Preparation method of magnetic seaweed fiber
A seaweed fiber and magnetic technology, which is applied in the direction of fiber chemical characteristics, rayon manufacturing, alginate artificial filament, etc., can solve the problems of easy shedding of magnetic particles and rare magnetic fibers, and achieve uniform strength and magnetization , to avoid the effect of magnetic agglomeration
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Embodiment 1
[0032] The preparation method of magnetic seaweed fiber of the present invention specifically comprises the following steps:
[0033] The first step is to prepare superparamagnetic iron tetroxide nanoparticles with sulfonic acid groups on the surface, magnetic separation, water washing, and vacuum drying to obtain black powder, and 0.1 g is added to 1 mL of deionized water for ultrasonic dispersion to obtain the dispersion of iron tetroxide nanoparticles. liquid;
[0034] The second step, take 26.316g sodium alginate powder, dissolve it with 500mL deionized water, add ferric oxide nanoparticle dispersion, stir and mix evenly, the sulfonic acid group on the surface of the nanoparticle in the solution and the carboxylic acid group of sodium alginate There is electrostatic repulsion between them, and the spinning solution is obtained after further filtration and vacuum defoaming;
[0035] In the third step, the spinning solution is coagulated in an aqueous solution of calcium ch...
Embodiment 2
[0040] The preparation method of magnetic seaweed fiber of the present invention specifically comprises the following steps:
[0041] The first step is to prepare superparamagnetic ferric oxide nanoparticles with carboxyl groups on the surface, centrifugally wash and then vacuum dry to obtain brown powder, take 5 g and add 50 mL of deionized water to ultrasonically disperse to obtain a dispersion of ferric oxide nanoparticles;
[0042] The second step, take 100g of sodium alginate powder, dissolve it with 2000mL of deionized water, add ferric tetroxide nanoparticle dispersion, stir and mix evenly. For electrostatic repulsion, the spinning solution is obtained after further filtration and vacuum defoaming;
[0043] In the third step, the spinning solution is coagulated in an aqueous solution of calcium chloride with a mass fraction of 5% at room temperature through a spinneret through a wet spinning machine to obtain primary fibers;
[0044] In the fourth step, the primary fib...
Embodiment 3
[0047] The preparation method of magnetic seaweed fiber of the present invention specifically comprises the following steps:
[0048] The first step is to prepare superparamagnetic iron tetroxide nanoparticles with sulfate groups on the surface. After centrifugal washing, vacuum drying is performed to obtain a brown powder, and 0.1 g is added to 1 mL of deionized water for ultrasonic dispersion to obtain a dispersion liquid of iron tetroxide nanoparticles. ;
[0049]The second step, take 26.316g sodium alginate powder, dissolve it with 500mL deionized water, add ferric oxide nanoparticle dispersion, stir and mix evenly, the carboxyl group on the surface of the nanoparticle in the solution and the carboxylic acid group of sodium alginate are between It is shown as electrostatic repulsion, and the spinning solution is obtained after further filtration and vacuum defoaming;
[0050] In the third step, the spinning solution is coagulated in an aqueous solution of calcium chloride...
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Abstract
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