Preparation method of composite material, composite material and application thereof

A technology of composite materials and polymers, which is applied in the field of preparation of organic porous polymer composite materials, can solve the problems of reducing the resistance of precursor solution, the difficulty of combining MOFs and loading materials, and uneven spreading, so as to improve the mass transfer rate and The effect of adsorption efficiency, fast adsorption rate and easy molding

Active Publication Date: 2022-07-19
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of difficulty in compounding MOFs and loading materials and uneven spreading, the present invention uses an internal multi-level pore structure interconnected with well-developed pores, and a polyacrylamide material mainly with a macroporous structure to compound with MOFs to reduce the diffusion of the precursor solution into the resistance inside the particle

Method used

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  • Preparation method of composite material, composite material and application thereof
  • Preparation method of composite material, composite material and application thereof
  • Preparation method of composite material, composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Accurately weigh 1.6 g of acrylamide, 0.4 g of N,N-methylenebisacrylamide, 0.1 g of Poloxamer F127, and 0.03 g of ammonium persulfate, dissolved in 5 ml of deionized water, and ultrasonicated for 5 min to obtain the aqueous phase; 11ml of toluene and 5ml of cyclohexane were mixed uniformly to obtain the oil phase; the water phase was uniformly stirred at a rotational speed of 3000r / min, the oil phase was added to the water phase, and the stirring was continued for 5 minutes to finally form a uniform and stable emulsion. Measure 15ml of toluene, 15ml of carbon tetrachloride, and 60ml of cyclohexane, add 0.15g of ethyl cellulose and mix them uniformly as the third phase, pour the emulsion into the third phase under nitrogen protection, and rotate at 350r / min. Then, 14 drops of reducing agent N,N,N',N'-tetramethylethylenediamine were added, and cross-linking polymerization was carried out at 65°C for 30min. After solidification, the balls were taken out and washed with eth...

Embodiment 2

[0036] The preparation process of polyacrylamide particles is the same as that of Example 1. Accurately weigh 2.1 g of metal salt zirconium chloride, measure 7.5 ml of acetic acid, dissolve it in 15 ml of N,N-dimethylformamide by ultrasonic to obtain solution A, then weigh 1.1 g of fumaric acid, and measure 1.0 ml of trisulfuric acid. Ethylamine was ultrasonically dissolved in 15ml of N,N-dimethylformamide to obtain B solution, and then A solution and B solution were ultrasonically mixed to obtain a precursor solution, which was poured into 0.3 g of dried polypropylene In the flask of amide particles, the flask was reacted in an oil bath at 85 °C for 24 h, and MOFs particles were grown on the macropore surface of the porous polymer. After washing and drying at 150 °C for 24 h, the MOFs / polyacrylamide composite material was obtained.

[0037] The scanning electron microscope image of the internal pore structure of the MOFs / polyacrylamide composite prepared in this example is sh...

Embodiment 3

[0039] The preparation process of polyacrylamide particles is the same as that of Example 1. Accurately weigh 2.1g of metal salt zirconium chloride, measure 15ml of acetic acid, dissolve it in 15ml of N,N-dimethylformamide by ultrasonic to obtain solution A, then weigh 1.1g of fumaric acid and measure 2.0ml of trimethylamine Ultrasonic dissolving in 15ml N,N-dimethylformamide to obtain B solution, then ultrasonically mixing A solution and B solution to obtain a precursor solution, which was poured into 0.3g dried polyacrylamide particles The flask was reacted in an oil bath at 100 °C for 24 h, and MOFs particles were grown on the macroporous surface of the porous polymer. After washing, the solvent was removed in a vacuum drying oven for 24 h for activation to obtain MOFs / polyacrylamide composite material. .

[0040] The scanning electron microscope image of the internal pore structure of the MOFs / polyacrylamide composite prepared in this example is shown in Figure 5 , it c...

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Abstract

The invention discloses a preparation method, product and application of a composite material. The method impregnates a precursor solution into polymer particles, realizes the in-situ loading of MOFs in one-time molding, and adjusts the concentration and addition of metal salts and organic ligands. The structure of porous composites can be designed by means of regulators, and the crystal size of MOFs can be controlled. The composite material prepared by this method can take advantage of the spatial structure of the polyacrylamide material with interconnected hierarchical pore structure, combined with the active amino groups on the pore wall, to realize the uniform spreading of the nano-MOFs layer, and greatly improve the transmission of the material in the water vapor trapping. The mass rate and adsorption efficiency can be applied to water vapor capture in different humidity environments. The method has the advantages of simple preparation method, easy molding and high mechanical strength, and is suitable for industrial production.

Description

technical field [0001] The invention relates to an inorganic-organic composite material, in particular to a preparation method of an organic porous polymer composite material loaded with MOFs, the composite material and its application. Background technique [0002] Water scarcity is one of the most challenging problems threatening human life. Two-thirds of the world's population lives with water scarcity for at least one month of the year. To make matters worse, half a billion people on Earth face severe water shortages every year. The atmosphere retains 12.9 trillion tons of fresh water, equivalent to 10% of all lakes on Earth, and is a very valuable natural resource. Given the rapid population growth, general scarcity of clean water, and water pollution, harvesting atmospheric water to produce fresh water is emerging as an alternative and promising method, especially in arid regions. There are various methods of collecting air water, for example, mist collection, refri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/26C08L87/00B01J20/26B01D53/26B01J20/30C08G83/00C08F220/56C08F222/38C08J9/40
CPCC08L33/26B01J20/265B01D53/261C08G83/008C08F220/56C08J9/405B01D2257/80C08J2333/26C08L87/00C08F222/385
Inventor 密建国孟洪金君素朱吉钦杜智霖
Owner BEIJING UNIV OF CHEM TECH
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