Preparation and application of a magnetic hydrogel loaded with one-dimensional Fe3O4 nanocrystals

A technology of nanocrystals and polymer hydrogels, which can be used in multi-stage water/sewage treatment, water/sludge/sewage treatment, alkali metal oxides/hydroxides, etc., and can solve problems such as uneven distribution of magnetic particles , to achieve narrow size distribution, pollutant adsorption performance and catalytic decomposition performance, and improve the efficiency of sewage treatment

Active Publication Date: 2018-03-16
扬州爱科新材料科技有限公司
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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a load one-dimensional structure controllable Fe 3 o 4 The preparation and application of nanocrystalline magnetic polymer hydrogel, this method does not use any toxic reagents and organic reagents, and can be controlled in situ in the hydrogel network by a simple and gentle co-precipitation method to obtain a loaded one-dimensional structure ( Rod) Fe 3 o 4 Nanocrystalline magnetic polymer hydrogel, and overcomes the problem of uneven distribution of magnetic particles

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  • Preparation and application of a magnetic hydrogel loaded with one-dimensional Fe3O4 nanocrystals
  • Preparation and application of a magnetic hydrogel loaded with one-dimensional Fe3O4 nanocrystals
  • Preparation and application of a magnetic hydrogel loaded with one-dimensional Fe3O4 nanocrystals

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Embodiment 1

[0029] A loaded one-dimensional Fe 3 o 4 The preparation method of the magnetic polymer hydrogel of nanostructure, the steps are as follows:

[0030] Step 1: Add 0.5 g sodium carboxymethyl cellulose powder to 18 ml of deionized water at room temperature, heat and stir at 50° C. for 2 hours to obtain a 2.6% sodium carboxymethyl cellulose aqueous solution;

[0031] Step 2: FeSO 4 with Fe 2 (SO 4 ) 3 Mix according to the ratio of 1:1 mass, add deionized water to prepare 1mol / L iron ion solution;

[0032] Step 3: Stir the sodium carboxymethyl cellulose aqueous solution obtained in step 1 and the iron ion solution obtained in step 2 under a motor whose rotation speed is 1000-2000 m / min, and mix well to obtain sodium carboxymethyl cellulose water loaded with iron ions gel;

[0033] Step 4: Prepare 20ml of 2.5mol / L NaOH solution;

[0034] Step 5: Soak the hydrogel loaded with iron ions in step 3 into the prepared NaOH solution, heat in a water bath to 50° C., and keep at a co...

Embodiment 2

[0038] A loaded one-dimensional Fe 3 o 4 The preparation method of the magnetic polymer hydrogel of nanostructure, the steps are as follows:

[0039] Step 1: Take 1mol 2-acrylamide-2-methyl propane sodium as a monomer, 0.1mol methylene bisacrylamide as a crosslinking agent, and 0.001mol α-ketoglutaric acid as an initiator, by utilizing 365nm ultraviolet light Initiated free radical polymerization to form poly-2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel with 10% crosslink density;

[0040] Step 2: FeSO 4 with Fe 2 (SO 4 ) 3 Mix according to the ratio of mass to 10:1, add deionized water to prepare 2M iron ion solution;

[0041] Step 3: immerse 3 g of the obtained poly-2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel into 50 ml of the obtained iron ion solution, soak at room temperature for 24 hours, so that the anionic hydrogel and iron ions are completely adsorbed;

[0042] Step 4: Prepare 20mol 3.0mol / L NaOH solution;

[0043] Step 5: So...

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Abstract

Preparation and application of a magnetic polymer hydrogel loaded with one-dimensional iron ferric oxide nanocrystals, preparing anionic hydrogel or anionic hydrogel precursor solution, and preparing FeSO4 and Fe2(SO4)3 mixed water to form iron Ionic solution; then mix the two, soak at room temperature, so that the anionic hydrogel completely absorbs iron ions; soak the hydrogel that has absorbed iron ions in NaOH solution, and heat it in a water bath to obtain a magnetic material loaded with one-dimensional Fe3O4 nanocrystals. The polymer hydrogel can be used to treat sewage containing organic dyes. The present invention does not use any toxic or organic reagents, and obtains a loaded one-dimensional structure (rod-shaped ) Magnetic polymer hydrogel of Fe3O4 nanocrystals, and overcomes the problem of uneven distribution of magnetic particles.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, in particular to a one-dimensional Fe with controllable loading morphology. 3 o 4 Preparation method of magnetic polymer hydrogel with nanocrystals and its application in treating sewage with organic dyes. Background technique [0002] Nano-Fe3O4 / polymer hydrogel composites have become a hot issue in the research of inorganic nanomaterials / polymer composites. Due to its combination of the magnetic responsiveness of ferroferric oxide nanoparticles, catalase-like properties, and the unique three-dimensional hydrophilic network framework of polymer hydrogels that allow free diffusion of small molecules and ions, it is widely used in pharmaceuticals. Sustained-release systems, targeted therapy, biosensors, medical analysis and diagnosis, energy storage, environmental testing, and sewage treatment have broad application prospects. [0003] Studies have shown that the properties ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J31/28C02F9/04
Inventor 陈咏梅高扬杨志懋
Owner 扬州爱科新材料科技有限公司
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