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Super-hydrophobic metal-organic framework array, as well as preparation method and application thereof

A metal-organic framework, super-hydrophobic technology, used in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problem of less design of other structures, and achieve the effects of excellent hydrophobicity, high separation efficiency and reusability

Active Publication Date: 2017-09-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many superhydrophobic MOF materials have been prepared, but these superhydrophobic MOFs are concentrated at the particle or powder level, and other structures are rarely designed

Method used

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  • Super-hydrophobic metal-organic framework array, as well as preparation method and application thereof
  • Super-hydrophobic metal-organic framework array, as well as preparation method and application thereof
  • Super-hydrophobic metal-organic framework array, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Cut a stainless steel mesh with a size of 2cm×3cm×0.05cm, put it in 12mL acetone, ultrasonically clean it for 30s, and dry it at 80°C for later use;

[0029] (2) Weigh 0.89g of zinc nitrate hexahydrate, 0.45g of 2-methylimidazole, and 0.235g of anhydrous sodium formate, dissolve them in 25mL of ethanol, and ultrasonicate for 10min; place the clean stainless steel mesh obtained in step (1) vertically in a Put the solution in a polytetrafluoroethylene reactor; react at 90°C for 10 hours to obtain a ZnO array; place the ZnO array in ethanol for 15 seconds to remove excess ZnO on the surface, dry it at room temperature, and set aside;

[0030] (3) Weigh 0.40g of benzimidazole and dissolve it in 30mL of N,N-dimethylformamide, and ultrasonicate for 2min until the solution is completely clear; place the ZnO array obtained in step (2) vertically in a In a polytetrafluoroethylene reactor; react at 130°C for 10 hours to obtain a ZIF-7 array; wash the ZIF-7 array with N,N-dime...

Embodiment 2

[0033] (1) Cut a ceramic membrane with a size of 2cm×3cm×0.1cm, place it in 20mL acetone for ultrasonic cleaning for 30s, and dry it at 80°C for later use;

[0034] (2) Weigh 0.89g of zinc nitrate hexahydrate, 0.45g of 2-methylimidazole, and 0.235g of anhydrous sodium formate and dissolve them in 25mL of ethanol, and ultrasonicate for 10min; place the clean ceramic membrane obtained in step (1) vertically in a Put the clarified solution in a polytetrafluoroethylene reactor; react at 90°C for 10 hours to obtain a ZnO array; put the ZnO array in ethanol and ultrasonically remove excess ZnO on the surface for 15 seconds, dry it at room temperature, and set aside;

[0035] (3) Weigh 0.40g of benzimidazole and dissolve it in 30mL of N,N-dimethylformamide, and ultrasonicate for 2min until the solution is completely clear; place the ZnO array obtained in step (2) vertically in a In a polytetrafluoroethylene reactor; react at 130°C for 10 hours to obtain a ZIF-7 array; wash the ZIF-7 ...

Embodiment 3

[0038] (1) Cut a stainless steel mesh with a size of 2cm×3cm×0.05cm, put it in 12mL acetone, ultrasonically clean it for 30s, and dry it at 80°C for later use;

[0039] (2) Weigh 0.625g of zinc nitrate hexahydrate, 0.25g of 2-methylimidazole, and 0.125g of anhydrous sodium formate, dissolve them in 35mL of ethanol, and ultrasonicate for 10min; place the clean stainless steel mesh obtained in step (1) vertically in a Put the solution in a polytetrafluoroethylene reactor; react at 150°C for 10 hours to obtain a ZnO array; place the ZnO array in ethanol for 15 seconds to remove excess ZnO on the surface, dry it at room temperature, and set aside;

[0040](3) Weigh 0.60g of benzimidazole and dissolve it in 36mL of N,N-dimethylformamide, and ultrasonicate for 2min until the solution is completely clear; place the ZnO array obtained in step (2) vertically on the In a polytetrafluoroethylene reactor; react at 140°C for 10 hours to obtain a ZIF-7 array; wash the ZIF-7 array with N,N-d...

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Abstract

The invention discloses a preparation method for a super-hydrophobic metal-organic framework array. The method is implemented by the following steps: performing ultrasonic treatment and drying on an inorganic or organic material adopted as a substrate in an organic solvent to obtain a pretreated substrate; dissolving zinc nitrate hexahydrate, 2-methylimidazole and anhydrous sodium formate in ethanol, performing ultrasonic treatment, then adding the pretreated substrate, and performing reaction for 5 to 10h under the condition of 50 to 150 DEG C to obtain a ZnO array; dissolving benzimidazole in N,N-dimethylformamide, performing ultrasonic treatment, then adding the ZnO array, and performing reaction for 10h under the condition of 80 to 140 DEG C to obtain the super-hydrophobic metal-organic framework array. The super-hydrophobic metal-organic framework array may be applied to the field of oil-water separation; super-hydrophobicity can still be achieved under the condition of modification with no low-surface energy substance, and the array has relatively high thermal stability, and can be used for efficiently separating multiple oil-water mixtures.

Description

(1) Technical field [0001] The invention relates to the technical field of preparation of superhydrophobic materials and treatment of oily wastewater, in particular to a superhydrophobic metal-organic framework array and its preparation method and oil-water separation application. (2) Background technology [0002] In recent years, the preparation and application of superhydrophobic materials have received extensive attention. Superhydrophobic materials not only have excellent water resistance, but also have great application value in the fields of self-cleaning, metal anticorrosion, anti-icing, oil-water separation, and drag reduction in pipeline transportation. At present, in order to achieve superhydrophobic effect, a large number of low surface energy substances are used to prepare superhydrophobic surfaces, especially fluorine-containing materials. However, fluorine-containing materials are expensive and have adverse effects on the environment and human body. For examp...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 张国亮张家恒徐泽海孟琴
Owner ZHEJIANG UNIV OF TECH
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