Photoresponse magnetic nano-particles with wettability reversible conversion and preparation method of photoresponse magnetic nano-particles

A magnetic nanoparticle, nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve problems such as environmental hazards, difficult biodegradation, low surface free energy, etc., and achieve environmental pollution. Small, improve the effect of easy agglomeration and stability

Pending Publication Date: 2021-07-20
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, azobenzene derivatives containing fluorocarbon chains are often used in the preparation of smart responsive wetting surfaces because of their extremely low surface free energy. However, organic compounds containing fluorocarbon chains are harmful to the environment and are difficult to biodegrade. attention

Method used

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  • Photoresponse magnetic nano-particles with wettability reversible conversion and preparation method of photoresponse magnetic nano-particles
  • Photoresponse magnetic nano-particles with wettability reversible conversion and preparation method of photoresponse magnetic nano-particles
  • Photoresponse magnetic nano-particles with wettability reversible conversion and preparation method of photoresponse magnetic nano-particles

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Weigh 1.08 g FeCl 3 ·6H 2 O and 3.0 g of sodium acetate were dissolved in 30 mL of ethylene glycol. After stirring at room temperature for 30 min, the mixed solution was transferred to a high-pressure reactor and placed in an oven with the temperature set at 200 ° C. After 8 h of reaction , after the autoclave is cooled to room temperature, the Fe 3 o 4 The magnetism was used for solid-liquid separation and washed with deionized water and ethanol three times each. After cleaning, put it into 50 ℃ vacuum drying for 10 h to obtain dry black Fe 3 o 4 nanoparticles.

[0034] (2) Weigh 0.1 g Fe 3 o 4 Particles were dispersed in a mixture of 40 mL of absolute ethanol and 10 mL of deionized water. After ultrasonic dispersion for 30 min, 2.5 mL of ammonia water was added and placed on a magnetic stirrer to stir for 10 min. Measure 200 μL of TEOS into 10 mL of absolute ethanol, and transfer it to the Fe 3 o 4 In the dispersion of particle ethanol and deionized wate...

Embodiment 2

[0043] (1) Weigh 1.08 g FeCl 3 ·6H 2 O and 3.0 g of sodium acetate were dissolved in 30 mL of ethylene glycol, and after stirring for 1 h at room temperature, the mixed solution was transferred to a high-pressure reactor and placed in an oven with the temperature set at 160 °C. , after the autoclave is cooled to room temperature, the Fe 3 o 4 The magnetism was used for solid-liquid separation and washed with deionized water and ethanol three times each. After cleaning, put it into 50 ℃ vacuum drying for 10 h to obtain dry black Fe 3 o 4 nanoparticles.

[0044] (2) Weigh 0.1 g Fe 3 o 4 Particles were dispersed in a mixture of 10 mL of absolute ethanol and 10 mL of deionized water. After ultrasonic dispersion for 30 min, 2.5 mL of ammonia water was added and placed on a magnetic stirrer to stir for 10 min. Measure 100 μL of TEOS into 10 mL of absolute ethanol, and transfer it to the Fe 3 o 4 In the dispersion of particle ethanol and deionized water, stirring was contin...

Embodiment 3

[0048] (1) Weigh 1.08 g FeCl 3 ·6H 2 O and 3.0 g of sodium acetate were dissolved in 30 mL of ethylene glycol, and after stirring at room temperature for 30 min, the mixed solution was transferred to a high-pressure reactor and placed in an oven with the temperature set at 200 °C. , after the autoclave is cooled to room temperature, the Fe 3 o 4 The magnetism was used for solid-liquid separation and washed with deionized water and ethanol three times each. After cleaning, put it into 50 ℃ vacuum drying for 10 h to obtain dry black Fe 3 o 4 nanoparticles.

[0049] (2) Weigh 0.1 g Fe 3 o 4 Particles were dispersed in a mixture of 30 mL of absolute ethanol and 15 mL of deionized water. After ultrasonic dispersion for 30 min, 2.5 mL of ammonia water was added and placed on a magnetic stirrer to stir for 10 min. Measure 100 μL of TEOS into 10 mL of absolute ethanol, and transfer it to the Fe 3 o 4 In the dispersion of particle ethanol and deionized water, stirring was con...

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Abstract

The invention belongs to the technical field of functional materials, and particularly relates to preparation of photoresponsive magnetic nanoparticles with reversible wettability conversion. The method comprises the following steps: preparing Fe3O4 magnetic nanoparticles; coating Fe3O4 magnetic nanoparticles with SiO2, so as to obtain Fe3O4-coating SiO2 nanoparticles; carrying out amination on the Fe3O4-coating SiO2 to obtain Fe3O4-coating SiO2-NH2 nano particles; and modifying an azobenzene derivative AzoC6 acid with the Fe3O4-coating SiO2-NH2, so as to obtain the Fe3O4-coating SiO2-AzoC6 light response magnetic nano particle. The preparation method is simple, the fluorine-free azobenzene derivative is used as a photoresponse molecule, the price is low, the environmental pollution is small, the photoresponse rate is high, the good wettability reversible conversion characteristic is achieved, the long-term stability is achieved, meanwhile, the magnetic response performance is achieved, and recycling is convenient.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a photoresponsive magnetic nano particle with wettability reversible conversion and a preparation method thereof. Background technique [0002] Wettability is an important property between solid-liquid interface. In recent years, the research on infiltrating materials has received extensive attention. The existing single-type infiltrating materials can no longer meet the needs of actual production and life. Wetting and reversible switching materials that can respond to external stimuli, that is, intelligent responsive infiltrating materials should be used. And born. Among external stimuli, compared with other stimuli such as solvent stimulation and temperature stimulation, light stimulation has the characteristics of non-contact, high precision positioning and low pollution. Therefore, light-responsive smart surfaces with reversible switching of wettabi...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01B33/12B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B33/12C01G49/06C01P2004/03C01P2004/61C01P2006/42
Inventor 张卫英王桂雪李晓林畅毛作东
Owner FUZHOU UNIVERSITY
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