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MOF (metal-organic framework) composite material as well as preparation method and application thereof

A metal-organic framework and composite material technology, applied in the field of metal-organic framework composite materials, can solve the problems of non-selective regeneration, low adsorption capacity, difficulties, etc., and achieve the effects of mild conditions, improved adsorption, and simple preparation methods

Active Publication Date: 2017-05-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional adsorbents (mainly diatomaceous earth, coke, activated carbon, cellulose, resin, and zeolite) generally have problems such as low adsorption capacity, no selectivity, or difficult regeneration.

Method used

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  • MOF (metal-organic framework) composite material as well as preparation method and application thereof
  • MOF (metal-organic framework) composite material as well as preparation method and application thereof
  • MOF (metal-organic framework) composite material as well as preparation method and application thereof

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preparation example Construction

[0055] The present invention also provides a method for preparing the metal-organic framework composite material, comprising: mixing a polymer material substrate grafted with maleic anhydride, a metal salt, and a carboxyl-containing organic ligand in a solvent, and heating and reacting to obtain a metal Organic framework composite material; the carboxyl-containing organic ligand contains functional groups; the functional groups contain one or more of nitrogen, oxygen and sulfur elements.

[0056] The present invention has no special limitation on the sources of all raw materials, which can be commercially available.

[0057] According to the present invention, the polymer material substrate grafted with maleic anhydride is preferably prepared according to the following method: the polymer material substrate is irradiated to obtain the irradiated polymer material substrate; the maleic anhydride is heated and melted, Add the irradiated polymer material substrate under a protecti...

Embodiment 1

[0080] Take 10g of polyimide (PI) fiber material, wash it with acetone and dry it, put it into a closed container to evacuate it, put it into a radiation source for irradiation, the dose rate is 4kGy / h, and the absorbed dose is 80kGy.

[0081] Add maleic anhydride to a three-necked flask connected with a stirring paddle, and heat to melt it. Use a glass tube to pass through the reaction liquid below the liquid level, and pass through nitrogen. After 15 minutes, the irradiated base material was added into the flask, the reaction was stopped at 90° C. for 4 hours, and the solid product was filtered out. After the product is extracted, washed and dried, the base material of grafted maleic anhydride is obtained.

[0082] Add 2 parts of copper sulfate and 1 part of 1,2,3,5-pyrene tetracarboxylic acid into deionized water, stir and dissolve, then add to the reaction kettle, add the above-mentioned grafted maleic anhydride base material to it, and seal at 90°C Response 3 days. Rep...

Embodiment 2

[0085] Take a polyethylene terephthalate (PET) non-woven fabric with a thickness of 0.65 mm and an area of ​​about 20 × 50 mm, wash it with acetone and dry it, then put it into a closed container, and add a mass fraction of 50% maleic anhydride tetrahydrofuran The solution is submerged in the base material, sealed and placed in a radiation source for irradiation with a dose rate of 3kGy / h and an absorbed dose of 60kGy. The irradiated product is extracted, washed and dried to obtain the base material of grafted maleic anhydride.

[0086] Dissolve 3 parts of zirconium chloride and 2 parts of 2-aminoterephthalic acid in a mixed solution of N,N-dimethylformamide (DMF) and hydrochloric acid (V DMF :V HCl =15:1), stirring and dissolving, adding to the reactor, adding the above-mentioned grafted maleic anhydride base material to it, and sealing at 80°C for 12 hours. Ultrasonic cleaning was performed twice with DMF and ethanol respectively, the material was soaked in ethanol, and fi...

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Abstract

The invention provides an MOF (metal-organic framework) composite material as well as a preparation method and an application thereof. The preparation method comprises steps as follows: a high polymer material substrate grafted with maleic anhydride, metal salt and a carboxyl-containing organic ligand are mixed in a solvent and subjected to a heating reaction, and the MOF composite material is obtained; the carboxyl-containing organic ligand contains a functional group; the functional group contains one or more of nitrogen, oxygen and sulfur. Compared with the prior art, the preparation method is simple, conditions are mild, and the MOF composite material linked with maleic anhydride through chemical bonds cannot be embedded by maleic anhydride homopolymers; besides, the preparation method does not have too many requirements for the metal salt and the carboxyl-containing organic ligand and has quite high regulation and control performance; furthermore, the carboxyl-containing organic ligand is modified with the functional group containing nitrogen, oxygen and sulfur, so that adsorbability of the MOF composite material for heavy metal ions in an aqueous phase is improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a metal organic framework composite material, its preparation method and application. Background technique [0002] Nowadays, heavy metal pollution has become one of the most serious environmental problems, and the situation of heavy metal pollution in China is already very serious. According to the "National Soil Pollution Survey Bulletin" released in 2014, the overall situation of the national soil environment is not optimistic, and soil pollution is relatively serious in some areas. The main type of pollution is inorganic type, and the number of points exceeding the standard of inorganic pollutants accounts for 82.8% of all points exceeding the standard. Among them, the content distribution of cadmium, mercury, arsenic and lead four kinds of inorganic pollutants presents a trend of increasing gradually from northwest to southeast, and from northeast to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/16C08G83/00D06M14/14D06M14/12D06M15/687B01J20/26B01J20/30B01J20/28C02F1/28D06M101/32D06M101/30C08L27/18C02F101/20
CPCB01J20/264B01J20/28023B01J20/28033B01J20/28038B01J20/28066B01J20/28078C02F1/286C02F2101/20C08G83/008C08J7/12C08J7/123C08J7/16C08J2327/18D06M14/12D06M14/14D06M15/687D06M2101/30D06M2101/32
Inventor 邓鹏飏高健柳美华尹园
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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