Difunctional light conversion master batches and preparation method thereof

Abstract

The invention discloses difunctional light conversion master batches which comprise difunctional light conversion agents, modifying agents and organic polymer materials. A constituting general formula of the difunctional light conversion master batches is Ca1-xNxF2:Eu, TM, wherein the x is greater than or equal to 0 and is smaller than or equal to 1, the N is one kind or more kinds selected from Ba, Zn, Sr, Mg, Hg and Fe, and the TM is one kind or more kinds selected from Sm, Cu, Pr, Tb, Ce, La, Dy, Mn and Ag. The difunctional light conversion agents are good in stability, high in luminous intensity, adjustable in blue / red orange light intensity, and capable of being used for production of difunctional light conversion master batches and then for production of difunctional light conversion films. The manufactured difunctional light conversion master batches can carry out pre-dispersion for red light conversion agents, dispersity of the red light conversion agents in film base bodies is improved, dust pollution when on-site operation is carried out is reduced, and thus the manufactured light conversion films have a good light conversion effect. The difunctional light conversion films can convert ultraviolet light (300nm-380nm) and green light (520nm-560nm) in sunlight to strong blue light (400nm-500nm) and red orange light (575nm-630nm) which can promote growth of crops simultaneously.

Description

technical field [0001] The invention relates to a dual-function light conversion masterbatch and a preparation method thereof. Background technique [0002] So far, a large number of research experiments have proved that in the spectrum irradiated on the earth's surface, not all light of different wavelengths is beneficial to plant growth, and there are two peak areas that are really beneficial to plant photosynthesis: (1) blue light area (400 ~500nm), of which the strongest absorption peak of chlorophyll α is 425nm, and the strongest absorption peak of chlorophyll β, lutein and α-carotene is 440nm; (2) red orange region (600-680nm), of which 645nm is the strongest of chlorophyll β Absorption peak, 660nm is the strongest absorption peak of chlorophyll α. By increasing the blue light or red light exposure to plants, the root system of the crops can be developed, the stems and leaves are lush, the yield and income are increased, and the quality is superior. [0003] However,...

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Problems solved by technology

[0003] However, it can be used to manufacture light-changing masterbatches, and can produce the most important material light-changing agent for the growth of crops. Although some progress has been made, most of them focus on monochromatic light-changing agents, such as red light-changing agents. Lighting agents are mainly light-changing agents of rare earth complexes. There are still many problems in the research of this kind of light-changing agents so far: (1) Short fluorescence lifetime

There are very few literatures that report the fluorescence lifetime of organic complex light conversion agents. Even if it is reported, it only works for 3 months. It is used to produce light conversion masterbatches and prepare light conversion films. Soon its light conversion function will decline very quickly, causing it to be unable to synchronize with the life of the membrane

(2) Single optical function

Among the light conversion agents of rare earth organic complexes, only the UV-red conversion function can be used in the light conversion film at present, and there are few reports that can be converted into the blue light required for plant photosynthesis

In addition, in terms of light energy utilization, it can only absorb ultraviolet light, but not green light, which reduces the utilization efficiency of sunlight.

(3) Expensive

Its high price hinders its application in light conversion film; in addition, there are few reports about blue light conversion agents, and existing literature reports that green light and ultraviolet light in sunlight can be converted into blue light and blue light. Red-orange light, but the problem of incompatibility between the light-changing agent and the polymer creates a problem for the practical application of the light-changing agent

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