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Rare earth-based nano-crystalline cellulose fiber film having ultraviolet ray filtering performance and preparation method thereof

A nano-cellulose, filtration performance technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of material damage, low ultraviolet scattering efficiency, etc., to avoid agglomeration, high light transmittance, high ultraviolet light absorption rate Effect

Active Publication Date: 2017-05-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

On the one hand, the existing anti-ultraviolet technology mainly uses the core components in the anti-ultraviolet light to scatter or absorb ultraviolet light and convert it into heat energy through non-radiative transitions. There is damage

Method used

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  • Rare earth-based nano-crystalline cellulose fiber film having ultraviolet ray filtering performance and preparation method thereof
  • Rare earth-based nano-crystalline cellulose fiber film having ultraviolet ray filtering performance and preparation method thereof
  • Rare earth-based nano-crystalline cellulose fiber film having ultraviolet ray filtering performance and preparation method thereof

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preparation example Construction

[0034] The preparation method of the present invention includes the following steps:

[0035] 1. Rare earth complex Eu (TTA) 3 (H 2 O) 2 Synthesis

[0036] According to the molar ratio of 1:3, the inorganic rare earth salt EuCl 3 ·6H 2 O is mixed with 2-thenoyl trifluoroacetone (TTA), then ethanol is added in any proportion, and refluxed at 78-80°C for 3-6 hours. After cooling, filter and volatilize to obtain rare earth complex Eu(TTA) 3 (H 2 O) 2 .

[0037] 2. Preparation of rare earth-based nanocellulose fiber Eu-NFC film

[0038] Ultrasound the nano-cellulose fibers at 400-500W ultrasonic power and 50-60KHz ultrasonic frequency for 10-15 minutes, and then mix with rare earth complex Eu(TTA) 3 (H 2 O) 2 Mix and add ethanol, reflux at 78~80℃ for 3~6h, nano cellulose fiber, Eu(TTA) 3 (H 2 O) 2 The ratio of ethanol to ethanol is (10-33) mg:1 mg: (100-150) mL; the rare earth complex is compounded on nano-cellulose fibers through solvent exchange. After cooling to room temperature, the ...

Embodiment 1

[0041] First, the massage ratio is 1:3, and the inorganic rare earth salt EuCl 3 ·6H 2 O was mixed with 2-thenoyl trifluoroacetone (TTA), then ethanol was added in any proportion, and refluxed at 78°C for 3 hours. After cooling, filter and volatilize to obtain rare earth complex Eu(TTA) 3 (H 2 O) 2 .

[0042] Then the nanocellulose fibers were sonicated for 10 minutes at an ultrasonic power of 400W and an ultrasonic frequency of 50KHz, and then combined with the rare earth complex Eu(TTA) 3 (H 2 O) 2 Mix and add ethanol, reflux for 3h at 78℃, nanocellulose fiber, Eu(TTA) 3 (H 2 O) 2 The ratio of ethanol to ethanol is 10mg:1mg:100mL; the rare earth complex is compounded on nanocellulose fibers through solvent exchange. After cooling to room temperature, vacuum filtration was performed to obtain a rare earth-based nanocellulose fiber Eu-NFC film with a thickness of 0.03 mm.

Embodiment 2

[0044] First, the massage ratio is 1:3, and the inorganic rare earth salt EuCl 3 ·6H 2 O was mixed with 2-thenoyl trifluoroacetone (TTA), then ethanol was added in any proportion, and refluxed at 79°C for 4.5 hours. After cooling, filter and volatilize to obtain rare earth complex Eu(TTA) 3 (H 2 O) 2 .

[0045] Then the nanocellulose fibers were sonicated for 12 minutes at an ultrasonic power of 450W and an ultrasonic frequency of 55KHz, and then combined with the rare earth complex Eu(TTA) 3 (H 2 O) 2 Mix and add ethanol, reflux for 4.5h at 79℃, nanocellulose fiber, Eu(TTA) 3 (H 2 O) 2 The ratio of ethanol to ethanol is 20mg:1mg:120mL; through solvent exchange, the rare earth complex is compounded on nanocellulose fibers. After cooling to room temperature, vacuum filtration was performed to obtain a rare earth-based nanocellulose fiber Eu-NFC film with a thickness of 0.06 mm.

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Abstract

The invention relates to a rare earth-based nano-crystalline cellulose fiber film having ultraviolet ray filtering performance and a preparation method thereof. The method comprises the following steps: nano-crystalline cellulose and a rare earth complex Eu(TTA)3(H2O)2 are mixed according to mass ratio of (10-33):1 and a mixture is added in ethanol, a backflow reaction is carried out; after reaction is completed, cooling and pumping filtration are carried out to obtain the rare earth-based nano-crystalline cellulose fiber film having ultraviolet ray filtering performance. In the preparation method, a rare earth Eu<3+> complex and nano-crystalline cellulose fiber are used to prepare the rare earth-based nano-crystalline cellulose through a solvent exchange method, and the film can be obtained through pumping filtration. The rare earth complex and nano-crystalline cellulose fiber with low cost are composited to the rare earth-based nano-crystalline cellulose fiber film, the prepared film can efficiently transfer the ultraviolet light to red light through radiative transition, and high light transmittance of visible light can be guaranteed.

Description

[0001] 【Technical Field】 [0002] The invention belongs to the field of functional composite materials, and specifically relates to a rare earth-based nano cellulose fiber film with ultraviolet filtering performance and a preparation method thereof. [0003] 【Background technique】 [0004] At present, the main components and mechanism of UV protection can be divided into two categories: The first category is chemical UV protection organic compounds (such as 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxydiphenyl Ketone) and inorganic nanoparticles for physical sun protection (such as ZnO and TiO 2 Nanoparticles), its anti-ultraviolet mechanisms are ultraviolet absorption and ultraviolet reflection. On the one hand, the current existing anti-ultraviolet technology mainly uses the core components of anti-ultraviolet rays to scatter or absorb ultraviolet light and convert it into heat energy through non-radiative transition. However, the scattering efficiency of ultraviolet rays is lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/02C08K5/00C09K3/00
CPCC08J5/18C08J2301/02C08K5/0091C08L2203/16C09K3/00C08L1/02
Inventor 张召李新平薛白亮
Owner SHAANXI UNIV OF SCI & TECH
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