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Silanized functionalized ionic liquid/hydrotalcite-like compound composite material, and preparation method and application thereof

A technology of ionic liquid and composite material, applied in the field of silanized ionic liquid/hydrotalcite-like composite material

Active Publication Date: 2013-11-20
嘉兴如运建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the preparation of silane-functionalized ionic liquids and hydrotalcite-like composites and their application in organic pollutants have not been covered in the literature. This work is of great significance for further expanding the application of hydrotalcite-like in the environmental field

Method used

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  • Silanized functionalized ionic liquid/hydrotalcite-like compound composite material, and preparation method and application thereof
  • Silanized functionalized ionic liquid/hydrotalcite-like compound composite material, and preparation method and application thereof
  • Silanized functionalized ionic liquid/hydrotalcite-like compound composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (a) Preparation of silane functionalized ionic liquid 1-methyl-3-(triethoxysilylpropyl) imidazole hydrochloride

[0039] Pipette 20 mL of N-methylimidazole (10.3 g, 0.25 mol) into a round-bottom flask, and add 59.6 mL (60.20 g, 0.25 mol) of equimolar 3-chloropropyltriethoxysilane to the flask under constant stirring. The mixture was added to the same volume of absolute ethanol (20 mL) as N-methylimidazole, and the reaction solution was refluxed and stirred at 80°C for 96 hours. During the reaction, it was protected by nitrogen. After the reaction, the solvent and unreacted volatile substances were removed by rotary evaporation, dissolved in a small amount of chloroform, and then subjected to silica gel column chromatography. The components were collected to remove the solvent and dried under vacuum at 40°C for 24 hours to constant weight to obtain a light yellow transparent liquid 1-formaldehyde 3-(triethoxysilylpropyl) imidazole hydrochloride;

[0040] (b) Preparation of h...

Embodiment 2

[0045] (a) Preparation of silane functionalized ionic liquid 1-methyl-3-(triethoxysilylpropyl) imidazole hydrochloride

[0046] Synthesize using the method and conditions of step (a) in Example 1;

[0047] (b) Preparation of hydrotalcite-like

[0048] The divalent metal salt Zn(NO 3 ) 2 And trivalent metal salt Al(NO 3 ) 3 Prepare a mixed salt solution at a molar ratio of 2:1, with a total metal ion concentration of 0.6 mol / L. Titrate the above mixed solution and sodium hydroxide solution with a molar concentration of 2 mol / L at the same time, and control the pH between 9.0 and 10.0 , Stirring vigorously, aging at 80°C for 8 hours. The obtained slurry was filtered by suction, the filter cake was washed 4 times with distilled water, and dried at 60°C for 24 hours to resemble hydrotalcite;

[0049] (c) Preparation of silanized ionic liquid / hydrotalcite-like composite materials

[0050] Weigh 0.8 g of silane functionalized ionic liquid and 1.6 g of hydrotalcite (mass ratio 1:2) into a r...

Embodiment 3

[0052] (a) Preparation of silane functionalized ionic liquid 1-methyl-3-(triethoxysilylpropyl) imidazole hydrochloride

[0053] Synthesize using the method and conditions of step (a) in Example 1;

[0054] (b) Preparation of hydrotalcite-like

[0055] The divalent metal salt Zn(NO 3 ) 2 And trivalent metal salt Al(NO 3 ) 3 Prepare a mixed salt solution at a molar ratio of 2:1, with a total metal ion concentration of 0.6 mol / L. Titrate the above mixed solution and sodium hydroxide solution with a molar concentration of 2 mol / L at the same time, and control the pH between 9.0 and 10.0 , Stirring vigorously, aging at 50°C for 18 hours. The obtained slurry was filtered with suction, the filter cake was washed 5 times with distilled water, and dried at 60°C for 24 hours to resemble hydrotalcite;

[0056] (c) Preparation of silanized ionic liquid / hydrotalcite-like composite materials

[0057] Weigh 0.8 g of silane functionalized ionic liquid and 0.8 g of hydrotalcite (mass ratio 1:1) into a...

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Abstract

The invention discloses a silanized ionic liquid / hydrotalcite-like compound composite material, and a preparation method and an application thereof. The preparation method comprises: firstly synthesizing a silanized ionic liquid, using silicon-hydroxy formed by hydrolization of trimethoxy in the structure of the ionic liquid to react with hydroxy on the surface of the hydrotalcite-like compound for a condensation reaction, and fixing the silanized ionic liquid to the surface of the hydrotalcite-like compound through a mode of covalent coupling, to prepare the silanized ionic liquid / hydrotalcite-like compound composite material with a lamellar structure. The prepared organic-inorganic composite material has the structure and performance advantages of the functionalized ionic liquid and the hydrotalcite-like compound; the composite material, as an absorbent, shows good adsorption removal capability on pollutions such as 2, 3-dichlorophenol, 2, 4-dichlorophenol or 2, 6-dichlorophenol in water, and has good adsorptive performance; the synergy advantage of the two materials of the silanized functionalized ionic liquid and the hydrotalcite-like compound is given a full play; and the composite material is obviously better in adsorptive performance than the hydrotalcite-like compound.

Description

technical field [0001] The invention relates to a silanized ionic liquid / hydrotalcite-like composite material; the invention also relates to a preparation method of the composite material and its application in removing pollutants in water bodies. Background technique [0002] Hydrotalcite-like (abbreviated as LDH) is a kind of two-dimensional nano-anionic clay, and its general formula can be expressed as [M 1-x 2+ m x 3+ (OH) 2 ] x+ (A n- ) x / n mH 2 O, where M 2+ Refers to divalent metal cations, M 3+ Refers to trivalent metal cations, x is M 2+ with M 3+ The molar ratio of A n- It is an anion that can exist stably between layers and has a hydrotalcite layered structure. Because of its advantages of adjustable sheet element composition and charge density, controllable interlayer guest molecules, crystal size, and low biological toxicity, it has been used in organic catalysis, Polymer additives, biomedicine, environmental protection and many other fields have sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 詹天荣侯万国徐洁张御妹
Owner 嘉兴如运建筑科技有限公司
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