Supercritical carbon dioxide after-finishing process of wave-absorbing electromagnetic shielding fabric

A carbon dioxide, electromagnetic shielding technology, applied in the fields of magnetic/electric field shielding, electrical components, fiber types, etc., can solve the problems of easy generation of eddy current, easy corrosion, limited physical elasticity, etc., and achieve the effect of short process flow

Active Publication Date: 2021-11-09
SHAANXI YUANFENG TEXTILE TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The embodiment of the present invention provides a supercritical carbon dioxide post-finishing process of wave-absorbing electromagnetic shielding fabrics to solve the problem that traditional electromagnetic shielding fabrics are easy to corrode, easy to oxidize or react with other chemical substances, difficult to process, high density, limited physical elasticity, easy Disadvantages such as eddy current and secondary pollution

Method used

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  • Supercritical carbon dioxide after-finishing process of wave-absorbing electromagnetic shielding fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Fabric pretreatment. The meta-aramid fabric was pretreated with acetone. The treatment temperature is 60°C, the treatment time is 40min, and the drying temperature is 80°C.

[0040] (2) Finishing with supercritical carbon dioxide. take m 1 Gram is placed in high temperature and high pressure reactor through the fabric after step (1) treatment, simultaneously quality is 0.25m 1 gram of composite wave-absorbing nanopowder and 0.05m 1 Grams of the entrainer mixture were placed in the addition kettle. Among them, the composite absorbing powder is composed of graphene, carbon nanotubes, ferrite and MXene-Ti 3 C 2 , the mass ratio of the four is 4:3:2:1. The carbon dioxide in the critical state after heating and pressurizing is passed into the feeding kettle at a flow rate of 20g / min, and it is mixed and dissolved with the composite wave-absorbing nano-powder and the entrainer to form a finishing agent. Under the action of the circulation device, the formed The fi...

Embodiment 2

[0042] Fabric pretreatment. The blended fabric of meta-aramid and flame retardant viscose was pretreated with ethanol. The treatment temperature is 40°C, the treatment time is 60min, and the drying temperature is 60°C.

[0043] Supercritical carbon dioxide finishing. take m 2 The fabric treated by step (1) is placed in a high-temperature and high-pressure reactor, and the quality is 0.15m 2 gram of composite wave-absorbing nanopowder and 0.03m 2 Grams of the entrainer mixture were placed in the addition kettle. Among them, the composite absorbing powder is composed of graphene, carbon nanotubes, ferrite and MXene-Ti 3 C 2 , the mass ratio of the four is 4:3:2:1. The carbon dioxide in the critical state after heating and pressurizing is passed into the feeding kettle at a flow rate of 30g / min, and it is mixed and dissolved with the composite wave-absorbing nano-powder and the entraining agent to form a finishing agent. Under the action of the circulation device, the form...

Embodiment 3

[0045] Fabric pretreatment. The flame-retardant polyester and flame-retardant viscose blended fabric was pretreated with ethanol. The treatment temperature is 50°C, the treatment time is 50min, and the drying temperature is 60°C.

[0046] Supercritical carbon dioxide finishing. take m 3 The fabric treated by step (1) is placed in a high-temperature and high-pressure reactor, and the quality is 0.1m 3 gram of composite wave-absorbing nanopowder and 0.03m 3 Grams of the entrainer mixture were placed in the addition kettle. Among them, the composite absorbing powder is composed of graphene, carbon nanotubes, ferrite and MXene-Ti 3 C 2 , the mass ratio of the four is 4:3:2:1. The carbon dioxide in the critical state after heating and pressurizing is passed into the feeding kettle at a flow rate of 30g / min, and it is mixed and dissolved with the composite wave-absorbing nano-powder and the entraining agent to form a finishing agent. Under the action of the circulation device...

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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Abstract

The invention provides a supercritical carbon dioxide after-finishing process of a wave-absorbing electromagnetic shielding fabric. The finishing method is the supercritical carbon dioxide after-finishing process. The after-finishing process flow is free of water participation, so that the technical problem that composite wave-absorbing powder is difficult to uniformly disperse in a water phase can be solved. The wave-absorbing electromagnetic shielding fabric treated by adopting the after-finishing processing mode has the characteristics of thin thickness, light weight, wide frequency band, strong reflection loss capability and the like, and has flame-retardant and radiation-resistant properties; and the wave-absorbing electromagnetic shielding fabric treated by adopting the supercritical technology can be used for developing various electromagnetic shielding safety protective garments, and is widely applied to civil and military fields.

Description

technical field [0001] The invention relates to the technical field of functional textiles, in particular to an electromagnetic shielding fabric preparation method and a supercritical carbon dioxide finishing process. Background technique [0002] With the development of technologies such as intelligent communication systems, wireless network equipment, and electronic detection equipment, electromagnetic pollution, a new type of invisible, intangible, and inaudible pollution, has begun to involve people's lives and endanger human health. Pollution has been listed as one of the world's public hazards. In order to effectively shield the interference of electromagnetic waves and reduce the harm caused by electromagnetic waves to humans and the environment, it is particularly important to develop efficient electromagnetic shielding fabrics. [0003] The earliest people used the mixed weaving fabric of metal wire and clothing fiber to develop electromagnetic shielding protective...

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/76D06M11/74D06M11/49D06M13/127H05K9/00D06M101/36D06M101/06D06M101/32
CPCD06M11/76D06M11/74D06M11/49D06M13/127H05K9/0083D06M2101/36D06M2101/06D06M2101/32Y02P20/54
Inventor 侯琳徐炎炎刘琳蔡普宁樊争科王超
Owner SHAANXI YUANFENG TEXTILE TECH RES
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