Anti-aging blue light conversion agent s-triazine derivative and preparation method thereof and prepared agricultural film
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A s-triazine and anti-aging technology, applied in the field of agricultural film, can solve the problems of poor deliquescence resistance and dispersion, decreased mechanical properties of the film, affecting the light transmittance of the film, etc. Effect
Inactive Publication Date: 2018-07-06
TANGSHAN NORMAL UNIV
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Among them, inorganic rare earth fluorescent compounds have high fluorescence intensity, but there are problems of sharp peak emission and poor anti-attenuation performance. The world stock of rare earth metal elements is small and the cost is high; although metal-organic complexes have high luminous intensity and good photostability properties, but metal-organic complexes are not conducive to uniform dispersion into polymer resins, resulting in a decrease in the physical and mechanical properties of the film and affecting the light transmittance of the film; organic fluorescent pigments, such as the sulfide-type light-converting agent that has been reported more at present , although the spectral matching is good, but there are defects of deliquescence resistance and poor dispersion in agricultural film
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Embodiment 1
[0020] Example 1 Preparation of anti-aging blue light conversion agent s-triazine derivative
[0021] (1) Synthesis of 2-methyl-4,6-di-s-triazine (A):
[0022]
[0023] Weigh 2 moles of 1-naphthaldehyde and 1.8 moles of potassium hydroxide, then add 20 L of methanol to dissolve. 5 L of 1,3,5-trimethyl-s-triazine solution dissolved with 1 mole was dropped into the flask drop by drop. The mixture was used as an eluent and separated by silica gel column chromatography to obtain a light yellow powder product with a yield of 40.2%.
[0024] (2) Synthesis of 2,4-bis(1-naphthylethyl)-6-(3,5-di-tert-butyl-4-hydroxyphenethyl) (B)-s-triazine:
[0025]
[0026] Weigh 1 molar amount of 3,5-di-tert-butyl-4-hydroxybenzaldehyde and 1.8 molar amount of potassium hydroxide, then add 20 L of methanol to dissolve. 5 L of 1,3,5-trimethyl-s-triazine solution dissolved in 1 molar amount was dropped dropwise into the flask. After the drop was completed, it was refluxed for another 30 hours,...
Embodiment 2
[0027] The preparation of embodiment 2 agricultural film
[0030] (1) Preparation of light-changing masterbatch: Mix 2 parts of light-changing agent A and 98 parts of EVA-G evenly, and the processing temperature of the twin-screw extruder is 130-190°C. The temperature of the die head is 180° C., the rotational speed of the extruder is 40 r / min, and the pellets are extruded by a twin-screw extruder.
[0031] (2) Preparation of light-converting film Mix 100 parts of the light-converting masterbatch prepared in the above steps with 800 parts of EVA raw material and fully mix them. The blend was blown into a film with a film thickness of 0.05 mm. Get EVA-B light conversion film.
[0032](3) Preparation of control film Mix 100 parts of EVA-G with 800 parts of EVA raw...
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Abstract
The invention relates to an anti-aging blue light conversion agent s-triazine derivative and a preparation method thereof and a prepared agricultural film. The preparation method comprises the following steps: dissolving the s-triazine derivative 2, 4- bis(1-naphthylethyl)-6-(3,5-di-tert-butyl-4-hydroxyphenethyl)-s-triazine adopting a three-branch structure, 1-naphthaldehyde and potassium hydroxide by using methanol; dropwise adding a 1,3,5-trimethyl-s-triazine solution into a container to obtain an intermediate product, and then performing a reaction on the intermediate product, 3, 5-di-tert-butyl-4-hydroxybenzaldehyde and potassium hydroxide to obtain a product. The s-triazine derivative synthesized by the preparation method provided by the invention has good stability and high emitted light intensity; during the preparation of the agricultural film, the s-triazine derivative light conversion agent is uniformly distributed in the film, and the agricultural film has a flat and brightsurface and controllable thickness; after the s-triazine derivative light conversion agent is added into EVA resin, a light conversion film can effectively improve the transmitted light quality, and an organically modified light conversion film has relatively good moisture resistance and attenuation resistance; moreover, the mechanical properties of the agricultural film are effectively improved,the service life thereof is prolonged and the application prospect is good.
Description
technical field [0001] The invention relates to an anti-aging blue light conversion agent s-triazine derivative, a preparation method thereof, and an agricultural film prepared, and belongs to the technical field of fluorescent materials or fluorescent marking materials, and agricultural film light conversion materials. Background technique [0002] Agricultural film is an important agricultural production material after seeds, fertilizers, and pesticides. It has the effect of warming up and preserving moisture in the soil. my country is the country with the largest production and use of agricultural film in the world, which is 1.6 times the sum of all other countries. Agricultural film has made an important contribution to increasing agricultural efficiency and increasing farmers' income. With the improvement of crop cultivation technology, agricultural films with various special functions have appeared one after another. Among them, the light-converting agricultural film i...
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