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Preparation method of hollow glass beads

A technology of hollow glass microspheres and schemes, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of high production cost, poor particle size controllability, complicated steps, etc., and achieve low cost and enhanced mechanical properties , The effect of simple preparation process

Active Publication Date: 2017-11-17
张振
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is to provide a convenient preparation method of hollow glass microspheres, which has simple steps, convenient operation, adjustable particle size, reaction at room temperature, and low cost, which overcomes the disadvantages of existing preparation methods. The steps are complicated, the production cost is high, the particle size controllability is poor, and high temperature is often required.

Method used

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  • Preparation method of hollow glass beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Using the oil-in-water Pickering emulsion of hydrophilic nanocellulose emulsification as a template, the specific examples of preparing hollow glass microspheres are as follows:

[0033] The pH value of the water was adjusted to 2.0, and then the hydrophilic nanocellulose was dispersed in said pH 2.0 water, and sodium chloride was added as the aqueous phase A of the Pickering emulsion.

[0034] Mix toluene and methyl orthosilicate at a ratio of 1:1 by volume as the oil phase B of the Pickering emulsion.

[0035] The above water phase A and oil phase B were mixed according to the volume ratio of 7:3, and then ultrasonicated for 2 minutes to obtain the Pickering emulsion. The aforementioned Pickering emulsion was allowed to stand at room temperature for 5 days, washed with acetone or ethanol and then dried to obtain hollow glass microspheres. The size of the hollow glass microspheres can be adjusted by the concentration of sodium chloride, the concentration of nanocellul...

Embodiment 2

[0043] This example studies the influence of different silica precursors, pH values ​​and organic phase solvents on hollow glass microspheres.

[0044] The hydrophilic nanocellulose was dispersed in water with a certain pH value, and sodium chloride was added as the aqueous phase A of the Pickering emulsion.

[0045] The oil phase solvent and the silica precursor were mixed at a volume ratio of 1:1 as the oil phase B of the Pickering emulsion.

[0046] The above-mentioned water phase A and oil phase B were mixed according to the volume ratio of 7:3, and the Pickering emulsion was obtained after ultrasonication for 2 minutes. The aforementioned Pickering emulsion was allowed to stand at room temperature for 5 days, washed with acetone or ethanol and then dried to obtain hollow glass microspheres.

[0047] The summary of each test parameter and test result is as follows:

[0048]

[0049]

[0050]

[0051] The methyl orthosilicate in Example 1 can be replaced by other...

Embodiment 3

[0057] Using the water-in-oil Pickering emulsion emulsified by hydrophobic nanocellulose as a template, the specific examples of preparing hollow glass microspheres are as follows:

[0058] Firstly, the hydrophilic nanocellulose is hydrophobically modified, and the modified hydrophobic nanocellulose can be prepared by introducing a hydrophobic matrix onto the nanocellulose by means of small molecule reaction or polymer grafting. In this example, butyryl chloride was used to hydrophobically modify nanocellulose. Disperse 1 gram of nanocellulose into 100 milliliters of dimethylformamide, add 1 milliliter of triethylamine, 1 gram of 4-dimethylaminopyridine and 1 gram of butyryl chloride, and react at room temperature for 24 hours to obtain hydrophobic modification of nanocellulose.

[0059] The above-mentioned hydrophobically modified fiber nanocrystals were dispersed into an oily solvent, and the silica precursor methyl orthosilicate was added as the oil phase A of the Pickerin...

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Abstract

The invention relates to a preparation method of hollow glass beads. The preparation method comprises the following steps of: by taking nano cellulose as a Pickering emulsion, adding a precursor of silicon dioxide into an oil phase of the emulsion; and by taking the Pickering emulsion as a template, performing a sol-gel reaction on the precursor of silicon dioxide under an acidic or alkaline condition to prepare the hollow glass beads. The preparation method provided by the invention is simple and convenient, the particle sizes can be regulated, the preparation method can be performed at room temperature, and the cost of preparing the hollow glass beads is lowered.

Description

technical field [0001] The invention relates to the field of material preparation and application, in particular to a preparation method of hollow glass microspheres. Background technique [0002] Hollow glass microspheres are hollow glass spheres in the micron range. Usually the particle size is between 10-200 microns, and the bulk density is 0.1-0.5g / cm 3 . Due to the unique component composition and structure, hollow glass microspheres have the advantages of light weight, low thermal conductivity, sound insulation, good dispersion, good insulation and thermal stability, etc., and are newly developed as a widely used and excellent performance new material. [0003] Hollow glass beads have the following advantages: (1) The color is white, and can be widely used in materials or products that require appearance; (2) The density is small, due to the hollow structure of glass beads, its density is very small, and it is a traditional filling material. A fraction of the densi...

Claims

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Application Information

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IPC IPC(8): C01B33/18C03C11/00C03B19/10
CPCC01B33/18C01P2004/02C01P2004/03C01P2004/34C01P2004/51C01P2004/61C01P2006/66C03B19/107C03C11/002
Inventor 张振张学振宾红领张旭
Owner 张振
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