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Water-soluble sodium halide micro-particles, and preparation method and application thereof

A halide and water-soluble technology, applied in the direction of calcium/strontium/barium halides, magnesium halides, ammonium halides, etc., can solve the problems that the shape of sodium chloride particles is limited to cubes, no hollow structure is proposed, and the preparation steps are complicated. , to achieve the effect of complete green environmental protection technology revolution and easy removal

Active Publication Date: 2013-09-25
江苏先进无机材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In 2009, it was reported that micron-sized sodium chloride particles were prepared by anti-solvent method (a preparation method of micron-sized ultrafine sodium chloride, patent application number: 200910031335.9), but its size is large (~10um), and the particle size The distribution is wide, so far the same, and only a single shape of the cube shape can be obtained
[0009] In 2011, it was reported that a single-sided funnel-shaped hollow collective particle of sodium chloride was prepared, but it was an aggregate of many particles, not a monodisperse small particle, and the size was large, the preparation steps were complicated, and the condition control was harsh (Hopper- Like Single Crystals of Sodium Chloride Grown at the Interface of Metastable Water Droplets, Angew.Chem.Int.Ed.2011, 50, 6044~6047)
[0011] To sum up, at present, the morphology of sodium chloride particles is limited to cubes, and there is hardly any report on monodisperse sodium chloride or other halides with controllable and separable morphology and size, and there is no suggestion that this kind of earth is extremely abundant. The idea of ​​using water-soluble substances as a new template to prepare hollow structures

Method used

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  • Water-soluble sodium halide micro-particles, and preparation method and application thereof
  • Water-soluble sodium halide micro-particles, and preparation method and application thereof
  • Water-soluble sodium halide micro-particles, and preparation method and application thereof

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preparation example Construction

[0087] In the present invention, the water-soluble halide nanoparticle can obtain monodisperse nanoparticle in an extremely simple method, and the preparation method includes, but is not limited to the following steps:

[0088] 1) Two organic solvents A and B are selected. The halide is soluble or easily soluble in solvent A, but insoluble or insoluble in solvent B, and solvent A and B are at least partially soluble. For example, the organic solvent A can be a polyhydric alcohol, such as alcohols such as ethylene glycol, 1,2 propylene glycol, 1,3 propylene glycol, glycerin, 1,2 butanediol, 1,3 butanediol and 1,4 butanediol, Preferred are 1,2 propylene glycol, 1,2 butanediol and glycerin; the organic solvent B can be an organic polar solvent such as alcohol or amide, such as ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol , tert-butanol, n-pentanol, 2-pentanol, n-hexanol, isohexanol and N, N-dimethylformamide, etc., preferably n-propanol, sec-butanol, n-butan...

Embodiment 1

[0111] Embodiment 1: the preparation of rhombic dodecahedral sodium chloride, preparation method comprises the following steps:

[0112] 1) Weigh 5g of sodium chloride (Aladdin, superior grade) and add it to 50ml of 1,2 propylene glycol (Aladdin, superior grade), keep at 100-140°C for 60min, filter off the insoluble part, and obtain saturated sodium chloride solution;

[0113] 2) Prepare another 30ml of isopropanol and add it to a 50ml beaker, and under the condition of magnetic stirring, use a pipette to draw 1ml of the above saturated sodium chloride solution and drop it slowly into the beaker, and sodium chloride crystals will be precipitated in the solution, and keep for 5 minutes for crystallization Reach equilibrium, obtain sodium chloride crystalline precipitation;

[0114] 3) Centrifuge the above reactant solution and remove the supernatant, add an appropriate amount of ethanol, wash it with ultrasonic vibration for 5 minutes, and centrifuge again; repeat the above pr...

Embodiment 2

[0118] Under the same conditions as in Example 1, 0.5 ml of deionized water was added to 50 ml of 1,2 propylene glycol in advance; the obtained sodium chloride particles were analyzed by X-ray diffraction to be a pure crystal phase of sodium chloride, which was observed by a scanning electron microscope. The obtained sodium chloride crystals are similar to figure 1 Monodisperse rhombic dodecahedrons with uniform morphology, but the size is smaller than that of Example 1, and the average particle size is about 1.2 microns.

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Abstract

The invention relates to water-soluble sodium halide micro-particles, and a preparation method an application thereof. The water-soluble sodium halide micro-particles has a sodium-chloride-type crystal structure and at least one morphology and dimension of the following: the particles are cube, rhombic dodecahedron, regular octahedron, sphere or sphere-like shape, hexagonal-shaped petals or hexagonal star-shape, six-sided funnel-shape, octagonal-shaped petals, or nano-wires with three-dimensional size of 50 nanometers to 20 micrometers.

Description

technical field [0001] The invention relates to a halide nanoparticle with a special shape, its preparation method and its application. The nano-particles can be used as a new environment-friendly template for preparing nano-micro hollow structures of various materials. The invention belongs to the field of new materials and their preparation, and can be widely used in controlled release, drug delivery, selective absorption, catalysis and lithium-ion batteries and other fields. Background technique [0002] Substances or compounds with a hollow structure have a small specific gravity and a large specific surface area, and can enclose other substances to achieve protection, slow release or increase catalysis. They have good application prospects in the fields of controlled release, drug delivery, selective absorption and catalysis. Among them, the preparation and application of oxide hollow structures are the most widely used. The method of preparing the oxide hollow struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/04C01D3/10C01F5/30C01F5/36C01F11/24C01F11/34C01C1/16C01B33/12C01G23/053C08G73/04C08L79/02B22F9/24
Inventor 金平实王兵兵纪士东罗宏杰
Owner 江苏先进无机材料研究院
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