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Three-dimensional (3D) printing method of micro-nano structure based on near-field electrostatic spinning

A micro-nano structure and near-field electrostatic technology, which is applied in the field of micro-nano manufacturing and additive manufacturing, can solve the problems that it is difficult to manufacture three-dimensional solid parts and limit the popularization and application of 3D printing technology, so as to achieve low cost, improve forming accuracy, expand Effect of material selection range

Active Publication Date: 2014-03-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing 3D printing methods are either limited to specific forming materials, or require expensive equipment (lasers), and more importantly, it is difficult to manufacture three-dimensional solid parts with micro-nano structures, which greatly limits 3D printing. Popularization and application of technology, especially in the field of micro-nano manufacturing technology

Method used

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  • Three-dimensional (3D) printing method of micro-nano structure based on near-field electrostatic spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] When preparing the liquid materials used in the preparation of micro-nano structures by the 3D printing method based on near-field electrospinning, take N,N-dimethylformamide and acetone at a volume ratio of 1:1, and N,N-dimethylformamide The mixture of methyl formamide and acetone press is used as a solvent, and polylactic acid-polyglycolic acid (PLGA) is dissolved in the solvent to form a PLGA solution with a mass fraction of 15%. When preparing micro-nano structures, the PLGA solution is used as a liquid material.

[0031] The 3D printing method of the micro-nano structure based on near-field electrospinning comprises the following steps:

[0032] 1) Use computer-aided design software to design a three-dimensional part model with a micro-nano structure, and then perform layered processing on the three-dimensional part model, with a layer thickness of 0.01mm, so as to form the contour data and filling data of each layered section of the three-dimensional part model ; ...

Embodiment 2

[0038] Isotactic polypropylene particles were heated and melted at 282 °C to prepare liquid materials required for a near-field electrospinning-based 3D printing method.

[0039] The 3D printing method of the micro-nano structure based on near-field electrospinning comprises the following steps:

[0040] 1) Use computer-aided design software to design a three-dimensional part model with a micro-nano structure, and then perform layered processing on the three-dimensional part model, with a layer thickness of 0.01mm, so as to obtain the contour data and filling data of each layered section of the three-dimensional part model ;

[0041] 2) Put the prepared liquid material into the precision extrusion syringe pump, heat the syringe pump to 282°C, control the extrusion speed of the liquid material to 0.4ml / h, and connect the extrusion nozzle to the positive pole of the DC high voltage generator , adjust the output voltage of the direct high-voltage generator to 0.5kV, and ground the...

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Abstract

The invention discloses a three-dimensional (3D) printing method of a micro-nano structure based on near-field electrostatic spinning. According to the method, a layered manufacturing principle of a 3D printing technology is combined with a near-field electrostatic spinning droplet or micro-nano fiber filament forming control technology. The method comprises the following steps: firstly, designing a part model through a computer, and processing contour data and padding data of the model to obtain relative movement data of a spray nozzle and a receiving platform; secondly, preparing micro-nano liquid flow or micro-nano fiber filaments from material liquid by controlling factors such as voltage, receiving distance, flow speed, temperature and humidity; thirdly, orderly stacking the micro-nano liquid flow or the micro-nano fiber filaments through the relative movement of the spray nozzle and the receiving platform; and finally, performing layered manufacturing and layer-by-layer stacking to further form and manufacture the micro-nano structure. According to the method, the micro-nano structure can be quickly manufactured in a multi-material and low-cost manner.

Description

technical field [0001] The invention relates to the technical field of micro-nano manufacturing and additive manufacturing, in particular to a 3D printing method of a micro-nano structure based on near-field electrospinning. Background technique [0002] 3D printing directly uses the three-dimensional model designed by the computer, without the need for tools and molds, and quickly realizes the manufacture of complex parts through the layered discrete and accumulation process from point to line, from line to surface, and from surface to volume. The British "Economist" magazine believes that 3D printing technology, together with other digital production models, will promote and realize the third industrial revolution. At present, there are various commercialized 3D printing methods and equipment on the market, including photocuring, fused deposition, and selective laser sintering. However, the existing 3D printing methods are either limited to specific forming materials, or ...

Claims

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Application Information

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IPC IPC(8): B29C67/00
Inventor 贺健康李涤尘秦霆刘亚雄靳忠民徐方远
Owner XI AN JIAOTONG UNIV
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