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A kind of magnetic wave-absorbing fabric and its preparation method and application

A magnetic wave-absorbing and fabric technology, which is applied in textiles and papermaking, can solve the problems of easy agglomeration of wave-absorbing agents, and achieve the effects of reducing microwave absorption loopholes, good impedance matching, and low cost

Active Publication Date: 2021-05-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a magnetic wave-absorbing fabric and its preparation method and application. During the preparation process, the fabric solves the problem that the wave-absorbing agent is easy to agglomerate in the binder, and effectively improves the wave-absorbing performance.

Method used

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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  • A kind of magnetic wave-absorbing fabric and its preparation method and application
  • A kind of magnetic wave-absorbing fabric and its preparation method and application
  • A kind of magnetic wave-absorbing fabric and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Magnetic Fe Using Polyester Fabric as Substrate 3 o 4 / WPU / PET wave-absorbing fabric, the specific steps are as follows:

[0032] (1) Preparation of magnetic WPU absorbing coating

[0033] a. Take 14.63g of IPDI, 12g of PEG400, 50mg of DBTDL and 2.45g of DMPA in a 500mL four-neck flask, and react for 4 hours in an 80°C oil bath, nitrogen atmosphere, condensing reflux, and mechanical stirring;

[0034] b. Cool down to 70°C, add 3.66g end-capping agent HEMA, and continue to react for 3h;

[0035] c. Cool down to room temperature, add 1.64g neutralizing agent TEA to react for 45min, take it out, freeze-dry;

[0036] d. Take 1.21g NH 4 Fe(SO 4 ) 2 12H 2 O and 0.49g (NH 4 ) 2 FeSO 4 ·6H 2 O was dissolved in 100mL of distilled water, and an equal mass of it was added to the WPU prepared above, and emulsified under high-speed shear at 3000r / min for 20min;

[0037] e. Use 25wt% ammonia water to adjust the pH value of the emulsion to 10, and react for ...

Embodiment 2

[0043] Preparation of Magnetic Fe Using Polyester Fabric as Substrate 3 o 4 / WPU / PET wave-absorbing fabric, the specific steps are as follows:

[0044] (1) Preparation of magnetic WPU absorbing coating

[0045] a. Take 14.63g of IPDI, 12g of PEG400, 50mg of DBTDL and 2.45g of DMPA in a 500mL four-neck flask, and react for 4 hours in an 80°C oil bath, nitrogen atmosphere, condensing reflux, and mechanical stirring;

[0046] b. Cool down to 70°C, add 3.66g end-capping agent HEMA, and continue to react for 3h;

[0047] c. Cool down to room temperature, add 1.64g neutralizing agent TEA to react for 45min, take it out, freeze-dry;

[0048] d. Take 2.41g NH 4 Fe(SO 4 ) 2 12H 2 O and 0.98g (NH 4 ) 2 FeSO 4 ·6H 2 O was dissolved in 100mL of distilled water, and an equal mass of it was added to the WPU prepared above, and emulsified under high-speed shear at 3000r / min for 20min;

[0049] e. Use 25wt% ammonia water to adjust the pH value of the emulsion to 10, and react for ...

Embodiment 3

[0055] Preparation of Magnetic Fe Using Polyester Fabric as Substrate 3 o 4 / WPU / PET wave-absorbing fabric, the specific steps are as follows:

[0056] (1) Preparation of magnetic WPU absorbing coating

[0057] a. Take 14.63g of IPDI, 12g of PEG400, 50mg of DBTDL and 2.45g of DMPA in a 500mL four-neck flask, and react for 4 hours in an 80°C oil bath, nitrogen atmosphere, condensing reflux, and mechanical stirring;

[0058] b. Cool down to 70°C, add 3.66g end-capping agent HEMA, and continue to react for 3h;

[0059] c. Cool down to room temperature, add 1.64g neutralizing agent TEA to react for 45min, take it out, freeze-dry;

[0060] d. Take 4.82g NH 4 Fe(SO 4 ) 2 12H 2 O and 1.96g (NH 4 ) 2 FeSO 4 ·6H 2 O was dissolved in 100mL of distilled water, and an equal mass of it was added to the WPU prepared above, and emulsified under high-speed shear at 3000r / min for 20min;

[0061] e. Use 25wt% ammonia water to adjust the pH value of the emulsion to 10, and react for ...

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 relates to a magnetic wave-absorbing fabric and its preparation method and application. First, the magnetic metal ions are evenly dispersed in the ionic water-based polyurethane WPU by electrostatic attraction, and magnetic metal particles are generated in situ under hydrothermal conditions to obtain magnetic WPU wave-absorbing coating; then the coating is grafted on the surface of the mercapto-modified textile through a mercapto-ene click reaction to obtain the final product. The invention solves the problem that the wave-absorbing agent is easy to agglomerate in the binder, and is beneficial to improve the wave-absorbing performance of the wave-absorbing fabric; and then increases the bonding force between the wave-absorbing layer and the fabric through the mercapto-ene click reaction, making it It has practical wearing performance; the prepared magnetic wave-absorbing fabric has high wave-absorbing performance and good impedance matching, which can meet the development requirements of radar stealth materials.

Description

technical field [0001] The invention belongs to the field of functional textiles, in particular to a magnetic wave-absorbing fabric and its preparation method and application. Background technique [0002] In modern warfare, with the rapid development of detection and control technology, advanced detection systems and precision strike systems have posed a non-negligible threat to ground military targets, and this threat is all-round, multi-layered, and deep. features. Therefore, in order to improve the survivability of military targets and the penetration capability of weapon systems, the importance of wave-absorbing materials has become increasingly prominent. The development and application of corresponding technologies are important measures to achieve "stealth" and the key to the development of radar stealth technology. [0003] The function principle of the absorbing material is to lose the incident electromagnetic energy mainly through absorption, so as to avoid the r...

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 Patents(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0036D06N3/0063D06N3/0081D06N3/147D06N2201/042D06N2207/123D06N2209/04
Inventor 王玉俞丹王炜赵凯
Owner DONGHUA UNIV
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