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Dustproof thermal-insulation agricultural film based on super-hydrophobic hydrotalcite and preparation method of dustproof thermal-insulation agricultural film

A super-hydrophobic water and talc technology, applied in the field of agricultural polymer materials, can solve the problems of reducing the service life of agricultural film, hindering the growth of crops, and losing farmers' friends, and achieve the effects of promoting growth, reducing the surface energy of agricultural film, and being easy to operate

Inactive Publication Date: 2019-06-11
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the intensification of air pollution, the dust covered by agricultural film is becoming more and more serious. The dust covered by agricultural film will not only reduce the light transmittance and hinder the growth of crops; The service life will cause economic losses to farmers and friends; it also hinders the further promotion of agricultural film

Method used

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  • Dustproof thermal-insulation agricultural film based on super-hydrophobic hydrotalcite and preparation method of dustproof thermal-insulation agricultural film
  • Dustproof thermal-insulation agricultural film based on super-hydrophobic hydrotalcite and preparation method of dustproof thermal-insulation agricultural film
  • Dustproof thermal-insulation agricultural film based on super-hydrophobic hydrotalcite and preparation method of dustproof thermal-insulation agricultural film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 5g of magnesium-aluminum hydrotalcite to 10mL of deionized water, the amount of high-density PMHS added is 2.5mL, 3mL, 4mL, 5mL, 6mL respectively, bathe in water at 40-60°C for 1-3h, then add KH-550 dropwise, corresponding to PMHS Five dosages, the dosage of KH-550 is 0.625mL, 0.75mL, 0.8mL, 1.25mL, 1.5mL; after the reaction is complete, solidify at 80~120℃ for 1~3h, grind to obtain high-density PMHS modified superhydrophobic hydrotalcite Powder, the particle size distribution is 200nm ~ 1μm.

[0027] The superhydrophobic hydrotalcite is added to the low-density polyethylene agricultural film by the method of internal addition, and the superhydrophobic hydrotalcite is added in an amount of 5%, so as to obtain a high-density PMHS-modified superhydrophobic hydrotalcite dustproof and thermal insulation agricultural film.

Embodiment 2

[0029] Add 5g of zinc-aluminum hydrotalcite to 20mL of deionized water, add high-density PDMS in amounts of 2.5mL, 3mL, 4mL, 5mL, 6mL respectively, bathe in water at 40-60°C for 1-3h, then add KH-550, KH-550 dropwise The dosages are 0.625mL, 0.75mL, 0.8mL, 1.25mL, 1.5mL respectively; after the reaction is complete, solidify at 80-120°C for 1-3 hours, grind to obtain high-density PDMS modified superhydrophobic hydrotalcite powder, and its particle size distribution is 200nm ~ 1μm.

[0030] Select the superhydrophobic hydrotalcite prepared by adding 5 mL of PDMS and 1.25 mL of KH-550, and add the superhydrophobic hydrotalcite to the low-density polyethylene agricultural film by the method of internal addition. 1-5% to obtain a high-density PDMS modified superhydrophobic hydrotalcite dust-proof and heat-retaining agricultural film.

[0031] Such as figure 1 As shown, the upper black line represents the infrared absorption curve of polyethylene agricultural film, compared with t...

Embodiment 3

[0034]Add 5g of zinc-cerium type hydrotalcite to 30mL of deionized water, the amount of FAS added is 2.5mL, 3mL, 4mL, 5mL, 6mL respectively, bathe in water at 40~60℃ for 1~3h, then add KH-550 dropwise, the dosage of KH-550 is respectively 0.625mL, 0.75mL, 0.8mL, 1.25mL, 1.5mL; after the reaction is complete, solidify at 80-120°C for 1-3 hours, and grind to obtain FAS-modified superhydrophobic hydrotalcite powder with a particle size distribution of 200nm-1μm.

[0035] Select the superhydrophobic hydrotalcite prepared by adding 5mL of FAS and 1.25mL of KH-550. The superhydrophobic hydrotalcite is added to the low-density polyethylene agricultural film by the method of internal addition. The addition of superhydrophobic hydrotalcite 1% to 5%, to obtain FAS super-hydrophobic hydrotalcite dust-proof and heat-retaining agricultural film.

[0036] Such as image 3 As shown, as the FAS-modified superhydrophobic hydrotalcite addition increases from 1% to 5%, the contact angle is also...

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Abstract

The invention belongs to the field of agricultural materials, and particularly relates to a dustproof thermal-insulation agricultural film based on super-hydrophobic hydrotalcite and a preparation method of the dustproof thermal-insulation agricultural film. A hydrophobic modifier is grafted to the surface of hydrotalcite, and the hydrotalcite with the hydrophobic modifier is added into an agricultural film by an internal adding method to prepare the dustproof thermal-insulation agricultural film. The hydrophobic modifier can react with hydroxyls on the surface of the hydrotalcite and then isgrafted on the surface of the hydrotalcite. Due to the fact that the modifier has a large amount of-CH3 and other alkyl chains, the hydrotalcite has hydrophobic performance, and due to addition of themodifier, protrusions in different sizes are generated on the surface of the hydrotalcite, so that a secondary roughness structure is constructed, and the hydrotalcite has superhydrophobic performance. According to the method, both chemical modification and physical structure design are adopted, so that double security on the hydrophobicity of the hydrotalcite is achieved. The dustproof thermal-insulation agricultural film is simple to prepare, easy to operate, environment-friendly, pollution-free, capable of effectively preventing dust contamination while thermal insulation is achieved, andwide in application range.

Description

technical field [0001] The invention belongs to the field of agricultural polymer materials, and in particular relates to a dust-proof and heat-retaining agricultural film based on superhydrophobic hydrotalcite and a preparation method thereof. Background technique [0002] In the 1950s, with the development of the petroleum industry and the plastics industry, plastics were widely used in agricultural production. In recent years, the implementation of new technologies such as mulching, greenhouses and water-saving irrigation has increased the demand for plastics in agriculture. Greenhouses ensure the four-season growth of vegetables and flowers has become a widely used technology in modern agriculture. However, with the intensification of air pollution, the dust covered by agricultural film is becoming more and more serious. The dust covered by agricultural film will not only reduce the light transmittance and hinder the growth of crops; The service life causes economic lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/06C08K3/22C08J5/18
Inventor 艾仕云田清源米庆华刘春增郭曼莉刘钦勇
Owner SHANDONG AGRICULTURAL UNIVERSITY