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A kind of monodisperse yolk-shell structure silicon dioxide microsphere preparation method

A silicon dioxide, monodisperse technology, applied in the direction of silicon dioxide, silicon oxide, nanotechnology for materials and surface science, etc., can solve the problems of simple reaction conditions, less green and environmental protection processes, etc., to achieve simple preparation process, The effect of uniform shape and short production cycle

Active Publication Date: 2019-04-30
华挺纳米科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some reports on the preparation technology of existing preparation yolk-shell structure silica microspheres, such as ( Chem. Commun., 2017, 53, 3761-3764; J Mater. Sci. (2014) 49:4919-4926; J. Mater. Chem. B, 2015, 3, 8303-8313), but the reaction conditions are simple, and there are few green and environmentally friendly processes, which need to be further studied

Method used

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  • A kind of monodisperse yolk-shell structure silicon dioxide microsphere preparation method
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  • A kind of monodisperse yolk-shell structure silicon dioxide microsphere preparation method

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Effect test

Embodiment 1

[0028] (1) Weigh 0.1g of sodium metaaluminate (NaAlO 2 ), put it into a clean beaker, add 30mL of deionized water and fully magnetically stir to form a colorless and transparent solution A;

[0029] (2) Weigh 0.11g of silica microspheres with a diameter of about 400nm, put them into a clean beaker, add 20mL of deionized water, and then fully ultrasonically and magnetically stir to form a white emulsion B;

[0030] (3) Under the joint action of ultrasonic and magnetic stirring, after pouring the solution A obtained in step (1) into the white emulsion B obtained in step (2), continue the joint action of ultrasonic and magnetic stirring for 10 minutes to prepare a mixed white emulsion C;

[0031] (4) Transfer the mixed white emulsion C obtained in step (3) to a reaction kettle with a polytetrafluoroethylene liner, seal it completely, heat it at a constant temperature of 140°C for 30 minutes, take out the liner, and pour off the upper layer Add water to the waste liquid, transfe...

Embodiment 2

[0039] (1) Weigh 0.08g sodium metaaluminate (NaAlO 2 ), put it into a clean beaker, add 30mL of deionized water and fully magnetically stir to form a colorless and transparent solution A;

[0040] (2) Weigh 0.10 g of silica microspheres (about 400 nm in diameter), put them into a clean beaker, add 20 mL of deionized water, and then fully ultrasonically and magnetically stir to form a white emulsion B;

[0041] (3) Under the combined action of ultrasonic and magnetic stirring, after pouring the solution A obtained in step (1) into the white emulsion B obtained in step (2), continue the combined action of ultrasonic and magnetic stirring for a certain period of time to prepare a mixed white emulsion C;

[0042](4) Transfer the mixed white emulsion C obtained in step (3) to a reaction kettle with a polytetrafluoroethylene liner, seal it completely, heat it at a constant temperature of 140°C for 30 minutes, take out the liner, and pour off the upper layer Add water to the waste ...

Embodiment 3

[0045] (1) Weigh 0.08g sodium metaaluminate (NaAlO 2 ), put it into a clean beaker, add 30mL of deionized water and fully magnetically stir to form a colorless and transparent solution A;

[0046] (2) Weigh 0.10 g of silica microspheres (about 400 nm in diameter), put them into a clean beaker, add 20 mL of deionized water, and then fully ultrasonically and magnetically stir to form a white emulsion B;

[0047] (3) Under the combined action of ultrasonic and magnetic stirring, after pouring the solution A obtained in step (1) into the white emulsion B obtained in step (2), continue the combined action of ultrasonic and magnetic stirring for a certain period of time to prepare a mixed white emulsion C;

[0048] (4) Transfer the mixed white emulsion C obtained in step (3) to a reaction kettle with a polytetrafluoroethylene liner, seal it completely, heat it at a constant temperature of 160°C for 30 minutes, take out the liner, and pour off the upper layer Add water to the waste...

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Abstract

The invention discloses a preparation method of silicon dioxide microspheres with monodisperse yolk-shell structures. The silicon dioxide microspheres with the monodisperse yolk-shell structures are prepared with a simple hydrothermal method under the condition that solid silicon dioxide microspheres are taken as hard templates, NaAlO2 is taken as an alkaline etching reagent and deionized water is taken as a solvent. NaAlO2 is ingeniously taken as the alkaline etching reagent, the dosage of NaAlO2 is reasonably controlled, the solid silicon dioxide microspheres can be etched only with the simple and rapid hydrothermal method, and the silicon dioxide microspheres with the monodisperse yolk-shell structures are obtained. The preparation process is simple, easy to operate, low in cost, green, environmentally friendly and short in production cycle, adopts easily available raw materials and has low requirements for equipment; the prepared product is easy to separate, high in purity, uniform in morphology, high in yield, free of impurities and suitable for large-scale production.

Description

technical field [0001] The invention relates to a method for preparing monodisperse yolk-shell structured silicon dioxide microspheres, belonging to the technical field of controllable preparation of micro-nano structures. Background technique [0002] Inorganic materials with micro-nano structure have the advantages of large specific surface area, rich pores, high active sites, and stable structure (such as: nanopolyhedral structure, nanobelt, micro-nano flower, sea urchin-like hierarchical structure microsphere, hollow microsphere, etc.), Their controllable preparation is of great significance for studying the application of new inorganic functional materials. Silica is a very important inorganic material, which has good biocompatibility and surface modification, and there are a large number of unsaturated residual bonds and hydroxyl groups in different states on its surface; in addition, it has a special micro-nano structure The pore space possessed by silicon can store ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B33/18C01P2002/72C01P2004/03C01P2004/04C01P2004/32
Inventor 张永兴李丽张远李德川刘义
Owner 华挺纳米科技(上海)有限公司
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