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Preparation method and application of a biodegradable rare earth fluorescent film

A biodegradable, rare-earth fluorescence technology, applied in chemical instruments and methods, luminescent materials, compounds containing Group 3/13 elements of the periodic table, etc., can solve the problems of white pollution, low light energy conversion efficiency, non-degradability, etc. , to achieve the effect of good agricultural value, long red light luminescence performance and good thermal stability

Active Publication Date: 2021-01-26
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of non-degradability, low conversion efficiency of light energy and easy generation of white pollution in current agricultural film materials, and provides a novel method for preparing a biodegradable fluorescent film with high luminous performance and environment-friendly

Method used

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  • Preparation method and application of a biodegradable rare earth fluorescent film
  • Preparation method and application of a biodegradable rare earth fluorescent film
  • Preparation method and application of a biodegradable rare earth fluorescent film

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preparation example Construction

[0041] The invention relates to a preparation method of a biodegradable rare earth fluorescent film, in which a trinuclear rare earth europium complex luminescent material Eu is doped in a PLA matrix. 3 (TTA) 9 -TPMB, obtain the biodegradable rare earth fluorescent film with PLA as matrix; Wherein, PLA and Eu 3 (TTA) 9 -The mass ratio of TPMB is 100:(1~10).

[0042] Wherein, the trinuclear rare earth europium complex luminescent material has a molecular formula of Eu 3 (TTA) 9 -TPMB, prepared by mixing 0.2610g EuTTA 3 2H 2 O was fully dissolved in 30ml of tetrahydrofuran (THF), and 0.1048g of ligand TPMB was added, and the temperature was raised to 75°C with stirring, and after constant temperature reaction for 3 hours, the excess THF was rotary evaporated to obtain the product Eu 3 (TTA) 9 -TPMB. The trinuclear rare earth europium complex luminescent material can also be applied to the fields of biological imaging, sensing, anti-counterfeiting, agricultural film, traf...

Embodiment 1

[0044] The biodegradable rare earth fluorescent film with PLA as the substrate is prepared by the following method:

[0045] 1) Accurately weigh 0.0005g of Eu 3 (TTA) 9 -Add TPMB to the centrifuge tube, then measure 1mL of THF and add it to the beaker, shake until Eu 3 (TTA) 9 - TPMB is completely dissolved.

[0046] 2) Weigh 1g of PLA particles into the beaker, then measure 100mL of chloroform into the beaker, stir until the PLA is completely dissolved, and obtain a 10g / L PLA solution.

[0047] 3) Measure 5ml of PLA solution and add it dropwise to the 3 (TTA) 9 -Put the TPMB solution into a centrifuge tube and put it into an ultrasonic cleaner to make it fully miscible.

[0048] 4) Drop the above-mentioned miscible solution onto the glass slide with a dropper, put it into an evaporating dish, cover the surface with a fresh-keeping film, and allow the solution to slowly evaporate for 12 hours. After the solvent evaporates completely, the complex Eu 3 (TTA) 9 - A biode...

Embodiment 2

[0050] 1) Accurately weigh 0.0015g of Eu 3 (TTA) 9 -Add TPMB to the centrifuge tube, then measure 1mL of THF and add it to the beaker, shake until Eu 3 (TTA) 9 - TPMB is completely dissolved.

[0051] 2) Weigh 1g of PLA particles into the beaker, then measure 100mL of chloroform into the beaker, stir until the PLA is completely dissolved, and obtain a 10g / L PLA solution.

[0052] 3) Measure 5ml of PLA solution and add it dropwise to the 3 (TTA) 9 -Put the TPMB solution into a centrifuge tube and put it into an ultrasonic cleaner to make it fully miscible.

[0053] 4) Drop the above-mentioned miscible solution onto the glass slide with a dropper, put it into an evaporating dish, cover the surface with a fresh-keeping film, and allow the solution to slowly evaporate for 12 hours. After the solvent evaporates completely, the complex Eu 3 (TTA) 9 - A biodegradable rare-earth fluorescent film with a TPMB mass of 3% and a PLA concentration of 10g / L.

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Abstract

The invention discloses a preparation method and application of a biodegradable rare earth fluorescent film, in which a three-nuclear rare earth europium complex luminescent material Eu is doped in a PLA matrix 3 (TTA) 9 ‑TPMB, obtain the biodegradable rare earth fluorescent film with PLA as matrix; Wherein, PLA and Eu 3 (TTA) 9 ‑TPMB mass ratio is 100:(1~10). Doping Eu with PLA as the matrix 3 (TTA) 9 ‑The biodegradable rare earth fluorescent film made of TPMB can be completely degraded, environmentally friendly, green and pollution-free. The biodegradable rare earth fluorescent film also has the advantages of superior luminescence performance and high energy transfer efficiency of trinuclear rare earth europium complex luminescent materials, and europium ions have unique red light luminescence performance, and the wavelength is between 610-640nm, which is beneficial to Plant photosynthesis can help plants produce and has good agricultural value. The preparation process of the biodegradable rare earth fluorescent film is simple, the cost is low, and it is suitable for popularization and use.

Description

technical field [0001] The invention relates to a degradable film material, in particular to a preparation method and application of a biodegradable rare earth fluorescent film. Background technique [0002] Agricultural film is a product used to protect plants from water loss in agricultural production. It has produced huge economic and social benefits since its application. It can increase the yield of crops by 20% to 50%, which greatly promotes agricultural production. development of. The growth of plants is closely related to the light irradiated on the plants: the light needed for photosynthesis of plants has a wavelength of about 400-720nm. Among them, light with a wavelength of 400-520nm (blue) and a wavelength of 610-720nm (red) contribute the most to photosynthesis. Most of the existing agricultural films are transparent. Although the light transmittance is relatively high, they can only passively receive visible light. They cannot provide blue light or red light ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K5/00C08J5/18C07F5/00C09K11/06
CPCC07F5/003C08J5/18C08J2367/04C08K5/0091C09K11/06C09K2211/182
Inventor 杨朝龙张丹贾鹏苏艳高伟宸王中豪张永锋李又兵郑贤王畅刘欣
Owner CHONGQING UNIV OF TECH
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