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Method for preparing magnetic cellulose composite fiber

A technology of composite fibers and cellulose, applied in the field of fibers, can solve the problems of affecting the normal recovery of solvents and coagulants, affecting the physical and chemical properties of fibers, increasing recycling costs, etc., and achieving good functions, method introduction, and health and beauty functions.

Active Publication Date: 2017-02-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mixing suspensions, emulsions and cellulose spinning solutions can improve the dispersion uniformity of functional additives, but additives such as surfactants will enter the coagulation bath, affecting the normal recovery of solvents and coagulants, increasing the cost of recovery
The additives remaining in the fiber will also affect the physical and chemical properties of the fiber, and there is also the possibility of additive leakage during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing magnetic cellulose composite fibers, comprising the steps of:

[0034] Adopting cellulose solvent N-methylmorpholine-N-oxide (NMMO) / water (wherein the proportion that water accounts for is 13.8wt%) dissolving degree of polymerization is 200, and the cellulose acetate of total esterification degree is 2.3, prepares A carrier solution of cobalt oxide with a cellulose acetate concentration of 6 wt% was obtained; then the cobalt oxide and the carrier solution with an average particle size of 0.2 μm were stirred and mixed with a screw extruder, wherein the stirring speed was 100 rpm, and the stirring time was For 0.5 hours, the mass ratio of cellulose acetate to cobalt oxide is 1:1, and the magnetic functional mother liquor is obtained; finally, the magnetic functional mother liquor is injected into the cellulose spinning solution with a polymerization degree of 500 and a concentration of 6wt% in the form of online addition. Specifically, an online add...

Embodiment 2

[0037] A method for preparing magnetic cellulose composite fibers, comprising the steps of:

[0038]Adopt cellulose solvent N-methylmorpholine-N-oxide oxide (NMMO) / water (wherein the proportion that water accounts for is 13.4wt%) dissolving degree of polymerization is 1000, and total esterification degree is the cellulose acetate propionate of 2.5 , the obtained cellulose acetate propionate concentration is the carrier solution of ferric oxide of 15wt%; Then the ferric oxide and the carrier solution with an average particle diameter of 0.38 μm are stirred and mixed by a kneader, wherein the stirring speed is 300 rpm / min, the duration of stirring is 1 hour, the mass ratio of cellulose acetate propionate and ferric oxide is 9:1, and the magnetic functional mother liquor is obtained; finally, the magnetic functional mother liquor is injected into the polymerization degree in the mode of online addition to be 1500, In the cellulose spinning solution with a concentration of 15wt%,...

Embodiment 3

[0041] A method for preparing magnetic cellulose composite fibers, comprising the steps of:

[0042] Adopting cellulose solvent 1-butyl-3-methylimidazolium chloride salt to dissolve polymerization degree is 300, and total esterification degree is 2.4 cellulose acetate butyrate, and the prepared cellulose acetate butyrate concentration is 7wt% trioxide The carrier solution of iron; then the iron ferric oxide and the carrier solution with an average particle size of 0.39 μm are stirred and mixed with a screw extruder, wherein the stirring speed is 200 rpm, and the stirring time is 0.6 hours. Fiber acetate butyrate The mass ratio of element and ferroferric oxide is 10:1, and magnetic functional mother liquor is obtained; Finally, the magnetic functional mother liquor is injected into the cellulose spinning solution with a degree of polymerization of 600 and a concentration of 8wt% in the mode of online addition, specifically: On the cellulose spinning liquid delivery pipeline on ...

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Abstract

The invention relates to a method for preparing a magnetic cellulose composite fiber. The method comprises dissolving a cellulose ester by a cellulose solvent to obtain a carrier solution of magnetic powder, mixing the magnetic powder and the carrier solution by a strong shearing force provided by a stirring device to obtain a magnetic functional mother liquor, injecting a cellulose spinning solution into the magnetic functional mother liquor in the form of on-line addition, and carrying out spinning solution extrusion, solidification, drafting and magnetization to obtain the magnetic cellulose composite fibers. In order to solve the problem that the magnetic powder is difficult to be uniformly mixed with the high-viscosity spinning solution, the cellulose spinning solution is injected into the magnetic functional mother liquor and then the magnetic cellulose composite fibers are prepared through spinning. The mother liquor carrier is molded along with fiber solidification and additional adjuvants do not enter the solvent and coagulation bath system. The forming method of the invention is simple, flexible and efficient, and can realize magnetic cellulose composite fiber production based on a conventional production line.

Description

technical field [0001] The invention relates to the field of fibers, in particular to a preparation method of magnetic cellulose composite fibers. Background technique [0002] Viscose fiber, Lyocell fiber and other regenerated cellulose fibers are chemical fibers formed by wet spinning or dry jet wet spinning from natural cellulose. Regenerated cellulose is widely used in clothing, medical, industrial fabrics and other fields. With the development of regenerated cellulose fiber production technology, functional regenerated cellulose fiber has attracted attention, and magnetic cellulose fiber is one of them. Sun et al. (Magnetite-embedded cellulose fibers prepared from ionic liquid[J].Journal of Materials Chemistry,2008,18(3):283-290.) Fe 3 o 4 The powder was mixed with cellulose / ionic liquid solution, and magnetic cellulose fibers were prepared by dry-jet wet spinning. [0003] Will Fe 3 o 4 When magnetic powder such as powder is mixed with cellulose spinning solution...

Claims

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Application Information

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IPC IPC(8): D01F8/02D01F1/10
CPCD01F1/10D01F8/02
Inventor 王华平张玉梅李建武陈康郝明
Owner DONGHUA UNIV
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