Preparation method of fluorescent submicron particle/complex multicolor fluorescent fibers

A fluorescent fiber and sub-micron technology, applied in fiber processing, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of wide fluorescent color distribution, uneven fluorescent fiber color, easy quenching, etc., and achieve narrow fluorescent color distribution , good stability and size controllable, evenly distributed effect

Inactive Publication Date: 2011-06-15
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, due to the aggregation of quantum dots and other reasons, under the irradiation of ultraviolet light, the fluorescence

Method used

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  • Preparation method of fluorescent submicron particle/complex multicolor fluorescent fibers
  • Preparation method of fluorescent submicron particle/complex multicolor fluorescent fibers
  • Preparation method of fluorescent submicron particle/complex multicolor fluorescent fibers

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specific Embodiment approach 1

[0017] Specific embodiment 1: The preparation method of fluorescent submicron particles / composite colorful fluorescent fibers in this embodiment is realized through the following steps: 1. Mix 100mL ultrapure water, 91.3mgCdCl 2 2.5H 2 0 and 0.0617mL mercaptoacetic acid are added in the three-necked flask, then NaOH solution is added dropwise in the three-necked flask under agitation, until the pH value is 11, then adding 6mL mass concentration is 2% NaHTe aqueous solution to obtain the reaction solution, then Heating to 100°C under nitrogen, reflux for 10min, 1h, 2h, 3h or 4h, to obtain CdTe quantum dot suspension;

[0018] 2. Add 0.25mL tetraethyl orthosilicate, 20.55mL ethanol, 9mLH to the CdTe quantum dot suspension obtained in step 1 2 The concentration of O and 0.2mL is 28% (mass) ammonia water, stirring and reacting for 3-5h to obtain SiO 2 Coated CdTe quantum dot microsphere suspension, and then centrifuged to obtain SiO 2 Coated CdTe quantum dot microspheres;

[0...

specific Embodiment approach 2

[0024] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step two, SiO can also be obtained through the following steps 2 Coated CdTe quantum dot microspheres: Add 3 mL tetraethyl orthosilicate, 25 mL ethanol, 0.5 mL H to the CdTe quantum dot suspension obtained in step 1 2 The concentration of O and 1.5mL is 28% (mass) ammonia water, stirring and reacting for 3-5h to obtain SiO 2 Coated CdTe quantum dot microsphere suspension, and then centrifuged to obtain SiO 2 Coated CdTe quantum dot microspheres. Other steps and parameters are the same as those in Embodiment 1.

[0025] The SiO obtained in Step 2 of this embodiment 2 The particle size range of the coated CdTe quantum dot microsphere is 160-360nm.

[0026] The SiO prepared in Step 2 of this embodiment 2 Scanning electron micrographs of coated CdTe quantum dot microspheres image 3 shown. One of the SiO 2 The transmission electron microscope pictures of the coated...

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step two, SiO can also be obtained through the following steps 2 Coated CdTe quantum dot microspheres: Add 1.3mL tetraethyl orthosilicate, 22.7mL ethanol, 3mL H to the CdTe quantum dot suspension obtained in step 1 2 The concentration of O and 3mL is 28% (mass) ammonia water, stir and react for 3-5h to obtain SiO 2 Coated CdTe quantum dot microsphere suspension, and then centrifuged to obtain SiO 2 Coated CdTe quantum dot microspheres. Other steps and parameters are the same as those in Embodiment 1.

[0028] The SiO obtained in Step 2 of this embodiment 2 The particle size range of the coated CdTe quantum dot microspheres is 1-2 μm.

[0029] The SiO prepared in Step 2 of this embodiment 2 Scanning electron micrographs of coated CdTe quantum dot microspheres Figure 5 shown.

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Abstract

The invention relates to a preparation method of multicolor fluorescent fibers, in particular to a preparation method of fluorescent submicron particle/complex multicolor fluorescent fibers. The preparation method comprises the following steps: preparing CdTe quantum dot suspension from ultrapure water, CdCl2.2.5H20, mercaptoacetic acid and a NaHTe aqueous solution; and then adding tetraethoxysilane, ethanol and ammonia water to prepare SiO2-coated CdTe quantum dot microspheres, mixing the microspheres with polyvinyl alcohol to obtain a spinning solution, and then spinning to obtain the fluorescent submicron particle/complex multicolor fluorescent fibers. The preparation method provided by the invention is simple and economic, and the obtained fluorescent submicron particle/complex multicolor fluorescent fibers have the characteristics of uniformly distributed CdTe quantum dots and no conglobation phenomenon; and the fluorescent fibers are uniform in emitted light colors and narrow in fluorescent color distribution under ultraviolet irradiation, and can emit blue, green, yellow, orange or red fluorescent light under the ultraviolet irradiation.

Description

technical field [0001] The invention relates to a preparation method of colorful fluorescent fibers. Background technique [0002] With the advancement of science and technology, new fluorescent fibers continue to emerge, which have a wide range of applications in photosensitive color-changing materials, fluorescent decorative materials, optical recording materials, light storage fibers, optical fibers, anti-counterfeiting fibers, and optical fibers. Quantum dots have a significant size effect due to the wonderful rules of quantum mechanics. Basically, light above a certain threshold can be absorbed, and an organic dye molecule can only rise from the ground state to a higher excitation after absorbing a photon of appropriate energy. state, the light used must be a precise wavelength or color, which is obviously different from semiconductor bulk materials, while quantum dots must absorb all photons above their bandgap energy, but the emitted light wavelength (ie color) is ver...

Claims

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Application Information

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IPC IPC(8): D01F6/50D01F1/10C09K11/88C09K11/02D01D5/00
Inventor 孙立国汪成谢琛栾羽佳栗春影
Owner HEILONGJIANG UNIV
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