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Polyurethane foam loaded with metal-organic framework nanocrystals and its preparation and application

A metal-organic framework and polyurethane foam technology, which is applied in the preparation of organic compounds, organic chemistry, and carboxylic acid nitrile preparation, to overcome processing difficulties, have great application prospects, and increase the specific surface area.

Active Publication Date: 2018-08-10
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few studies on the functionalization of polyurethane foam materials, and there is no research report on the composite application of it with MOFs crystals in catalysts.

Method used

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  • Polyurethane foam loaded with metal-organic framework nanocrystals and its preparation and application
  • Polyurethane foam loaded with metal-organic framework nanocrystals and its preparation and application
  • Polyurethane foam loaded with metal-organic framework nanocrystals and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1 Metal Organic Framework UiO-66-NH 2 Synthesis

[0055] Dissolve the organic ligand 2-aminoterephthalic acid, zirconium tetrachloride, and acetic acid in N,N-dimethylformamide solvent, keep the temperature at 120°C for 24 hours, and cool down to room temperature to obtain light yellow nano-sized crystals, centrifuge, Drying; wherein the ratio of organic ligand 2-aminoterephthalic acid, zirconium tetrachloride, acetic acid and N,N-dimethylformamide solvent addition is 0.04mmol: 0.04mmol: 2mmol: 1.6ml, the obtained crystal See in description figure 1 .

Embodiment 2

[0056] Example 2 metal organic framework MIL-101-NH 2 -Synthesis of (Fe)

[0057] The organic ligand 2-aminoterephthalic acid (1.09g, 6mmol) and ferric chloride hexahydrate (1.08g, 4mmol) were dissolved in 20mL DMF, placed in a crystallization axe, and kept at 110°C for 16h. Cool down to room temperature to obtain gray nanoscale crystals, centrifuge, wash with DMF and ethanol in turn, and dry at 120 degrees Celsius for 24 hours to obtain MIL-101-NH 2 -(Fe) crystalline powder, XRD results see figure 2 .

Embodiment 3

[0058] The synthesis of embodiment 3 polyether diol type polyurethane prepolymer

[0059] Add 37g of 4,4-diphenylmethane diisocyanate (MDI) and 63g of PPO (polypropylene oxide) with a molecular weight of 2000 into the reaction vessel in sequence, stir at 80°C, and react at constant temperature for 4 hours, then stop Heating, removing unreacted small molecules by vacuum distillation to obtain a prepolymer with NCO=10-11, viscosity 2000-3000mPa.s, GPC curve see image 3 , see the NMR spectrum Figure 4 .

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Abstract

The invention discloses a polyurethane foam loaded with metal organic framework nanocrystals and its preparation and application. It uses polyurethane prepolymer and active amino groups on MOFs for chemical doping, overcoming the long-term challenge of difficult processing of MOFs materials, and converting MOFs into Nanoparticles are uniformly loaded into polyurethane foam, and a foam reactor is obtained through in-situ molding. This provides a new process for constructing complex mesoporous-microporous assemblies using microporous metal-organic framework nanoparticles as structural units. Its effect on The catalytic effect of Knoevenagel condensation, which uses water as the foaming agent and adopts green chemistry methods to prepare an integral flow-through foam reactor, is used to catalyze organic reactions, simplify the post-processing of the catalyst, avoid the loss of the catalyst, and can Continuous flow-through cyclic catalysis provides new ideas for dealing with environmental pollution and the chemical industry.

Description

technical field [0001] The invention relates to a polyurethane foam reactor loaded with metal-organic framework nanocrystals and its preparation method and application, belonging to the technical field of polymer functional materials. Background technique [0002] Metal-organic frameworks (MOFs) are a new type of porous inorganic-organic hybrid crystalline material, which is composed of metal ions or metal clusters connected with organic ligands through covalent bonds. It exhibits the characteristics of both organic and inorganic materials. High porosity, controllable channels, structural diversity, rich functionality, simple preparation, etc. These unique advantages have attracted widespread attention. MOFs membrane materials have the characteristics of high efficiency, energy saving, economy, etc., and the application range can be extended to liquid and some gaseous media, such as membrane separation, fluorescence sensing, etc., so it has attracted extensive attention. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L87/00C08J9/08C08G83/00C08G18/48C08G18/10B01J31/22C07C253/30C07C255/35
CPCC07C253/30C08G18/10C08G18/4825C08G18/4833C08G83/008C08J9/08C08L75/08B01J31/1691B01J2531/842B01J2531/48B01J2231/4205C08J2203/02C08J2375/08C08L2203/14C08J2487/00B01J35/50B01J35/618C08L87/00C07C255/35
Inventor 姚丙建丁罗刚张功唐孔爽王秀华王新超公莉
Owner SHANDONG NORMAL UNIV
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