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A kind of environment-friendly light storage film and its preparation method and application

An environment-friendly, light-storage technology, applied in the field of light-transforming functional materials, can solve the problems that agricultural film cannot realize the conversion and storage of light energy, and achieve the effects of prolonging the photosynthesis time of plants, high economic value, and simple preparation process

Active Publication Date: 2020-06-12
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an environment-friendly light storage film, which can store sunlight during the day, and release blue light and red orange that can promote the growth of crops at night or when there is insufficient light. Light (550-800nm), so as to solve the problem that the existing agricultural film cannot realize the conversion and storage of light energy

Method used

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  • A kind of environment-friendly light storage film and its preparation method and application
  • A kind of environment-friendly light storage film and its preparation method and application
  • A kind of environment-friendly light storage film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The following steps are used to prepare an environmentally friendly light storage film, and to evaluate its application in the field of crop planting by studying its luminous properties:

[0036] 1) Weigh 1.82g of PHB into a 50ml beaker, dissolve it in 20ml of chloroform, and prepare a PHB solution with a concentration of 90g / L.

[0037] 2) Add 0.76 g of red long-lasting phosphor SrAI under stirring at room temperature 2 o 4 : Eu, Dy, after stirring relatively uniformly, the resulting mixed solution was ultrasonicated for 15 minutes to obtain a uniform film-forming solution.

[0038] 3) Pour the obtained solution into a glass evaporating dish or a polytetrafluoroethylene dish, and prepare an environmentally friendly PHB red light storage film with a mass fraction of 30% by casting method.

[0039] ƒ From figure 1 It can be seen that the thermal decomposition temperature of the red light PHB light storage film with a doping ratio of 30% is about 325°C, which is more t...

Embodiment 2

[0043] The following steps are used to prepare an environmentally friendly light storage film, and to evaluate its application in the field of crop planting by studying its luminous properties:

[0044] 1) Weigh 1.81g of PHB into a 50ml beaker and dissolve it in 20ml of dichloromethane to prepare a 90g / L PHB solution.

[0045] 2) Add 0.32 g of red-orange long-lasting phosphor Y under stirring at room temperature 2 o2 S:Eu.Mg:Ti, after stirring relatively evenly, the resulting mixed solution was ultrasonically charged for 10 minutes to obtain a uniform film-forming solution.

[0046] 3) Pour the obtained solution into a glass evaporating dish or a polytetrafluoroethylene dish, and prepare an environmentally friendly PHB red-orange light storage film with a mass fraction of 15% by casting method.

[0047] Depend on image 3 It can be seen that the TGA curve of the environmentally friendly PHB red-orange light-storage film with a mass fraction of 15% tends to be horizontal befo...

Embodiment 3

[0051] The following steps are used to prepare an environmentally friendly light storage film, and to evaluate its application in the field of crop planting by studying its luminous properties:

[0052] 1) Weigh 1.8 grams of PHB into a 50ml beaker, dissolve in 10ml of dichloromethane, and prepare a 45g / L PHB solution.

[0053] 2) Add 0.76 g blue light long afterglow phosphor Sr under stirring at room temperature 2 MgSi 2 o 7 , after relatively uniform stirring, the resulting mixed solution was ultrasonicated for 30 minutes to obtain a uniform membrane-forming solution.

[0054] 3) Finally, pour the obtained solution into a glass evaporating dish or a polytetrafluoroethylene tray, and prepare an environmentally friendly PHB blue light storage film with a mass fraction of 30% by casting method.

[0055] Depend on Figure 5 It can be seen that the luminous range of the environmentally friendly PHB blue light storage film with a mass fraction of 30% is 435 to 450nm, and the em...

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Abstract

The invention discloses an environmentally friendly light storage film and its preparation method and use. The environmentally friendly light storage film comprises a biodegradable polymer matrix and long afterglow phosphor according to a mass ratio of (180 to 185): (32 to 78). The light storage film has excellent red, blue or orange long afterglow luminescence performances, can continuously provide blue and red orange light needed by plant photosynthesis at night or in dark for long time so that plant photosynthesis time is prolonged and crop yield and quality are improved. The environmentally friendly light storage film can be naturally degraded and does not produce pollution on the environment. The preparation method comprises completely dissolving biodegradable polymer matrixes PLA, PHB, PHBV and PBS through a good solvent, then mixing 5-50% by mass of inorganic phosphor with various colors and the completely dissolved polymer solution, carrying out uniform ultrasonic dispersion, carrying out curtain coating film formation and carrying out drying to obtain the environmentally friendly light storage film. In the preparation process, chemical reactions are avoided. The preparation method has simple processes and is easy to operate.

Description

technical field [0001] The invention belongs to the field of light-transforming functional materials, and in particular relates to an environment-friendly light-storage film and its preparation method and application. Background technique [0002] At present, white pollution such as plastics is becoming more and more serious, and renewable materials must be developed to replace traditional petrochemical products. Therefore, biodegradable materials are becoming more and more important. PLA, PBS, PHB, and PHBV, as the most widely used biodegradable polymer materials, have broad application prospects. Since they are relatively cheap and biodegradable, they can be used to prepare packaging films and functional materials to solve environmental pollution problems. In addition, because the films prepared by them have good light transmittance, they can be used as the matrix of luminescent materials, and can be combined with other fluorescent substances or luminescent substances to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L67/04C08L81/02C08K3/22C08K3/30C08K3/34
CPCC08J5/18C08J2367/04C08J2381/02C08K3/22C08K3/30C08K3/34C08L2201/06C08L2203/16C08L67/04C08L81/02
Inventor 杨朝龙苏艳李又兵宋冬梅张以王贝
Owner CHONGQING UNIV OF TECH
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