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Melamine resin hollow microspheres and preparation method and application thereof

A technology of melamine resin and microspheres, which is applied in the direction of microsphere preparation, microcapsule preparations, chemical instruments and methods, etc., can solve the problem that the thickness and phase composition of hollow spherical shells are difficult to effectively and precisely control, the particle size of spheres is difficult to control, and there is no Industrialized products and other problems, to achieve the effect of low cost, good hollowness and short reaction time

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the 21st century, researchers at home and abroad have conducted a lot of research and reports on polymer hollow microsphere materials, but overall, due to the cumbersome preparation process of polymer hollow microspheres, the difficulty in controlling the particle size of the spheres, and the hollow spherical shell Thickness and phase composition are difficult to control effectively and precisely. At present, most of them are limited to the laboratory research stage, and there are no mature industrial products.
This method realizes the dispersion and reaction of droplets in the solution, but the disadvantage is that the yield is low, the time used is long, the product needs to be filtered and dried, and waste liquid is generated.

Method used

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  • Melamine resin hollow microspheres and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Adjust the melamine resin prepolymer to a solid content of 10%wt, weigh the 1000g liquid containing 10%wt solid content, adjust the pH value to 6 with acetic acid, and stir evenly to obtain a slurry;

[0043] (2) Start the spray drying equipment, set the inlet temperature parameter as 160°C, the cyclone wind speed as 800 l / h, and the cyclone air volume as 100%, so that the temperature field of the equipment is constant and uniform, and the air flow is stable; the speed of the volume pump is adjusted to 10mL / min , the uniformly dispersed slurry is evenly sprayed under the working chamber, and the slurry is dried instantly to become hollow microspheres, and the microspheres are respectively collected in the material receiver, bag filter and tower bottom under the drive of the air-inducing device; measured The obtained melamine resin hollow microspheres have a particle diameter of 60-100 μm and a density of 0.78 g / cm 3 .

Embodiment 2

[0045] (1) Adjust the melamine resin prepolymer to a solid content of 15%wt, weigh 1000g of the liquid, adjust the pH to 6 with acetic acid, add 5g of ammonium bicarbonate, 2.5g of ammonia, and 0.12g of dodecylbenzenesulfonic acid Sodium, stir evenly to obtain slurry;

[0046] (2) Start the spray drying equipment, set the inlet temperature parameter as 200°C, the cyclone wind speed as 700 l / h, and the cyclone air volume as 100%, so that the temperature field of the equipment is constant and uniform, and the air flow is stable; the speed of the volume pump is adjusted to 15mL / min , the uniformly dispersed slurry is evenly sprayed under the working chamber, and the slurry is dried instantly to become hollow microspheres, and the microspheres are respectively collected in the material receiver, bag filter and tower bottom under the drive of the air-inducing device; measured The obtained melamine resin hollow microspheres have a particle diameter of 80-130 μm and a density of 0.63...

Embodiment 3

[0048] (1) Adjust the melamine resin prepolymer to a solid content of 20%wt, weigh 1000g of the liquid, adjust the pH to 4 with hydrochloric acid, add 20g of urea, 0.12g of sodium dodecylbenzenesulfonate, and stir evenly to obtain a slurry ;

[0049] (2) Start the spray drying equipment, set the inlet temperature parameter as 250°C, the cyclone wind speed as 500l / h, and the cyclone air volume as 100%, so that the temperature field of the equipment is constant and uniform, and the air flow is stable; the speed of the volume pump is adjusted to 20mL / min , the uniformly dispersed slurry is evenly sprayed under the working chamber, and the slurry is dried instantly to become hollow microspheres, and the microspheres are respectively collected in the material receiver, bag filter and tower bottom under the drive of the air-inducing device; measured The obtained melamine resin hollow microspheres have a particle diameter of 90-140 μm and a density of 0.45 g / cm 3 .

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Abstract

The invention relates to melamine resin hollow microspheres and a preparation method and application thereof in the field of materials. The particle size range of the melamine resin hollow microspheres is 5-140 (mu)m, and the density is 0.21-1.20 g / cm(3). The preparation method of the melamine resin hollow microspheres comprises the following steps: adjusting the concentration of melamine resin prepolymer to be a certain value; and forming cavities in the melamine resin hollow microspheres by using spray drying equipment and under the combined action of rapid volatilization of an aqueous solution and gas produced by a foaming agent. The melamine resin hollow microspheres are prepared by the method. The method is simple and practicable, the reaction time is short, industrialization is facilitated, the cost is low, and the prepared hollow microspheres are smooth in surface and good in degree of hollowness.

Description

technical field [0001] The invention relates to a hollow microsphere in the field of materials, and more particularly, relates to a melamine resin hollow microsphere and a preparation method and application thereof. Background technique [0002] Hollow microsphere materials have unique physical and chemical properties due to their special hollow structure. In recent years, they have attracted more and more attention and become a research hotspot in the field of materials. So far, inorganic materials, polymer materials, metal oxide materials and semiconductor materials (gallium oxide, gallium nitride) have all been tried to be prepared into hollow microsphere materials by researchers at home and abroad. Special features of different materials. These hollow microsphere materials with special characteristics are expected to be used in microreactors, drug delivery, controlled release, photocatalysis, enzyme coating, photonic crystals, etc. In addition, due to the low density, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04C08G12/32C08J9/08C08J9/10C09K8/035
Inventor 赵素丽石秉忠王建宇陈铖刘金华唐文泉
Owner CHINA PETROLEUM & CHEM CORP
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