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Method for preparing fluorescent anti-counterfeiting Lyocell fibers

A fluorescent and fiber technology, which is applied in the field of anti-counterfeit chemical fiber preparation, can solve the problems of destroying fluorescent properties, and achieve the effect of expanding application fields, good fluorescent anti-counterfeiting effect, and simple process

Inactive Publication Date: 2014-07-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a preparation method of fluorescent anti-counterfeiting Lyocell fiber. The problem of high-temperature melt spinning destroying fluorescent properties; and the source of cellulose used is widely renewable, without dependence on petroleum resources

Method used

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  • Method for preparing fluorescent anti-counterfeiting Lyocell fibers
  • Method for preparing fluorescent anti-counterfeiting Lyocell fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Weigh 10g heterocyclic phenol fluorescent substance (structural formula: );

[0038](2) 4085g water content is the NMMO aqueous solution of 50% (mass percentage) to carry out vacuum distillation to obtain 2760g water content is the NMMO aqueous solution of 26% (mass percentage);

[0039] (3) Disperse the fluorescent substance obtained in step (1) into the NMMO aqueous solution obtained in step (2), ultrasonically treat it for 30 minutes, and then magnetically stir for 2 hours, so that the fluorescent substance is uniformly dispersed in the NMMO aqueous solution to form a suspension;

[0040] (4) Add 205g of cellulose cotton pulp and the suspension obtained in step (3) into the dissolving device. Stirring at 90°C and distilling under reduced pressure to remove water, to generate a ternary system of fluorescent substance / cellulose / NMMO aqueous solution with a water content of 13%, that is, fluorescent Lyocell spinning stock solution;

[0041] (5) Dry-wet spinning t...

Embodiment 2

[0043] (1) Mix 10g inorganic fluorescent substance (main components: ZnS:Cn, Mn) and 25g glycerol (mass ratio 1:2.5), then add 0.1g titanate coupling agent and 0.6g glycerol The mixed solution (mass ratio 1:6), the coupling agent is evenly dispersed on the surface of the fluorescent powder by magnetic stirring, and the pretreated fluorescent substance is obtained after evaporating glycerol;

[0044] (2) 4085g water content is the NMMO aqueous solution of 50% (mass percentage) to carry out vacuum distillation to obtain 2760g water content is the NMMO aqueous solution of 26% (mass percentage);

[0045] (3) Disperse the fluorescent substance obtained in step (1) into the NMMO aqueous solution obtained in step (2), ultrasonically treat it for 30 minutes, and then magnetically stir for 2 hours, so that the fluorescent substance is uniformly dispersed in the NMMO aqueous solution to form a suspension;

[0046] (4) Add 205g of cellulose cotton pulp and the suspension obtained in step...

Embodiment 3

[0049] (1) 25g of long-wave anti-counterfeiting fluorescent substance (main component: Y 2 o 2 S; EuZnAg) and 25g short-wave fluorescent substance (main component: CaY 0.8 Tb 0.1 AlO 4 ). Stir and dry in a high-speed mixer preheated to 80-90°C, then evenly add 0.5g of titanate coupling agent (diluted with an appropriate amount of ethanol), and stir for 10 minutes to obtain a mixed fluorescent substance;

[0050] (2) 2960g water content is 50% (mass percentage) NMMO aqueous solution is carried out underpressure distillation to obtain 2000g water content is the NMMO aqueous solution of 26% (mass percentage);

[0051] (3) Dispersing 4 g of the mixed fluorescent substance obtained in step (1) into the NMMO aqueous solution obtained in step (2), ultrasonically treating for 1 hour, and then magnetically stirring for 4 hours, so that the fluorescent substance is uniformly dispersed in the NMMO aqueous solution to form a suspension;

[0052] (4) 160g of cellulose wood pulp step (...

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Abstract

The invention relates to a method for preparing fluorescent anti-counterfeiting Lyocell fibers. The method comprises the following steps of: (1) uniformly dispersing a fluorescent substance in an aqueous solution of NMMO with water content of 20-40 percent to obtain a turbid liquid; (2) adding cellulose pulp and the turbid liquid in a mass ratio of 5-20:100 into a dissolver, stirring at the temperature of between 70 and 120DEG C, and distilling under reduced pressure to remove water so as to obtain a fluorescent substance / cellulose / aqueous solution of NMMO ternary mixing system, namely a fluorescent Lyocell spinning solution; and (3) regulating the temperature of the fluorescent Lyocell spinning solution to be 85-120DEG C, and performing dry-wet spinning to obtain the fluorescent anti-counterfeiting Lyocell fibers. The method is environment-friendly and simple; and the fluorescent anti-counterfeiting Lyocell fibers have ultraviolet, infrared and dual wavelength anti-counterfeiting functions.

Description

technical field [0001] The invention belongs to the field of preparation of anti-counterfeiting chemical fibers, in particular to a preparation method of fluorescent anti-counterfeiting Lyocell fibers. Background technique [0002] Fluorescent anti-counterfeiting fiber, also known as safety fiber, can be divided into infrared fluorescent anti-counterfeiting fiber and ultraviolet fluorescent anti-counterfeiting fiber. Infrared fluorescent anti-counterfeiting fiber refers to a new type of anti-counterfeiting fiber that can emit a variety of different colors (red, blue, green, yellow-green) under the excitation of infrared light. Ultraviolet fluorescent fiber refers to the fiber that shimmers under the excitation of ultraviolet light and can emit various colors. When the ultraviolet light disappears, it can return to the original color of the fiber. It is divided into long-wavelength (365nm) fluorescent fibers and short-wavelength (254nm) fluorescent fibers, and can also be di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/00D01F1/10
Inventor 张慧慧陈超邵惠丽杨革生胡学超
Owner DONGHUA UNIV
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