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Magnetic nano material with CO2 responsiveness as well as preparation method and application thereof

A magnetic nano, responsive technology, applied in nanotechnology, separation methods, nanotechnology and other directions for materials and surface science, can solve the problems of low separation efficiency, difficult to control polymerization process, low selectivity of response materials, etc. The reaction process is simple, mature and stable, and the effect of low energy consumption

Pending Publication Date: 2020-10-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to overcome the technical defects in the prior art and solve the problem of traditional CO 2 The low selectivity of stimuli-responsive materials, the difficulty in controlling the polymerization process, and the low separation efficiency make the prepared CO 2 In response to nanomaterials, a variety of emulsions containing different surfactants can be separated and the separation efficiency has been greatly improved

Method used

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  • Magnetic nano material with CO2 responsiveness as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of magnetic halloysite: add 3g of halloysite and disperse evenly in 60ml of ethanol by ultrasonic. Then 2g of ferric nitrate nonahydrate was added, ultrasonicated, stirred at room temperature, and vacuum-dried at 90°C to obtain an orange powder. The obtained solid powder was impregnated with ethylene glycol, and then placed in a tube furnace with N 2 Calcined at a high temperature of 400°C for 4h. The product obtained by calcining at high temperature is fully washed with ethanol and dried;

[0038] (2) Preparation of magnetic halloysite@dopamine: add 0.0909 g (0.75 mmol) of trishydroxyaminomethane to 150 ml of deionized water. After it is completely dissolved, adjust the pH to 8.5 with dilute hydrochloric acid to obtain a buffer solution. Subsequently, 3 g of magnetic halloysite powder, 5 ml of ethanol and 0.15 g of dopamine were added to the buffer solution, stirred at room temperature and suction filtered. The obtained powder was washed 3 times wit...

Embodiment 2

[0043] (1) Preparation of magnetic halloysite: add 3.0 g of halloysite, and disperse evenly in 60 ml of ethanol by ultrasonic. Then add 2.0 g of ferric nitrate nonahydrate and ultrasonicate. Then it was stirred at room temperature, and dried under vacuum at 90°C to obtain an orange powder. The obtained solid powder was impregnated with ethylene glycol, and then placed in a tube furnace with N 2 Calcined at a high temperature of 400°C for 4h. The product obtained by calcining at high temperature is fully washed with ethanol and dried;

[0044] (2) Preparation of magnetic halloysite@dopamine: add 0.0909 g (0.75 mmol) of trishydroxyaminomethane to 150 ml of deionized water. After it is completely dissolved, adjust the pH to 8.5 with dilute hydrochloric acid to obtain a buffer solution. Subsequently, 3.0 g of magnetic halloysite powder, 5 ml of ethanol and 0.15 g of dopamine were added to the buffer solution, stirred at room temperature and suction filtered. The obtained powd...

Embodiment 3

[0049] (1) Preparation of magnetic halloysite: add 3.0 g of halloysite, and disperse evenly in 60 ml of ethanol by ultrasonic. Then add 2.0 g of ferric nitrate nonahydrate and ultrasonicate. Stir at room temperature and vacuum-dry at 90°C to obtain an orange powder. The obtained solid powder was impregnated with ethylene glycol, and then placed in a tube furnace with N 2 Calcined at 400°C for 4h. The product obtained by calcining at high temperature is fully washed with ethanol and dried;

[0050] (2) Preparation of magnetic halloysite@dopamine: add 0.0909 g (0.75 mmol) of trishydroxyaminomethane to 150 ml of deionized water. After it is completely dissolved, adjust the pH to 8.5 with dilute hydrochloric acid to obtain a buffer solution. Subsequently, 3.0 g of magnetic halloysite powder, 5 ml of ethanol and 0.15 g of dopamine were added to the buffer solution, stirred at room temperature and suction filtered. The obtained powder was washed 3 times with deionized water, an...

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Abstract

The invention relates to a magnetic nano material with CO2 responsiveness as well as a preparation method and application thereof. According to the invention, with HNTs as a carrier, the magnetic halloysite is endowed with excellent magnetism, green and environment-friendly polydopamine is biomimetic loaded on the halloysite, and a CO2 responsive polymer, namely N,N-dimethylaminoethyl methacrylate(PDMAEMA) containing sulfydryl, is grafted on the magnetic halloysite loaded with dopamine by utilizing a Michael addition reaction. The magnetic nano material with CO2 responsiveness is prepared, sothat the efficient separation of various oil-in-water and water-in-oil emulsions is realized, and the magnetic nano material has a wide application prospect.

Description

technical field [0001] The present invention relates to a CO 2 Responsive magnetic nanomaterials and their preparation methods and applications, in particular to a CO prepared by RAFT free radical polymerization 2 The preparation method of responsive polymer and its magnetic nanometer material, which is used for the separation of emulsified oil, belongs to the technical field of functional material preparation. Background technique [0002] With the improvement of people's consumption level, people's catering, tourism, and travel will lead to a large amount of sewage, which will inevitably lead to an increase in oily sewage in life. If it is not treated in time, if it is accidentally discharged into the external environment, it will cause great pollution and damage to water bodies, animals, plants, and soil. In addition, the oil spill in the Gulf of Mexico in the United States also caused serious environmental pollution. A large number of fish in the sea suffocated to deat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/22B01D53/02B01D17/02C08L33/14C08K9/12C08K9/04C08K3/22C08K7/26C08F120/34B82Y30/00
CPCB01J20/28009B01J20/28007B01J20/10B01J20/22B01D53/02B01D17/0202C08K9/12C08K9/04C08K3/22C08K7/26C08F120/34B82Y30/00C08F2438/03C08K2201/01C08K2003/2275C08K2201/011C08L33/14
Inventor 戴晓辉强昌武成的锴张豪戴江栋陈厉
Owner JIANGSU UNIV
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