing technology cannot meet the application requirements of carbon fiber electromagnetic shielding paper, and it is necessary to further simplify the preparation process on the basis of taking into account its performance, so as to provide the possibility for subsequent industrialization

Method used

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Embodiment 1

[0034] A preparation of ultra-efficient carbon fiber electromagnetic shielding paper, comprising the following steps:

[0035](1) Activation: pretreat the carbon fibers in 2mol / L NaOH for 2 hours, and use ultrasonic-assisted treatment; the ultrasonic treatment conditions are as follows: temperature is 40°C, ultrasonic frequency is 50kHz, and time is 30min; the treated carbon fibers are taken out and used to Wash with deionized water until neutral, remove the organic coating on the carbon fiber surface, dry and set aside;

[0036] (2) Compounding and additive addition: mix the carbon fiber treated in step (1) with stainless steel fiber, the mixed ingredients are by weight, carbon fiber: stainless steel fiber is 7:3; add the fiber slurry mass to the mixed slurry 0.12% APAM, 1% PVA in fiber slurry mass, stir for 30s;

[0037] (3) wet forming: a certain amount of slurry concentration obtained in step (2) is taken to be 0.09% and carried out in a sheet machine for wet forming, deh...

Embodiment 2

[0040] A preparation of ultra-efficient carbon fiber electromagnetic shielding paper, comprising the following steps:

[0041] (1) Activation: pretreat the carbon fibers in 1mol / L NaOH for 4 hours, and use ultrasonic-assisted treatment; the ultrasonic treatment conditions are as follows: the temperature is 60°C, the ultrasonic frequency is 100kHz, and the time is 10min; the treated carbon fibers are taken out and used to Wash with deionized water until neutral, remove the organic coating on the carbon fiber surface, dry and set aside;

[0042] (2) Compounding and additive addition: mix the carbon fiber treated in step (1) with stainless steel fiber, the mixed ingredients are by weight, carbon fiber: stainless steel fiber is 7:3; add the fiber slurry mass to the mixed slurry 0.5% APAM, 2% PVA of fiber slurry mass, stir for 30s;

[0043] (3) wet forming: a certain amount of slurry concentration obtained in step (2) is taken to be 0.09% and carried out in a sheet machine for wet...

Embodiment 3

[0046] A preparation of ultra-efficient carbon fiber electromagnetic shielding paper, comprising the following steps:

[0047] (1) Activation: pretreat the carbon fibers in 3mol / L NaOH for 1 hour, and use ultrasonic-assisted treatment; the conditions of ultrasonic treatment are as follows: the temperature is 20°C, the ultrasonic frequency is 20kHz, and the time is 60min; the treated carbon fibers are taken out and used to Wash with deionized water until neutral, remove the organic coating on the carbon fiber surface, dry and set aside;

[0048] (2) Compounding and additive addition: mix the carbon fiber treated in step (1) with stainless steel fiber, the mixed ingredients are by weight, carbon fiber: stainless steel fiber is 7:3; add the fiber slurry mass to the mixed slurry 0.6% APAM, 3% PVA of fiber slurry mass, stirring for 30s;

[0049] (3) wet forming: a certain amount of slurry concentration obtained in step (2) is taken to be 0.09% and carried out in a sheet machine fo...

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Abstract

The invention discloses preparation of superefficient carbon fiber electromagnetic shielding paper and belongs to the field of special paper. According to the method, complementary advantages of two fibers, namely carbon fibers and metallic conductive fibers, are innovatively utilized, the defect that the previous single carbon fiber paper-based material is insufficient in toughness is changed, and physical properties and conductivity of the carbon fiber electromagnetic shielding paper are optimized, thereby guaranteeing that the finished paper has good and higher shielding effectiveness and also has good mechanical properties and flexibility; meanwhile, the superefficient carbon fiber electromagnetic shielding paper is wider in applicability and easy to use and has higher conductivity, higher electromagnetic shielding property, better heat resistance and better air permeability, all the indexes are effectively controlled, and the superefficient carbon fiber electromagnetic shielding paper can be cut at will and used.

Description

technical field [0001] The invention relates to the preparation of ultra-high-efficiency carbon fiber electromagnetic shielding paper, which belongs to the field of special paper. Background technique [0002] At present, electromagnetic radiation pollution has become an important pollution in our country and even in the whole world. In recent years, disputes arising from electromagnetic radiation pollution have also frequently occurred. Therefore, how to reduce the pollution caused by electromagnetic radiation has become a hot topic in today's society. The main methods to control electromagnetic radiation pollution include reducing the operating time of electromagnetic radiation facilities and equipment; distance protection and electromagnetic shielding. The main function of electromagnetic shielding is to reduce the electromagnetic field effect in the area that the electromagnetic radiation source can radiate, and prevent the propagation of electromagnetic radiation from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H15/10D21H13/50D21H13/48D21H19/24D21H25/06D21H25/00D21H17/26D21H17/36D21H17/48D21H17/53D21H17/55D21H21/08D21H21/14H05K9/00
CPCD21H13/48D21H13/50D21H15/10D21H17/26D21H17/36D21H17/48D21H17/53D21H17/55D21H19/24D21H21/08D21H21/14D21H25/005D21H25/06H05K9/0081
Inventor 龙柱桑明珠陈乐
Owner JIANGNAN UNIV
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