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Composite material containing ordered microsphere array and preparation method of composite material

A composite material and microsphere array technology, which is applied in the coupling of optical waveguides, metal material coating process, nanotechnology for materials and surface science, etc. It is difficult to control the distance between microspheres and microspheres, and it is difficult to achieve orderly arrangement of microspheres.

Pending Publication Date: 2020-11-20
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] At present, composite materials containing two-dimensional microsphere arrays are usually prepared by self-assembly method, which mainly uses the surface active groups of the microspheres or the use of surfactants to realize the regular arrangement of the microspheres. It is difficult to control the distance between microspheres, and it is only suitable for the self-assembly of microspheres with small particle size (below 1 μm). It is difficult to achieve orderly arrangement of microspheres with large volume and weight, and it is difficult to prepare large-area ordered microsphere arrays. When composite materials are used, the uniformity is difficult to guarantee, which will have a negative impact on the performance of composite materials.
At present, composite materials containing three-dimensional microsphere arrays are usually prepared by gravity sedimentation, electrophoresis-assisted sedimentation, or centrifugal force sedimentation. The arrangement of the microspheres and the distance between the microspheres are difficult to control. In addition, these methods are mainly used to prepare small volume (1cm) in the laboratory. 3 Below) samples, the uniformity of the microspheres is difficult to transfer when preparing large-volume samples

Method used

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  • Composite material containing ordered microsphere array and preparation method of composite material
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  • Composite material containing ordered microsphere array and preparation method of composite material

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preparation example Construction

[0024] The invention provides a method for preparing a composite material containing an ordered microsphere array, comprising the following steps:

[0025] providing a mixed slurry comprising microspheres and a binder;

[0026] A screen is provided, the aperture of the mesh on the screen is 0.1-10% larger than the particle diameter of the microspheres, and the arrangement and spacing of the meshes match the ordered microsphere array;

[0027] Spread the screen on the upper surface of the substrate, then pour the mixed slurry on the screen, and use a scraper to scrape the mixed slurry into the mesh of the screen based on the screen printing method, so that The microspheres in the mixed slurry are distributed in an array in the mesh of the screen, and the screen is removed after the surface is dry, which is recorded as one printing process;

[0028] The printing process is repeated n times, and then the substrate is peeled off to obtain a composite material containing an ordere...

Embodiment 1

[0042] SiO with a particle size of 1 μm 2 The microspheres and the silicone resin are uniformly mixed in a volume ratio of 6:4 to obtain a mixed slurry;

[0043] Spread the wire mesh (with a pore size of 1.10 μm, made of stainless steel) on the upper surface of the polycarbonate (PC) plate, pour the mixed slurry onto the wire mesh, and scrape the mixed slurry with a scraper. into the mesh of the screen, so that the microspheres in the mixed slurry are distributed in an array in the mesh of the screen, take off the screen after surface drying, and cut and remove the C plate after it is completely dry to obtain a two-dimensional The composite material of the microsphere array, the distance between the microspheres is 0.2 μm.

[0044] The hydrophobicity of the composite material prepared in this embodiment is tested, and the results show that the contact angle of water droplets is 160°; 2 The microspheres are randomly arranged and the contact angle is only 104°.

Embodiment 2

[0046] Fe with a particle size of 100 μm 3 o 4 The microspheres and the epoxy resin are uniformly mixed in a volume ratio of 7:3 to obtain a mixed slurry;

[0047] Spread the wire mesh (with a pore size of 105 μm, made of nylon) on the upper surface of the polyvinyl chloride (PVC) board, pour the mixed slurry onto the wire mesh, and use a scraper to scrape the mixed slurry into the In the holes of the screen, the microspheres in the mixed slurry are distributed in an array in the mesh holes of the screen, the screen is removed after the surface is dry, and the PVC sheet is cut and removed after being completely dry to obtain a two-dimensional microsphere-containing Array of composite materials with a microsphere pitch of 0.1 μm.

[0048] image 3 The microstructure diagram of the composite material (containing PVC sheet) containing two-dimensional microsphere array prepared for this embodiment, by image 3 It can be seen that Fe 3 o 4 The microspheres are evenly distribu...

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Abstract

The invention provides a composite material containing an ordered microsphere array and a preparation method of the composite material, and belongs to the technical field of functional material preparation. On the basis of a silk-screen printing method, regular silk-screen meshes are filled with microspheres through a scraper blade, and the ordered microsphere array can be obtained after a silk screen is removed. According to the preparation method, regular arrangement of the microspheres is realized by utilizing meshes of the silk screen, the arrangement mode of the microspheres is controllable, the particle size range of the applicable microspheres is large, regular arrangement of larger microspheres can be realized, the operation is simple, the cost is low, the efficiency is high, and the preparation method is suitable for preparation of a large-area two-dimensional microsphere array and a large-volume three-dimensional microsphere array. In the composite material prepared by the method provided by the invention, the array formed by regularly arranging the microspheres can enhance the functionality of the material, and can be applied to the fields of electromagnetic shielding, radiation shielding, catalysis, light filtering and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a composite material containing ordered microsphere arrays and a preparation method thereof. Background technique [0002] In composite materials containing ordered microsphere arrays, the microspheres are usually distributed in the form of two-dimensional arrays or three-dimensional arrays. This type of composite material has many characteristics. Shielding, radiation shielding and other fields have broad application prospects. [0003] At present, composite materials containing two-dimensional microsphere arrays are usually prepared by self-assembly method, which mainly uses the surface active groups of the microspheres or the use of surfactants to realize the regular arrangement of the microspheres. It is difficult to control the distance between microspheres, and it is only suitable for the self-assembly of microspheres with small particle size (b...

Claims

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Application Information

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IPC IPC(8): B81B7/04B81C1/00B82Y30/00B82Y40/00
CPCB81B7/04B81C1/00031B81C1/00373B82Y30/00B82Y40/00B81B2207/056
Inventor 颜家振商佳程刘文博李宁吕俊男潘小强
Owner SICHUAN UNIV
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