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Method for improving interface strength of 3D printed piece

An interface strength, 3D printing technology, applied in the field of 3D printing, can solve the problems of difficulty in meeting actual use requirements, performance degradation, weak layer-to-layer adhesion, etc., to improve mechanical properties, improve performance, and enhance interlayer adhesion. Effect

Active Publication Date: 2021-03-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inherent layer-by-layer processing method of 3D printing technology makes the bonding force between layers weak and prone to defects. Compared with traditional processing parts, the performance is significantly lower, and it is difficult to meet the actual use needs.

Method used

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  • Method for improving interface strength of 3D printed piece
  • Method for improving interface strength of 3D printed piece
  • Method for improving interface strength of 3D printed piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for enhancing the performance of digital light processing 3D printing parts, comprising the following steps:

[0041] 1) The monomer of photosensitive resin: 100g hydroxyethyl acrylate, crosslinking agent: 5g hexanediol diacrylate, photoinitiator: 0.5g camphorquinone, and polymerization inhibitor: 0.1g hydroquinone are mixed evenly, Stir magnetically at room temperature for 20 minutes at a rotational speed of 500 rpm to obtain a photosensitive resin solution;

[0042] 2) Add functional components (1g zinc chloride) and nanoparticles (0.5g graphene) into the photosensitive resin solution obtained in step 1) at a rotating speed of 500rpm, and continue stirring for 1h to obtain a photosensitive resin composite dispersion;

[0043] 3) The resin composite dispersion obtained in step 2) is subjected to digital light processing 3D printing, the laser wavelength is 445nm, the thickness of each layer is controlled to 80 μm, and the curing time of each layer is controlle...

Embodiment 2

[0047] A method for enhancing the performance of digital light processing 3D printing parts, comprising the following steps:

[0048] 1) The monomer of photosensitive resin: 100g hydroxyethyl acrylate, crosslinking agent: 5g hexanediol diacrylate, photoinitiator: 0.5g camphorquinone, and polymerization inhibitor: 0.1g hydroquinone are mixed evenly, Stir magnetically at room temperature for 20 minutes at a rotational speed of 500 rpm to obtain a photosensitive resin solution;

[0049] 2) Add the functional components (1g of zinc acrylate) and nanoparticles (0.5g of graphene) into the photosensitive resin solution obtained in step 1) at a rotational speed of 500rpm, and continue stirring for 1h to obtain a photosensitive resin composite dispersion;

[0050] 3) The resin composite dispersion obtained in step 2) is subjected to digital light processing 3D printing, the laser wavelength is 445nm, the thickness of each layer is controlled to 80 μm, and the curing time of each layer ...

Embodiment 3

[0053] A method for enhancing the performance of direct writing 3D printing parts, comprising the following steps:

[0054] 1) Dissolve the polymer powder material (10g polyvinyl alcohol) in the solvent (100ml deionized water), the stirring speed is 500rpm, and the dissolution temperature is controlled at 60°C;

[0055] 2) Add functional components (1g zinc chloride) and nanoparticles (0.5g nano-silicon dioxide) to the solution obtained in step 1) at a speed of 500rpm, and continue stirring for 1h to obtain a composite dispersion;

[0056] 3) Perform direct writing 3D printing on the dispersion liquid obtained in step 2). The diameter of the printing head is 70 μm, and the printing speed is 10 mm / s. After the printing is completed, a 3D printed part can be obtained.

[0057] Step 3) The printed part obtained is placed in an oven at 50° C. for 2 hours for heat treatment, and the reinforced printed part can be obtained.

[0058] image 3 It is the stress-strain curve before an...

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Abstract

The invention discloses a method for improving the interface strength of a 3D printed piece. The method comprises the following steps: (1) introducing a functional monomer into a 3D printing materialsystem, and carrying out 3D printing to obtain a printed piece; and (2) activating the printed piece obtained in the step (1) to improve the interface strength of the printed piece, wherein the mode of introducing the functional monomer into the material system is that the functional monomer is blended with other materials in the system, the other materials comprise a polymer, the material of thepolymer contains at least one selected from the group consisting of oxygen, nitrogen, sulfur, boron and phosphorus, the functional monomer is a compound with an MxRy structure, M is selected from metal ions, and R is selected from anions. According to the method, the functional monomer is introduced into the 3D printing material system, and the piece is activated after 3D printing is completed, sothe interlayer bonding force of the 3D printed piece can be enhanced, and the performance of the 3D printed piece is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for improving the interface strength of 3D printing parts. Background technique [0002] 3D printing, also known as additive manufacturing, is a technology that uses computer-controlled layers of materials to create solid parts. Compared with traditional processing technology, 3D printing technology does not require traditional multi-processing processes, and can quickly manufacture parts with complex structures, greatly reducing processing steps and shortening the processing cycle. The more complex the structure of the part, the more significant the processing efficiency . Because of its high efficiency and high precision, 3D printing technology has been widely used in aerospace, medical, art design and many other fields. However, the inherent layer-by-layer processing method of 3D printing technology makes the bonding force between layers weak, prone ...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08L33/14C08L29/04C08L67/04C08L33/12C08K3/16C08K3/04C08K5/098C08K3/36C08K3/34B29C64/379B33Y40/20
CPCC08J7/08C08J7/00B29C64/379B33Y40/00C08J2333/14C08J2329/04C08J2367/04C08J2333/12C08K2201/011C08K2003/168C08K3/042C08K3/36C08K3/16C08K3/346Y02P10/25
Inventor 朱光达侯仪赵宁徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI