Specific size ceramic microparticles using microfluidic chip, its preparation device, preparation method and application

A microfluidic chip, a specific size technology, applied in the direction of granulating raw materials, ceramic molding machines, chemical instruments and methods, etc., can solve the problems of poor microparticle shape and size adjustability, limited materials, and low production efficiency and other issues to achieve the effect of diversification of preparation materials

Active Publication Date: 2022-03-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are traditional methods for preparing non-spherical ceramic microparticles of specific sizes, such as gel injection molding, powder microinjection molding, and microextrusion molding. These methods are highly dependent on the mold, and the shape and size of the microparticles are poorly adjustable. ; In the prior art that also adopts the micro-stereolithography molding method to prepare ceramic microtubes, the production efficiency is low
Fluid lithography based on microfluidics can prepare microparticles of various sizes and shapes, but its materials are limited to transparent properties, and there are still big problems in the preparation of opaque materials.

Method used

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  • Specific size ceramic microparticles using microfluidic chip, its preparation device, preparation method and application
  • Specific size ceramic microparticles using microfluidic chip, its preparation device, preparation method and application
  • Specific size ceramic microparticles using microfluidic chip, its preparation device, preparation method and application

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preparation example Construction

[0039] In a second aspect, the present invention provides a method for preparing ceramic microparticles of a specific size using a microfluidic chip, comprising the following steps:

[0040] Inject photocurable phase fluid into the first channel, and fill the cross forming area;

[0041] Injecting the thermosetting phase fluid into the second channel so that it keeps the cross-sectional shape of the second channel and flows through the cross forming area, and squeezes part of the light curing fluid in the cross forming area into the downstream of the second channel;

[0042] Irradiating ultraviolet light to the cross forming area, the photo-curing phase fluid undergoes a polymerization reaction and then solidifies, forming inverted "concave" micro-particles to wrap the heat-curing phase;

[0043] Continue to inject the light-cured phase fluid into the first channel, push out the light-cured particles, and repeat the above steps;

[0044] When the light-cured particles are pus...

Embodiment 1

[0067] A device for preparing alumina microparticles of fixed size based on a microfluidic chip, including a microfluidic channel, a heating copper ring, and a microscope ultraviolet light system. The microfluidic channel is formed by two straight channels crossed in a cross, which are the first channel and the second channel respectively. Two channels. The height of the first channel is higher than that of the second channel. According to the flow direction of the heat-cured phase and the light-cured phase, one end of the two channels is the feeding area, the intersection part is the molding area, and the other end is the heating and curing area. A microscope ultraviolet optical path system is set above the cross molding area, and a certain shape of ultraviolet light spot is projected to this area to cure and form the thermally cured phase. In the heating and curing area, a copper ring is arranged in close contact with the heater, and the channel is heated to cure the slurry...

Embodiment 2

[0070] Preparation of alumina nano-dispersion: Weigh 17g of alumina powder, 0.17g of ammonium citrate and 5g of deionized water, mix them and mill them in a planetary ball mill at 450 rpm for 24 hours to obtain a volume ratio of alumina powder of 50% alumina dispersion.

[0071] Preparation of the thermal curing phase: Weigh 0.68g of acrylamide, 0.068g of N,N'-methylenebisacrylamide and the aluminum oxide nano-dispersion described in step 1 of this example, mix them, and vortex for 5 minutes to obtain a ceramic slurry material. Take 500 μL of ceramic slurry, add 15 mg of ammonium persulfate, and vortex for 1 minute to obtain a thermally cured phase.

[0072] Photocurable phase fluid preparation: Weigh 1 mL of ETPTA and add 40 μL of photoinitiator, shake for 2 minutes to obtain the photocurable phase.

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Abstract

The invention discloses ceramic microparticles of a specific size using a microfluidic chip, its preparation device, preparation method and application, and the preparation device includes: a first channel and a second channel arranged in a "ten" cross connection, forming a cross In the molding area, a photocuring light source is arranged above the intersection, and the axis of the first channel is set on the upper side of the axis of the second channel; the first copper ring is set at the outlet end of the first channel; the second copper ring is set on the The outlet end of the second channel; the first copper ring and the second copper ring are respectively used for connecting with the heating device. The ceramic microparticle green body prepared based on the microfluidic chip reactor in the present invention has a non-spherical shape with a determined three-dimensional size, and its size is determined by the cross-sectional size of the two channels crossed by a "cross". By preparing different cross-sectional sizes and shapes PDMS microchannels can realize the preparation of microparticles with different three-dimensional sizes.

Description

technical field [0001] The invention belongs to the technical field of ceramic microparticle preparation, and in particular relates to a ceramic microparticle with a specific size using a microfluidic chip, a preparation device, a preparation method and an application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In recent years, ceramic materials have become a substitute for various metals or alloys in the industrial field. They have good high temperature resistance, wear resistance, chemical corrosion resistance and excellent mechanical properties. Ceramic microparticles not only have the general properties of ceramic materials, but also conform to the develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/00B28B3/20B28B11/24B01J2/00B01J2/20C04B35/10C04B35/634
CPCB28B1/004B28B3/20B28B11/243B01J2/00B01J2/20C04B35/10C04B35/6344C04B2235/6562C04B2235/6567
Inventor 满佳周晨晨武敏夏荷于海博满录明祁斌李剑峰
Owner SHANDONG UNIV
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