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Method for preparing luminous Lyocell fibre

A fiber and cellulose technology applied in the field of luminescent Lyocell fibers to achieve high recovery and non-toxic recovery

Inactive Publication Date: 2008-11-05
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few studies on the direct addition of functional materials to Lyocell fibers, and the preparation of luminescent Lyocell fibers by adding rare earth long-lasting materials to cellulose fibers has not been disclosed in relevant literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The rare earth aluminate luminescent material is ground and pulverized, and classified by a 400-mesh sieve to obtain a rare earth aluminate luminescent material powder with an average particle size of 10 μm for use. 1kg of commercially available 50wt% NMMO solvent was dehydrated and distilled, and pre-concentrated to 87wt%. In the concentrated NMMO aqueous solution, add 5g of antioxidant propyl gallate and 7.5g of rare earth aluminate luminescent material, and use 20kHz, 10W ultrasonic dispersion and mechanical stirring at a speed of 300rpm for 20min to obtain a uniformly dispersed and relatively stable suspension . In this step, the above-mentioned multifunctional sonochemical reaction equipment can be used for ultrasonic dispersion and mechanical stirring of materials.

[0025] The suspension was poured into a reaction kettle connected to a spinning machine, and then 75 g of imported cellulose wood pulp was added. Under the condition of 90°C and -0.095MPa vacuum, it...

Embodiment 2

[0030] The rare earth silicate luminescent material was ground and pulverized, dispersed with ethanol, and stabilized for 20 minutes, the supernatant was taken, and the ethanol was evaporated to obtain a rare earth silicate luminescent material powder with an average particle size of 1 μm. Then, 1kg of commercially available 50wt% NMMO solvent was dehydrated and distilled, and pre-concentrated to 87wt%. In the concentrated NMMO aqueous solution, add 0.05g of antioxidant dibutyl toluene, and then add 5g of rare earth silicate luminescent material powder, and disperse with 80kHz, 200W ultrasonic waves and mechanically stir at a speed of 600rpm for 30min to obtain uniform dispersion, relatively stable suspension.

[0031] The above-mentioned suspension was poured into the reactor (connected to the spinning machine), and then 25 g of imported cellulose wood pulp was added. Under vacuum conditions of 120° C. and -0.1 MPa, it was swelled for 1 hour, and then mechanically stirred at...

Embodiment 3

[0035]The rare earth silicate luminescent material is ground and pulverized, and classified with a 500-mesh sieve to obtain a rare earth silicate luminescent material powder with an average particle size of 5 μm for use. Then, 1kg of commercially available 50wt% NMMO solvent was dehydrated and distilled, and pre-concentrated to 95wt%. In the concentrated NMMO aqueous solution, add 0.5g of antioxidant butyl ginsin or propyl gallate and 0.5g of the above-mentioned luminescent material powder, and disperse for 40min by 250kHz, 250W ultrasonic waves and mechanical stirring at a speed of 500rpm to obtain uniform dispersion, more stable suspension.

[0036] Pour the above suspension into the reaction kettle (connected to the spinning machine), then add 50g of imported cellulose wood pulp, swell for 1.5h at 100°C and -0.06MPa vacuum conditions, and then mechanically stir at 600rpm for 8h Dissolving to obtain a uniformly mixed spinning dope.

[0037] Then, at a spinning temperature ...

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Abstract

The invention relates to a luminescent Lyocell fiber preparation method. The method includes the following steps: a rare-earth luminescent material and micro antioxidants occupying 1 to 20 percent of a fibrin pulp weight are added into NMMO water solution, and suspension is obtained after ultrasonic dispersing and mechanical stirring; the suspension and fibrin pulp occupying 5 to 15 percent of the NMMO weight are arranged into a reaction kettle, the mixture is swelled for 0.5 to 5 hours under temperature of 90 to 120 DEG C and a vacuum degree of minus 0.1 to minus 0.06 MPa, and then the mixture is stirred mechanically for dissolving to obtain a spinning stock-solution; then the spinning stock-solution is delivered to a spinning machine to obtain the required fiber through a dry-wet spinning process. The prepared fiber takes the fibrin fiber as a basic material and the fibrin is provided with hydrophilic hydroxide radical which can integrate with the rare-earth luminescent material in the fiber, and the fiber cannot be dropped off after washing with long service life. The solvent of the invention has the advantages to of non-toxicity and high-recycling rate and the fibrin fiber can be degraded without contamination to environment.

Description

technical field [0001] The invention belongs to the technical field of preparation of luminescent fibers, in particular to a method for preparing Lyocell fibers with luminescent properties and the luminescent Lyocell fibers prepared by the method. Background technique [0002] Luminescent fiber is a functional fiber made by adding light-storing material as an additive to the fiber. In addition to the performance characteristics of general fibers, it also has the functions of light absorption-light storage-luminescence. [0003] As early as the mid-1990s, countries and regions such as Japan, South Korea, and Taiwan successively developed luminescent fibers. The preparation process is to add sulfide-based luminescent materials to fiber masterbatches, and produce luminescent fibers through melt spinning. However, due to the low brightness and short afterglow time of the luminescent materials of the sulfide series, the development and application of luminescent fibers are restr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/02D01F1/10D01D1/02C09K11/79C09K11/80
Inventor 唐国翌曹可缪春燕
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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