Magnetic polyamide, preparation method thereof and magnetic fibers obtained by using magnetic polyamide

A technology of polyamide fibers and polyamides, applied in the field of preparation of magnetic polyamides and magnetic polyamide fibers

Pending Publication Date: 2020-12-01
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies using flake magnetic particles have not been reported

Method used

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  • Magnetic polyamide, preparation method thereof and magnetic fibers obtained by using magnetic polyamide
  • Magnetic polyamide, preparation method thereof and magnetic fibers obtained by using magnetic polyamide
  • Magnetic polyamide, preparation method thereof and magnetic fibers obtained by using magnetic polyamide

Examples

Experimental program
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Effect test

Embodiment approach

[0040] According to a preferred embodiment of the present invention, the magnetic particles are flaky magnetic particles, preferably composed of ferric oxide, ferric oxide, ferrous oxide, or a mixture thereof.

[0041] In a further preferred embodiment, the flaky magnetic particles are obtained as follows:

[0042] Step a, adding a monovalent metal salt into an alcoholic solvent to form a solution 1;

[0043] Step b, adding iron salt and surfactant into alcohol solvent to form solution 2;

[0044] Step c, adding solution one to solution two and stirring, and then reacting under a protective atmosphere to obtain the flaky magnetic particles.

[0045] In a further preferred embodiment, the magnetic particles are organically modified magnetic particles, preferably organically modified with a coupling agent, and then subjected to post-treatments such as separation and washing, preferably the coupling agent is selected from silane One or more of coupling agents, titanate coupling...

Embodiment 1

[0107] Embodiment 1 Preparation of flaky magnetic particles

[0108] The whole reaction was carried out under nitrogen atmosphere:

[0109] Dissolve 14.4g of sodium acetate in 80mL of ethylene glycol at 50°C to form solution 1;

[0110] Dissolve 5.4g of ferric chloride hexahydrate and 4g of PEG-800 in 70mL of ethylene glycol at 50°C to form solution 2;

[0111] Add solution 1 to solution 2 under stirring and stir for 5 minutes, then stir and react at 180° C. for 52 hours, collect the product, perform centrifugation, wash with deionized water and alcohol three times, and obtain the flaky magnetic particles.

[0112] The flaky magnetic particle that embodiment 1 obtains carries out scanning electron microscope detection, and the result is as follows figure 1 shown, from figure 1 It can be seen from the figure that the obtained magnetic particles are in the shape of flakes, and the upper right illustration is a partially enlarged view, and it can be seen that the thickness o...

Embodiment 2

[0113] Example 2 Organically Modified Flaky Magnetic Particles

[0114] Put 100 g of the flaky magnetic particles prepared in Example 1 into an ethanol solution containing 0.8 g of γ-methacryloxypropyltrimethoxysilane, react at 60° C. for 3 hours, and then separate and wash with ethanol.

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PUM

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Abstract

The invention discloses magnetic polyamide, a preparation method thereof and magnetic fibers obtained by using the magnetic polyamide. The preparation method comprises the following steps: firstly obtaining flaky magnetic particles, then carrying out organic modification on the flaky magnetic particles to obtain organic modified flaky magnetic particles, and then carrying out melt blending on theorganic modified flaky magnetic particles and polyamide or carrying out in-situ polymerization on the organic modified flaky magnetic particles and a polyamide monomer to obtain the magnetic polyamide; meanwhile, carrying out melt spinning on the magnetic polyamide to obtain the magnetic fibers. The magnetic polyamide and the magnetic fibers obtained according to the method have very excellent electromagnetic shielding property and mechanical property.

Description

technical field [0001] The invention relates to the field of magnetic polyamide, in particular to the preparation of magnetic polyamide and magnetic polyamide fiber. Background technique [0002] Magnetic composite materials are widely used in electromagnetic shielding, electronic devices, information storage, sensors, health care and other fields. Magnetic fibers can be used in smart fibers, military protective clothing, etc. At present, there are a lot of research on magnetic fibers, which are generally prepared by melt blending and spinning polymers and magnetic particles, and magnetic particles are also dispersed in the system for in-situ copolymerization. However, most of the magnetic particles used in these magnetic materials are Natural magnetic powder with irregular shape, a small amount of magnetic microspheres used to prepare magnetic fibers. [0003] Among these materials, magnetic particles are used in large amounts. Studies using flake magnetic particles have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K9/06C08K9/04C08K7/00C08K3/22D01F6/90D01F1/10
CPCC08K9/06C08K9/04C08K7/00C08K3/22D01F6/90D01F1/10C08K2003/2272C08K2003/2275C08K2201/01C08L77/02
Inventor 刘继广张启
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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