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A method for preparing ionic composite magnetic particle adsorbent by photoinitiation

A technology of composite magnetic particles and photoinitiators, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of difficult large-scale production, high grafting cost, and grafting rate Low-level problems, to achieve the effect of reducing self-aggregation, easy to separate, and not easy to peel off

Inactive Publication Date: 2017-07-11
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above grafting methods can achieve the purpose of grafting, they all have the common problems of low grafting rate, high grafting cost, low utilization rate of monomers, and difficulty in large-scale production.

Method used

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  • A method for preparing ionic composite magnetic particle adsorbent by photoinitiation
  • A method for preparing ionic composite magnetic particle adsorbent by photoinitiation
  • A method for preparing ionic composite magnetic particle adsorbent by photoinitiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a magnetic particle ion-exchange composite adsorbent, comprising the steps of:

[0033] 1) Firstly, Fe was prepared by co-precipitation method 3 o 4 (nano) magnetic particles: weigh 6mmol FeSO 4 and 12mmol FeCl 3 Dissolve in 20mL deionized water (molar ratio Fe 3+ :Fe 2+ =2:1), under the condition of mechanical stirring, slowly add 80mL NH 3 ·H 2 O (concentration is 5wt%) solution, continue to react at room temperature for 8h, wash with deionized water and ethanol multiple times with ultrasonic water (multiple times are 2-4 times each), magnetically separate, place in a 60°C vacuum oven to dry, and obtain magnetic Particles (Fe 3 o 4 magnetic particles);

[0034] 2) Weigh 1g of the magnetic particles prepared in step 1) and disperse them in 20mL of deionized water, add dropwise 40mL of modifier solution (2.5wt%, oleic acid), and add 0.1g of iron salt as an esterification catalyst (trichloro iron oxide), drop a drop of OP-10 (0.2g), mecha...

Embodiment 2

[0040] A method for preparing a magnetic particle ion-exchange composite adsorbent, comprising the steps of:

[0041] 1) Firstly, Fe was prepared by co-precipitation method 3 o 4 (nano) magnetic particles: weigh 8mmolFeSO 4 and 16mmolFeCl 3 Dissolve in 20mL deionized water (molar ratio Fe 3+ :Fe 2+ =2:1), under the condition of mechanical stirring, slowly add 40mL NH 3 ·H 2 O (concentration is 10wt%) solution, continue to react at normal temperature for 24h, wash with deionized water and ethanol multiple times with ultrasonic water (multiple times are 2-4 times each), magnetically separate, and place in a 60°C vacuum oven to dry to obtain magnetic Particles (Fe 3 o 4 magnetic particles);

[0042] 2) Weigh 1g of the magnetic particles prepared in step 1) and disperse them in 20mL of deionized water, add dropwise 20mL of modifier solution (1.25wt%, stearic acid. That is, organic modifier solution, the same below), add 0.05 gFeCl 3 Iron salt is used as esterification r...

Embodiment 3

[0046] A method for preparing a magnetic particle ion-exchange composite adsorbent, comprising the steps of:

[0047] 1) Firstly, Fe was prepared by co-precipitation method 3 o 4 (nano) magnetic particles: weigh 4mmolFeSO 4 and 8mmolFeCl 3 Dissolve in 10mL deionized water (molar ratio Fe 3+ :Fe 2+ =2:1), under the condition of mechanical stirring, slowly add 40mL NH 3 ·H 2 O (concentration is 5wt%) solution, continue to react at room temperature for 24h, wash with deionized water and ethanol multiple times with ultrasonic water (multiple times are 2-4 times each), magnetically separate, and place in a 60°C vacuum oven to dry to obtain magnetic Particles (Fe 3 o 4 magnetic particles);

[0048] 2) Weigh 1g of the magnetic particles prepared in step 1) and disperse them in 10mL of deionized water, add dropwise 20mL of modifier solution (2.0wt%, palmitic acid), and add 0.075g of iron salt as an esterification catalyst (trichloride iron), drop emulsifier OP-10 (0.1g), mec...

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Abstract

The invention belongs to the inorganic-organic composite material technology field. Provided is a method for preparing an ionic composite magnetic particle adsorbent through photo-initiation. The method is characterized in that the method comprises the following steps: firstly, Fe3O4 magnetic particles are prepared through a coprecipitation method; secondly, surface organic modified Fe3O4 is prepared from the magnetic particles, deionized water, esterification catalysts, an organic modifier solution and an emulsifier according to ratios of 1g:10-20mL:0.05-0.1g:20-40mL:0.1-0.2g; thirdly, an acrylic monomer aqueous solution is prepared in a quartz glass tube, photoinitiators are added, preheating is carried out for 30min, then surface organic modified Fe3O4 obtained in the second step is added, mechanical dispersion is carried out, then polymerization inhibitors are added, after nitrogen is inputted for 10min, sealing is carried out, a grafting reaction is carried out under ultraviolet irradiation with mechanical stirring, washing magnetic separation is carried out, and polyacrylic acid grafting magnetic particles are obtained; fourthly, the polyacrylic acid grafting magnetic particles are added in a HCl solution, shaking is carried out, then the polyacrylic acid grafting magnetic particles are stirred in a NaOH solution, sodium modification transition is carried out, and an ionic composite magnetic particle adsorbent is obtained. The method is advantageous in that preparation is simple, recovery is easy, the adsorption capacity is high, and the prepared adsorbent can be used repeatedly.

Description

technical field [0001] The invention belongs to the technical field of inorganic-organic composite materials, and in particular relates to a preparation method of a magnetic ion-exchange particle adsorbent. Background technique [0002] A large number of polymers have been developed into excellent adsorption materials due to their rich functional groups, and have been widely used in water purification, enzyme immobilization, blood purification, drug delivery and other fields. Among them, chemical products such as ion-exchange polymers such as resins / fibers, as the most common adsorption materials on the market, have made great progress in the treatment of industrial wastewater such as heavy metal ion wastewater and printing and dyeing wastewater. Although polymers have excellent adsorption properties, they also have inherent bottlenecks in the application process. For example, their mechanical strength is insufficient, and the skeleton is easy to collapse during use; polluta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28
Inventor 周奇严春杰罗文君李徐坚
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)