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
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[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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