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Silicon dioxide nano-microsphere with controllable particle size as well as preparation method and application of silicon dioxide nano-microsphere

A technology of silicon dioxide and nano-microspheres, applied in the fields of silicon dioxide, microsphere preparation, silicon oxide, etc., can solve the problems of large deviation of particle size control and prediction, complex prediction equations, prolonging the preparation time, etc. Implementation, wide wavelength range, operating cost savings

Pending Publication Date: 2021-08-27
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicon dioxide (SiO 2 ) Nanospheres have been widely used in emerging fields such as ceramics, chromatography, coatings, and photonic crystal materials. The existing SiO 2 Nanospheres are mainly based on The preparation method is sol-gel method. This preparation method includes one-step method and two-step method. Although the one-step method is simple, it has a large deviation between particle size control and prediction, and the prediction equation is complex and contains many parameters. The two-step method is also called The seed growth method can effectively predict the particle size, and the deviation of the measured particle size is small, but the precursor needs to be added multiple times, which prolongs the preparation time and the preparation process is complicated. At present, the one-step method for preparing SiO with uniform particle size and precise and controllable particle size 2 Nanospheres have not been reported

Method used

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  • Silicon dioxide nano-microsphere with controllable particle size as well as preparation method and application of silicon dioxide nano-microsphere
  • Silicon dioxide nano-microsphere with controllable particle size as well as preparation method and application of silicon dioxide nano-microsphere

Examples

Experimental program
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Embodiment 1

[0026] In this example, SiO with controllable particle size was prepared 2 Nano microspheres, the steps are as follows:

[0027] A. Mixing of organic solution: Stir ethanol, ammonia water and water at 60° C. and a stirring rate of 400 r / min for 1 hour, and mix thoroughly to obtain an organic solution.

[0028] B. Selection of precursors: The precursors are ethyl orthosilicate and propyl orthosilicate, and the mass ratio of the two is 1:3.

[0029] C. SiO 2 Preparation of nanosphere suspension: using the The sol-gel method of the method, the selected precursor is quickly added to the organic solution, magnetically stirred under the condition of 400r / min, and hydrolyzed and polymerized at 60°C for 10min to form SiO 2 seeds to obtain a milky white colloidal suspension, and continue to stir at a constant temperature for 2 hours to obtain a silica nanosphere suspension with a particle size of 200 nm.

[0030] D. SiO 2 Preparation of nano-microspheres: SiO 2 The nanosphere su...

Embodiment 2

[0033] In this example, SiO with controllable particle size was prepared 2 Nano microspheres, the steps are as follows:

[0034] A. Mixing of organic solution: Stir the solvent, catalyst and water at 50° C. and a stirring rate of 600 r / min for 2 hours, and mix thoroughly to obtain an organic solution.

[0035] B. Selection of precursors: The precursors are propyl orthosilicate and methyl orthosilicate, and the mass ratio of the two is 1:2.

[0036] C. SiO 2 Preparation of nanosphere suspension: using the The sol-gel method of the method, the selected precursor is quickly added to the organic solution, magnetically stirred under the condition of 800r / min, and hydrolyzed and polymerized at 50°C for 15min to form SiO 2 seeds, to obtain a milky white colloidal suspension, and continue to stir at a constant temperature for 3 hours to obtain a suspension of silica nanospheres with a particle size of 250 nm and uniform.

[0037] D. SiO 2 Preparation of nano-microspheres: SiO 2...

Embodiment 3

[0040] In this example, SiO with controllable particle size was prepared 2 Nano microspheres, the steps are as follows:

[0041] A. Mixing of organic solution: Stir the solvent, catalyst and water at 40° C. and a stirring rate of 800 r / min for 3 hours, and mix thoroughly to obtain an organic solution.

[0042] B. Selection of precursors: The precursors are ethyl orthosilicate and methyl orthosilicate, and the mass ratio of the two is 1:4.

[0043] C. SiO 2 Preparation of nanosphere suspension: using the The sol-gel method of the method, the selected precursor is quickly added to the organic solution, magnetically stirred under the condition of 1200r / min, hydrolyzed and polymerized at 40°C for 20min to form SiO 2 Seeds, to obtain a milky white colloidal suspension, and continue to stir at a constant temperature for 5h to obtain a uniform SiO with a particle size of 300nm. 2 nanosphere suspension.

[0044] D. SiO 2Preparation of nano-microspheres: SiO 2 The nano-microsph...

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Abstract

The invention discloses a silicon dioxide nano-microsphere with a controllable particle size and a preparation method and application thereof, and belongs to the technical field of photonic crystal metamaterials. The porosity of the silicon dioxide nano-microsphere is 50%-90%, the particle size is uniform and controllable between 150 nm and 500 nm, the dispersion coefficient is smaller than 0.1, and the roundness tolerance is smaller than 0.02 mm; The preparation method comprises steps: rapidly adding a precursor into an organic solution formed by fully mixing a solvent, a catalyst and water, carrying out hydrolytic polymerization under a magnetic stirring condition to form silicon dioxide seeds, continuously carrying out constant-temperature stirring after obtaining a milk white colloid suspension to obtain a silicon dioxide nano-microsphere suspension, filtering, purifying and drying to obtain the silicon dioxide nano-microsphere. The problems that the particle size is uncontrollable when a one-step method is adopted for preparing the SiO2 nano-microspheres and a two-step method is complex in process are solved at the same time, the color is bright and diversified, the full-spectrum color can be covered, and the SiO2 nano-microspheres can serve as a full-spectrum color material to be applied to occasions such as coatings, pigments, photonic crystal ink, industrial printing, textiles and garments or packaging films.

Description

technical field [0001] The invention belongs to the technical field of photonic crystal metamaterials, and in particular relates to a silicon dioxide nano-microsphere with controllable particle size and its preparation method and application. Background technique [0002] The traditional textile printing and dyeing industry mainly relies on chemical colorants such as dyes and pigments to color textiles, which has problems such as water and energy consumption, serious pollution, and low resource utilization. The structural color opposite to this chemical color is the color produced by the interaction, diffraction and scattering of the micron or nanoscale physical structure of the object itself and light. Compared with traditional chemical dyeing, structural color has bright, The advantages of changing colors and not fading have attracted more and more attention. [0003] Natural opal gem is a typical material with structural color properties. It is a three-dimensional photon...

Claims

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Application Information

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IPC IPC(8): C01B33/18B01J13/02
CPCC01B33/18B01J13/02C01P2004/62C01P2004/32
Inventor 高伟洪林田田陈凯凯辛三法辛斌杰陈佳颖严凯耀
Owner SHANGHAI UNIV OF ENG SCI