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Composite material of core/shell structure having covalent organic framework, and preparation method and application thereof

A technology of covalent organic framework and composite materials, which is applied in the field of composite materials with core-shell structure of covalent organic framework and its preparation and application, can solve the problems of difficult separation and recovery, poor stability, etc. High stability and large adsorption capacity

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, composite materials with covalent organic frameworks have been used for the adsorption of organic compound impurities such as dyes in water, but the existing covalent organic framework materials have the disadvantages of poor stability in water and difficult separation and recovery.

Method used

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  • Composite material of core/shell structure having covalent organic framework, and preparation method and application thereof
  • Composite material of core/shell structure having covalent organic framework, and preparation method and application thereof
  • Composite material of core/shell structure having covalent organic framework, and preparation method and application thereof

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preparation example Construction

[0034] Another aspect of the present invention provides the preparation method of described composite material, it comprises the following steps:

[0035] (1) Dissolve dopamine hydrochloride, hydrogen peroxide, and copper sulfate in tris buffer solution, then add Fe 3 o 4 Nanoparticles were stirred overnight at room temperature, collected by a magnet, washed, and dried to obtain Fe coated with polydopamine layer. 3 o 4 Particles (also known as Fe 3 o 4 @PDA);

[0036] (2) Fe coated with the polydopamine layer 3 o 4 The particles and amino group-containing alkoxysilane react in a solvent, are collected by a magnet, washed, and dried to obtain a modified polydopamine layer-coated Fe 3 o 4 Particles (also known as modified Fe 3 o 4 @PDA);

[0037] (3) Fe coated with modified polydopamine layer 3 o 4 The particles, 3,3'-dimethoxybenzidine and trialdehyde phloroglucinol are reacted in a solvent at high temperature, and then filtered by a magnet, washed and dried to obt...

Embodiment 1

[0050] Preparation of composite material of the present invention:

[0051] (1) Fe 3 o 4 Preparation of @PDA: mix dopamine hydrochloride (400mg), hydrogen peroxide (19.6×10 -3 M), copper sulfate (5×10 -3 M), dissolved in 200mL tris buffer solution (200mM, pH 8.5), then added 200mg of Fe 3 o 4 (particle size 200-300nm), stirred overnight at room temperature, then collected by magnet, washed 3 times with ethanol, dried to obtain the product Fe 3 o 4 @PDA.

[0052] (2) Modified Fe 3 o 4 Preparation of @PDA: the resulting Fe 3 o 4 @PDA (200mg) and 3-aminopropyltriethoxysilane (1g) were added to toluene solvent to react; after the reaction was completed, the magnet was collected, washed with ethanol for 3 times, and dried to obtain the product modified Fe 3 o 4 @PDA.

[0053] (3) Fe 3 o 4 Preparation of @PDA@ covalent framework organic composites: the modification of Fe 3 o 4 @PDA (250mg) with 3,3'-dimethoxybenzidine (85mg) and trialdehyde phloroglucinol (65mg) add...

Embodiment 2

[0058] Preparation of composite material of the present invention:

[0059] (1) Fe 3 o 4 Preparation of @PDA: mix dopamine hydrochloride (320mg), hydrogen peroxide (19.6×10 -3 M), copper sulfate (5×10 -3 M), dissolved in 200mL tris buffer solution (200mM, pH 8.5), then added 180mg of Fe 3 o 4 (particle size 200-300nm), stirred overnight at room temperature, then collected by magnet, washed 3 times with ethanol, dried to obtain the product Fe 3 o 4 @PDA.

[0060] (2) Modified Fe 3 o 4 Preparation of @PDA: the resulting Fe 3 o 4 @PDA (180mg) and 3-aminopropyltriethoxysilane (0.8g) were added to toluene solvent to react; after the reaction was completed, the magnet was collected, washed with ethanol 3 times, and dried to obtain the product modified Fe 3 o 4 @PDA.

[0061] (3) Fe 3 o 4 Preparation of @PDA@ covalent framework organic composites: the modification of Fe 3 o 4 @PDA (150mg) with 3,3'-dimethoxybenzidine (45mg) and trialdehyde phloroglucinol (30mg) added...

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Abstract

The invention relates to a composite material of core / shell structure having covalent organic framework, wherein the composite material is formed by coating a core, formed from a magnetic particle, with a shell, formed from the covalent organic framework material, a core having a structure of Fe3O4 particles coated with a polydopamine layer, wherein the particle is modified by amino-containing alkoxysilane so that -NH2 functional group is formed on the surface of the polydopamine layer; a shell structure being a reaction product of 3,3'-dimethoxybenzidine and trialdehyde phloroglucinol. The invention further relates to a preparation method and an application of the composite material.

Description

technical field [0001] The invention relates to a composite material with a core-shell structure of a covalent organic framework, a preparation method and an application thereof. Background technique [0002] Covalent organic porous polymers are mainly composed of light elements such as H, B, C, N, and O. The specific surface area, structure and function can be adjusted and other characteristics. It has shown great application value in the fields of adsorption and recognition of metal ions and dye molecules, degradation of pollutants in water, separation of organic dyes, catalysis and sensing, and has attracted widespread attention of nanomaterial researchers. In recent years, scientists have focused on hybridizing organic and inorganic materials and combining their respective advantages, which can give full play to the respective advantages of two or more different materials, such as new core-shell materials. Not only the shell layer of the core-shell material can be regu...

Claims

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Application Information

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IPC IPC(8): C08L61/22C08K9/10C08K9/06C08K3/22C08G12/08B01J20/28B01J20/30B01J20/26C02F1/28C02F101/36
CPCC08K9/10C08K9/06C08K3/22C08G12/08B01J20/262B01J20/28B01J20/28019B01J20/28009C02F1/28C02F2101/36C08K2003/2275C08K2201/003C08L61/22Y02W10/37
Inventor 李继勇赵俊桥张云芝邵红云董浩胡玉辉宋时权蒋绍辉孟博张阳
Owner CHINA PETROLEUM & CHEM CORP
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