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A preparation method of amorphous and nanocrystalline improved polyester self-cleaning shielding fiber

An amorphous nanocrystalline, self-cleaning technology, applied in the chemical characteristics of fibers, rayon manufacturing, conductive/antistatic filament manufacturing, etc., can solve the problems of decreased shielding performance, low shielding performance, loss of mechanical properties of materials, etc. Achieve high reliability, high shielding, and low cost

Active Publication Date: 2015-11-25
XUZHOU SILK FIBER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material prepared by the blending method has the advantages of low cost, long life, high reliability, etc., but the shielding performance is not high, especially at high frequencies, the shielding performance will decrease
And increasing the amount of filler will lose the mechanical properties of the material
Functional nano powder has small size and good thermal stability when spinning at high temperature, but the electromagnetic wave protection is obviously insufficient

Method used

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  • A preparation method of amorphous and nanocrystalline improved polyester self-cleaning shielding fiber
  • A preparation method of amorphous and nanocrystalline improved polyester self-cleaning shielding fiber
  • A preparation method of amorphous and nanocrystalline improved polyester self-cleaning shielding fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 (eg Figure 1-5 ):

[0044] (1) Pretreatment of selected raw materials

[0045] a) Untreated carbon nanotubes (CNTs) were added to HNO at a volume ratio of 3:1 3 (concentrated) with H 2 SO 4 (concentrated) mixed acid, ultrasonically oscillated at 80°C for 30 minutes, then heated in a water bath at 80°C for 30 minutes, filtered and washed to pH 7, dried at 100°C for 4 hours (hours) to obtain purified CNTs;

[0046] b) Treat purified CNTs, amorphous nano-FeCo powder (50nm), and nano-silver (50nm) with coupling agent KH560 (or titanate coupling agent, the effect is the same) with a mass fraction of 1% respectively, that is, the coupling agent Spray on the amorphous nanocrystalline nano functional powder, stir and mix, and then dry at 80°C for more than 4 hours;

[0047] c) Polyester pre-crystallized at 140°C for 1 hour, and then dried at 160°C for more than 4 hours.

[0048] (2) Preparation of functional fibers

[0049] a) Dry polyester polyester and amorp...

Embodiment 2

[0054] (1) Pretreatment of raw materials

[0055] With embodiment 1.

[0056] (2) Preparation of functional fibers

[0057] a) with embodiment 1.

[0058] b) Polyester polyester chips are mixed with the pulverized and screened functional masterbatch at a mass ratio of 10:90, and after drying, a twin-screw extruder is used to make a spinning masterbatch.

[0059] c) with embodiment 1.

[0060] The obtained fineness is 132.69Dtex; the strength is 1.46% higher than that of the pure sample; the microwave shielding efficiency of the fiber fabric reaches 25dB; except for the strong absorption of 10Abs / mm in the ultraviolet to visible light region 300-800nm, the entire infrared region has 7.5Abs / mm absorb.

Embodiment 3

[0062] (1) Pretreatment of raw materials

[0063] With embodiment 1.

[0064] (2) Preparation of functional fibers

[0065] a) with embodiment 1.

[0066] b) Polyester polyester chips are mixed with the pulverized and sieved functional masterbatch in a ratio of 30:70, and the others are the same as in Example 1.

[0067] c) with embodiment 1.

[0068] The obtained fineness is 54.50Dtex; the strength is 107% higher than that of the pure sample; the microwave shielding efficiency of fiber textiles reaches 15dB; except for the strong absorption of 20Abs / mm in the ultraviolet to visible light region of 300-800nm, the entire infrared region has an absorption of 15Abs / mm .

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Abstract

The invention provides a method for preparing amorphous and nanocrystalline improved polyester self-cleaning shielding fibers, which mainly includes selecting polyester chips with good spinnability as spinning substrates, and selecting amorphous and nanocrystalline nano functional powders as functional additives, wherein the functional The additives are selected from CNTs (mass fraction 0.05%~8%) that can improve electrical conductivity and mechanical properties, one or all of magnetic nanoparticles FeCo, Fe3O4 (0.05%~12%), spinning matrix and functional Additive blending, melt spinning and other processes. The fiber obtained by the invention can achieve the uniform dispersion and spinnability of the nano-additive, and at the same time has the synergistic effect of improving the mechanical properties, increasing the antibacterial properties and electromagnetic shielding properties of the polyester polyester.

Description

technical field [0001] The invention relates to a method for preparing amorphous and nanocrystalline modified polyester. The fiber obtained by the method has the functions of self-cleaning and electromagnetic shielding. Background technique [0002] With the development of modern high-tech and the use of various household appliances, electronic equipment, office automation equipment, radar, television broadcasting and other electrical devices, electromagnetic radiation has become an invisible public hazard. Electromagnetic interference not only interferes with electrical equipment, but also poses a serious threat to human health. From the 1990s to the present, countries all over the world are scrambling to study new electromagnetic shielding materials, especially the development and development of electromagnetic shielding fibers, and have made some progress. [0003] The first generation of shielding fiber is made of metal fiber, which is blended (knitted) with metal wire ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01F1/09C08J3/22C08L67/00C08K9/06C08K9/04C08K9/02C08K7/00C08K3/04C08K3/22C08K3/08
Inventor 孙德荣李帅宋玉军
Owner XUZHOU SILK FIBER TECH
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