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Preparation method of spherical SiO2 particles

A spherical and granular technology, which is applied in the field of preparation of spherical SiO2 particles, can solve problems such as self-assembly difficulties, and achieve the effects of simple operation, mild reaction conditions and good dispersion

Inactive Publication Date: 2013-04-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is important because it is difficult to precisely control the self-assembly of building matrices at the molecular level by stirring mucus in a confined space.

Method used

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  • Preparation method of spherical SiO2 particles
  • Preparation method of spherical SiO2 particles
  • Preparation method of spherical SiO2 particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve 0.2g CTAB, 500μL TEOS and 1g PVP in a conical flask containing 10 mL of isopropanol at 40°C; then place the conical flask containing the mixed solution in a constant temperature shaker, and at room temperature After 48h of 100r / min treatment, a clear and transparent spinning solution was obtained. After the solution is prepared, a certain amount of PVP spinning solution is drawn with a syringe, fixed on the electrostatic spinning device, and various spinning parameters are adjusted for electrospinning.

[0032] The nanofibers obtained by electrospinning were peeled off from the aluminum foil and put into a 250mL three-necked flask. Then, the pre-prepared ethanol aqueous solution (pH 9.0) with an ethanol volume concentration of 80% was added to it and kept at 40°C , Strong stirring (100r / min) 24h, then spherical SiO 2 Nanoparticles.

[0033] During electrospinning, the syringe specification is 5mL, the inner diameter of the needle is about 1mm, and the receiving scr...

Embodiment 2

[0036] Dissolve 0.2g CTAB, 500μL TEOS and 0.8g PVP in a conical flask containing 10mL isopropanol at 40℃; then put the conical flask containing the mixed solution in a constant temperature shaker, After processing at 100r / min for 48h, a clear and transparent spinning solution was obtained. After the solution is prepared, a certain amount of PVP spinning solution is drawn with a syringe, fixed on the electrostatic spinning device, and various spinning parameters are adjusted for electrospinning.

[0037] During electrospinning, the syringe specification is 5mL, the inner diameter of the needle is about 1mm, and the receiving screen is grounded with aluminum foil; the spraying flow rate is 2mL / h, the voltage is 10kV, and the distance between the needle and the receiving screen is 15cm.

[0038] The nanofibers obtained by electrospinning were peeled off from the aluminum foil and put into a 250ml three-necked flask, and then the pre-prepared ethanol aqueous solution (PH8.0) with a vol...

Embodiment 3

[0040] Dissolve 0.2g CTAB, 500μL TEOS and 1.2g PVP in a conical flask containing 10 mL of isopropanol at 40°C; then place the conical flask containing the mixed solution in a constant temperature shaker and keep it at room temperature. After processing at 100r / min for 48h, a clear and transparent spinning solution was obtained. After the solution is prepared, a certain amount of PVP spinning solution is drawn with a syringe, fixed on the electrostatic spinning device, and various spinning parameters are adjusted for electrospinning.

[0041] During electrospinning, the syringe specification is 5mL, the inner diameter of the needle is about 1mm, and the receiving screen is grounded with aluminum foil; the discharge flow rate is 3.5mL / h, the voltage is 13kV, and the distance between the needle and the receiving screen is 18cm.

[0042] The nanofibers obtained by electrospinning were peeled off from the aluminum foil and put into a 250ml three-necked flask. Then, the pre-prepared etha...

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Abstract

The invention relates to a preparation method of spherical SiO2 particles. The preparation method comprises the steps of (1) dissolving cetyl trimethyl ammonium bromide (CTAB), tetraethoxysilane (TEOS) and polyvinylpyrrolidone (PV) into solvent, oscillating for 24-48 hours to obtain spinning solution, and then carrying out electrostatic spinning to obtain nanofiber; (2) dissolving the nanofiber into ethanol water, and stirring at the temperature of 20-40 DEG C, so as to obtain the spherical SiO2 particles. The preparation method is simple to operate, and mild in reaction condition; the used material is easy to get and low in price, and free of poison and pollution, and spherical SiO2 particles have excellent biocompatibility; the spherical SiO2 particles obtained by the preparation method are good in dispersibility, uniform in grain diameter, structured in shape, and high in chemical stability, and have the advantages of common nano particles. By adopting the method for preparing the spherical SiO2 particles, the grain diameters of the SiO2 particles can be effectively controlled.

Description

Technical field [0001] The invention belongs to SiO 2 The field of preparation of nanomaterials, especially a spherical SiO 2 Preparation method of particles. Background technique [0002] Since 1968 Monodisperse SiO is synthesized for the first time 2 Since then, research on the special properties and applications of nano-silica has been increasing year by year. Mesoporous nano-silica has many excellent properties, including low toxicity, high surface area, large pore volume, adjustable pore size and good biocompatibility. In addition, its silanol surface is easily modified with a series of functional groups. Therefore, nano-silica has been widely researched and applied in biomedical fields such as cell imaging and sensing, ultra-sensitive detection of DNA, lysis protection of DNA, and preparation of biomaterials using colloidal particles as templates, which has caused extensive scientific research. The interest of the person. At present, there are many methods for preparing...

Claims

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Application Information

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IPC IPC(8): C01B33/12B82Y30/00B82Y40/00
Inventor 朱利民张培培聂华丽田利强娄少峰
Owner DONGHUA UNIV
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