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Preparation method of semiconductive electromagnetic shielding material
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An electromagnetic shielding material and semi-conductive technology, applied in the manufacture of conductive/antistatic filaments, conjugated synthetic polymer artificial filaments, etc., can solve problems such as easy aggregation, poor performance, and poor spinning and forming effects of nano-carbon fibers
Inactive Publication Date: 2017-11-24
SUZHOU NANER MATERIAL TECH CO LTD
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Problems solved by technology
[0004] High-tech materials such as graphite and nano-carbon fiber have been tested to prove that they have excellent conductivity and radiation resistance, are not subject to external interference, and have achieved the effect of radiation protection and anti-static. However, in the existing technology, graphite is directly dispersed into the fabric. Among the fibers, the dispersion of graphite is not good, and it is easy to aggregate, so the performance is not good. In addition, the spinning and forming effect of pure nano-carbon fiber is poor, which needs to be improved.
Method used
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[0022] Nano-carbon fiber pretreatment, the nano-carbon fiber is oxidized with concentrated sulfuric acid and potassiumpermanganate mixed acid, after ultrasonic vigorous stirring, the carboxylated nano-carbon fiber is obtained, the surface treatment agent is added, heat treatment at 150 ° C for 10 minutes, and silver is added. Under the protection of a mixed gas of nitrogen and helium, heat at 400° C. for 30 minutes to uniformly disperse the silver in the carbon nanofibers.
[0023] Put pretreated graphite and pretreated nano-carbon fiber in a container, dissolve with 150 parts of isopropanol, then add dispersant, polyphenylene sulfide, PPS resin, blend with a strong mixer, and then use an ultrasoni...
Embodiment 2
[0034] Graphite pretreatment, adding sodiumfluoride to the nano-graphite powder, adding a metal catalyst, mixing, heating at 650°C under the protection of an inert gas, and controlling the heating time for 15 minutes, and fixing sodium fluoride on the surface of the nano-graphite powder .
[0035] Nano-carbon fiber pretreatment, the nano-carbon fiber is oxidized with concentrated sulfuric acid and potassiumpermanganate mixed acid, after ultrasonic vigorous stirring, to obtain carboxylated nano-carbon fiber, add surface treatment agent, heat treatment at 200 ° C for 15 minutes, add silver, in Under the protection of a mixed gas of nitrogen and helium, heat at 450° C. for 45 minutes to uniformly disperse the silver in the carbon nanofibers.
[0036] Put pretreated graphite and pretreated nano-carbon fiber in a container, dissolve with 250 parts of isopropanol, then add dispersant, polyphenylene sulfide, PPS resin, blend with a strong mixer, and then use an ultrasonic disperser...
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Abstract
The invention discloses a preparation method of a semiconductive electromagnetic shielding material. In the preparation method disclosed by the invention, a nano carbon conductive fiber material is added into semiconductive shielding material; with the treated graphite with high dispersity and the treated nano carbonfiber, the nano carbon conductive fiber material has a good electromagnetic shielding property and can be easily combined with other materials and has relatively strong physical properties; a good shielding material with smooth surface and small contact hole gap with a conductor is prepared by a specific technology.
Description
technical field [0001] The invention relates to the field of manufacturing electromagnetic shielding materials, in particular to a method for preparing a semiconductive electromagnetic shielding material. Background technique [0002] With the rapid development of the electronic information industry, electrical and electronic equipment has been widely used in all walks of life. While they provide great convenience to people's lives, they also expose serious electromagnetic pollution problems. Relevant studies have confirmed that electromagnetic waves emitted by electronic and electrical equipment will not only interfere with the normal operation of other instruments and equipment, but may also lead to information leakage and even endanger human health. Electromagnetic pollution has become the fourth major public hazard that endangers human existence after noisepollution, air pollution and water pollution. [0003] The semi-conductive shielding material is a semi-conductive...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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