Nano red light conversion agent special for agricultural film and preparation thereof

A technology of light conversion agent and red light, which is applied in the field of core-shell structure nano-red light conversion agent, which can solve the problems of reducing the light transmittance of the film, affecting the light transmittance of the film, and reducing the light transmittance of the film.

Inactive Publication Date: 2009-05-20
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Film is a good carrier of light conversion agent. In general production, the production of light conversion film can be completed by slightly adjusting the production process and adding light conversion agent and other plastic additives to the resin masterbatch. If the addition of additives is not well dispersed, it will reduce the light transmittance of the film
In addition, in the production of ordinary agricultural film, the thermal insulation performance of the film is generally improved by adding inorganic powder to the resin as a thermal insulation agent, but the addition of the thermal insulation agent also affects the light transmittance of the film, especially if the particles of the thermal insulation agent are large, It will greatly reduce the light transmittance of the film due to poor dispersion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take the red light conversion agent Eu 0.7 Tb 0.3 (TTA) 3 Phen0.6g, 0.6mmol was dissolved in 50ml dimethyl sulfoxide to obtain solution A; take 0.1g nano-SiO 2 (20nm-30nm), ultrasonically disperse in 50ml ethanol, adjust the pH value of the system to be weakly alkaline at 8.0-12.0, and obtain nano-dispersion system B. (2) In the state of stirring, add solution A dropwise to nano-dispersion system B, continue to stir, and gradually get white turbidity, let it stand for 30-90 minutes, and centrifuge to obtain white solid powder, that is, core-shell red light nanometer Light converting agent SiO 2 @Eu 0.7 Tb 0.3 (TTA) 3 Phen.

Embodiment 2

[0014] Take the red light conversion agent Eu 0.5 Y 0.5 (TTA) 3 Dissolve Phen0.6g, 0.6mmol in 50ml of acetone to obtain solution A; take 0.3g of nano-MgO (20nm-30nm), ultrasonically disperse it in 50ml of n-propanol, and adjust the pH of the system to a weak alkalinity of 8.0-12.0 to obtain a nano-dispersion system b. (2) In the state of stirring, add the solution A dropwise to the nano-dispersion system B, continue to stir, and gradually get white turbidity, let it stand for 30-90 minutes, and centrifuge to obtain a white solid powder, which is the core-shell red light nanometer Light converting agent MgO@Eu 0.5 Y 0.5 (TTA) 3 Phen.

Embodiment 3

[0016] Take the red light conversion agent Eu 0.5 Dy 0.5 (TTA) 3 Phen0.6g, 0.6mmol was dissolved in 50ml N, N-dimethylformamide to obtain solution A, which was subjected to oxygen removal treatment; 0.6g nanometer Cu 2 o 2 (20nm-30nm), ultrasonically disperse in 50ml n-propanol under nitrogen atmosphere, adjust the pH of the system to be weakly alkaline at 8.0-12.0, and obtain nano-dispersion system B. (2) While stirring, under nitrogen protection, add solution A dropwise to nano-dispersion system B, continue to stir, and gradually get white turbidity, let it stand for 30-90 minutes, and centrifuge to obtain white solid powder, which is the core-shell type Red light nano light transfer agent Cu 2 o 2 @Eu 0.5 Dy 0.5 (TTA) 3 Phen.

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Abstract

The invention discloses a nanometer red-light conversion agent specifically used for agricultural films and a preparation method thereof. The light conversion agent is a core-shell-structure composite and a structure thereof can be represented by R@AxB1-xL1L2, wherein, AxB1-xL1L2 is the structure of a shell layer and R is the structure of a core layer. The preparation method comprises the following steps: the red-light conversion agent with suitable amount is taken, and dissolved in solvent S1 with suitable amount so as to obtain solution A; nano-particle R with suitable amount is taken and dispersed in proper solvent S2 by ultrasonic waves, and the pH value of the system is regulated to 8.0 to 12.0 and takes weak alkaline, thereby obtaining a nanometer dispersion system B. Under stirring, the solution A is added in the nanometer dispersion system B by dropping; stirring is continued till obtain white turbid liquid which stands for 30min to 90min, is centrifugally separated and dried so as to obtain the nanometer red-light conversion agent.

Description

technical field [0001] The invention belongs to the field of nanomaterial synthesis, and provides a core-shell structure nanometer red light conversion agent with dual functions of light conversion and heat preservation and a production method thereof. Background technique [0002] Plant growth mainly depends on photosynthesis. The demand of plants for light energy, in addition to light intensity and photoperiod, light quality is a very important factor, which not only affects the photosynthetic efficiency of crops, but also can regulate the content of nutrients in crops. Among the sunlight, red light is the most important to the photosynthesis of plants, followed by blue light; ultraviolet light is easy to promote the aging of plants, induce the occurrence of diseases and insect pests in the soil, and is harmful to plant growth. At the same time, ultraviolet light will cause the aging of plastic films and reduce the service life; other colors The light is mainly converted i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10
Inventor 唐波陈德展崔官伟王茂龙石锡峰董玉明张国英
Owner SHANDONG NORMAL UNIV
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