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Melamine@ZIF-67 modified sponge oil absorption material as well as preparation method thereof

A ZIF-67, modified sponge technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problem that the hydrophobicity needs to be further improved, and achieve low density, high hydrophobicity, and high porosity. Effect

Inactive Publication Date: 2018-12-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material prepared by this method only has a water contact angle of ~130°, and the water contact angle of the melamine sponge soaked in cobalt nitrate solution is only 118.7°, and its hydrophobic performance needs to be further improved.

Method used

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  • Melamine@ZIF-67 modified sponge oil absorption material as well as preparation method thereof
  • Melamine@ZIF-67 modified sponge oil absorption material as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Preparation of low-density and highly hydrophobic melamine@ZIF-67 modified sponge

[0020] Sequentially weigh 0.249g of cobalt nitrate hexahydrate and 0.328g of dimethylimidazole in a 50ml beaker, add 25ml of methanol and stir to dissolve. Vigorously stir the methanol solution of cobalt nitrate hexahydrate on a magnetic stirrer, pour the methanol solution of dimethylimidazole into the vigorously stirred solution of cobalt nitrate hexahydrate, until the solution appears blue turbid, stop stirring, and soak the melamine sponge In the ZIF-67 precursor suspension, let stand at room temperature for 24h.

[0021] After the reaction, the obtained block product was stirred and washed three times with deionized water, and the product was dried in an oven at 55°C for 8 hours to obtain a dry melamine@ZIF-67 modified sponge.

[0022] The low-density bulk melamine@ZIF-67 modified sponge oil-absorbing material prepared in Example 1 was subjected to scanning electron micro...

Embodiment 2

[0024] Example 2: Preparation of low-density and highly hydrophobic melamine@ZIF-67 modified sponge

[0025] Sequentially weigh 0.249g of cobalt nitrate hexahydrate and 0.246g of dimethylimidazole into a 50ml beaker, add 25ml of methanol and stir to dissolve. Vigorously stir the methanol solution of cobalt nitrate hexahydrate on a magnetic stirrer, pour the methanol solution of dimethylimidazole into the vigorously stirred solution of cobalt nitrate hexahydrate, until the solution appears blue turbid, stop stirring, and soak the melamine sponge In the ZIF-67 precursor suspension, let stand at room temperature for 24h.

[0026] After the reaction, the resulting block product was stirred and washed three times with deionized water, and the product was dried in an oven at 55°C for 8 hours to obtain a dry melamine@ZIF-67 modified sponge. The measured oil absorption ratio of the material is 100 times.

Embodiment 3

[0027] Example 3: Preparation of low-density and highly hydrophobic melamine@ZIF-67 modified sponge

[0028] Sequentially weigh 0.249g of cobalt nitrate hexahydrate and 0.164g of dimethylimidazole in a 50ml beaker, add 25ml of methanol and stir to dissolve. Vigorously stir the methanol solution of cobalt nitrate hexahydrate on a magnetic stirrer, pour the methanol solution of dimethylimidazole into the vigorously stirred solution of cobalt nitrate hexahydrate, until the solution appears blue turbid, stop stirring, and soak the melamine sponge In the ZIF-67 precursor suspension, let stand at room temperature for 24h.

[0029] After the reaction, the obtained block product was stirred and washed three times with deionized water, and the product was put into an oven at 55° C. for 8 hours to obtain a dried product. The measured oil absorption ratio of the material is 100 times.

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PUM

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Abstract

The invention discloses melamine@ZIF-67 modified sponge oil absorption material as well as a preparation method thereof. The method adopts melamine sponge, dimethylimidazole and cobalt nitrate hexahydrate as raw materials, the melamine sponge is soaked in ZIF-67 precursor suspension to prepare low-density block-shaped MS@ZIF-67 sponge body oil absorption material. The melamine@ZIF-67 modified sponge oil absorption material is simple in process, low in cost and capable of being directly synthesized into a material with excellent performance in a one-step method. The melamine@ZIF-67 modified sponge oil absorption material has high porosity, low density, large surface area and high hydrophilic performance, can be floated on the water surface, has high oil absorption rate (the absorption ratefor diesel is 103 times) and is suitable for treating oil pollution of water.

Description

technical field [0001] The invention relates to a melamine@ZIF-67 modified sponge oil-absorbing material and a preparation method thereof, belonging to the technical field of adsorbent materials. Background technique [0002] Currently, oil pollution treatment methods include chemical treatment, biological treatment and physical treatment. Chemical treatment methods include combustion method, emulsification method, etc. Biological treatment includes the use of activators, increasing the number of microorganisms, adding N, P, etc. in seawater to promote the degradation of oil by microorganisms, but so far, biological methods have not been widely used. Physical treatments include gravity separation, centrifugation, filtration and adsorption. Among them, the most commonly used physical treatment method is the adsorption method. The adsorption method has the advantages of rapidity, high efficiency, and no secondary pollution. The quality of the adsorption effect depends to a l...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/265B01J20/28045
Inventor 姜炜张雅娜张宁周宇郝嘎子胡玉冰宋欣
Owner NANJING UNIV OF SCI & TECH
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