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Device and method for realizing three-dimensional printing micro-nano structure by utilizing alternating-current electrospining

A technology of three-dimensional printing and micro-nano structure, which is applied in the direction of additive processing, etc., can solve the problems of electric field distribution influence, influence jet formation and fiber deposition, etc., to increase thickness, avoid changes in electric field distribution, improve deposition accuracy and deposition thickness Effect

Inactive Publication Date: 2016-12-07
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the spinning time increases, the fibers deposited on the receiver plate accumulate, which seriously affects the electric field distribution, which in turn affects the jet formation and further deposition of fibers

Method used

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  • Device and method for realizing three-dimensional printing micro-nano structure by utilizing alternating-current electrospining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Draw the 3D model of the pre-printed microstructure, and do layering processing, so that the thickness of each layer is 0.02mm, obtain the layered information of the pre-printed microstructure, and import it into the motion control system to make it receive the motion path of the board and Hierarchical information is consistent.

[0036] 2) Put polycaprolactone granules into a glass syringe with a stainless steel needle and heat to 150°C to melt it, keep it warm for more than 4 hours and remove air bubbles, place it on a bolus injection pump, and adjust the bolus injection rate to 0.9ml / h; The two ends of the AC high-voltage power supply are respectively connected to the needle head and the receiving board. Adjust the AC high-voltage power supply to make the output a sine wave, the effective output voltage is 5kV, and the frequency is 50Hz, so that an alternating high-voltage electric field is formed between the needle head and the receiving board. ; Adjust the dista...

Embodiment 2

[0039] 1) Draw the 3D model of the pre-printed microstructure, and do layering processing, so that the thickness of each layer is 0.02mm, obtain the layered information of the pre-printed microstructure, and import it into the motion control system to make it receive the motion path of the board and Hierarchical information is consistent.

[0040]2) Polycaprolactone can be dissolved in hexafluoroisopropanol to form a 15% solution, the solution is sucked into a 10ml syringe, placed on the injection pump, and the injection rate is adjusted to 0.4mm / min; The two ends of the power supply are respectively connected to the needle head and the receiving board, adjust the AC high-voltage power supply to make the output a sine wave, the effective output voltage is 3kV, and the frequency is 100Hz, so that an alternating high-voltage electric field is formed between the needle head and the receiving board; adjust The distance between the receiving plate and the needle is 3mm, so that the...

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Abstract

The invention provides a device and a method for realizing a three-dimensional printing micro-nano structure by utilizing alternating-current electrospining. The method comprises the following steps of: putting printing raw materials into an injecting system, and forming spherical liquid drops of the printing raw materials at a needle head; applying alternating-current high-voltage electricity to the needle head and a receiving plate, and forming alternating high-voltage electric fields between the needle head and the receiving plate, enabling the printing raw materials to form single jet flow under the action of the alternating high-voltage electric fields, and depositing the single jet flow on the receiving plate to form micro-nano fibers; enabling the temperature of the receiving plate to be stabilized to be lower than a smelting point of the printing raw materials, and curing micro-nano fibers; controlling the receiving plate to move, thereby obtaining layered sections of a three-dimensional model; and sequentially scanning each layer of the three-dimensional model to complete printing of the three-dimensional model. The method can effectively improve three-dimensional printing precision.

Description

technical field [0001] The invention relates to a device and method for three-dimensionally printing micro-nano structures, belonging to the technical field of rapid prototyping. Background technique [0002] 3D printing technology is a rapid prototyping technology that constructs objects by layer-by-layer printing. Engineering plastics are the most widely used 3D printing materials. The printing method is basically to print layer by layer by extruding raw materials. However, due to the limitation of the nozzle diameter and the expansion effect of the fibers after extrusion, extrusion The diameter of the fibers produced is relatively thick, resulting in poor accuracy of the three-dimensional structure formed by this accumulation, which cannot meet the printing requirements of micro-nano structures. [0003] Electrospinning is one of the simplest and most convenient methods for preparing micro / nanofibers, and is favored by researchers in various fields because of its simple ...

Claims

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Application Information

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IPC IPC(8): B29C67/00B33Y30/00B33Y10/00
CPCB33Y30/00B33Y10/00
Inventor 尹大川何凤利柳洋阳李大为何进刘雅丽
Owner NORTHWESTERN POLYTECHNICAL UNIV
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