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A method for preparing an anti-adhesion film for photocuring continuous surface molding 3D printing

A 3D printing and anti-adhesion technology, applied in the field of 3D printing, can solve the problems of high price, high equipment requirements, and oxygen consumption

Active Publication Date: 2021-04-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some limitations due to the CLIP technology:
[0003] (1) The molding window of the CLIP process needs to use oxygen-permeable and UV-permeable film materials, which are relatively expensive, and the printing process requires continuous consumption of oxygen, which requires high equipment;
[0004] (2) Since the continuous molding is mainly based on the principle of "oxygen inhibition", the resin needs to have an oxygen inhibition effect, which limits the materials used;
[0005] (3) Due to the existence of oxygen inhibition, there will be hundreds of microns of uncured resin on the surface of the part, which will affect the performance and accuracy of the part

Method used

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  • A method for preparing an anti-adhesion film for photocuring continuous surface molding 3D printing
  • A method for preparing an anti-adhesion film for photocuring continuous surface molding 3D printing
  • A method for preparing an anti-adhesion film for photocuring continuous surface molding 3D printing

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preparation example Construction

[0027] A method for preparing an anti-adhesion film for photocuring continuous surface forming 3D printing, characterized in that it comprises the following steps:

[0028] Step 1: Use fluorosilane coupling agent to fluorinate the base material, soak the base material in liquid oleophobic material, and soak for 0-2400 hours with the help of ultrasonic vibration, heating or microwave treatment, or by Coating method, so that the oleophobic material adheres to the base material;

[0029] Step 2, using an organic solvent to remove excess liquid oleophobic material to obtain an adhesive film material.

[0030] The matrix material is a light-transmitting porous organic polymer film material, a low-density organic polymer film material or an organic polymer film material with a microstructure.

[0031] The matrix material is porous polyperfluoroethylene film, polytetrafluoroethylene nuclear hole film, ultra-low density polyethylene film, medium density polyethylene film, linear low ...

Embodiment 1

[0041] The polyperfluoroethylene porous film with a backing layer is used as the substrate 1, and the perfluoropolyether lubricating oil is used as the oleophobic phase 2. The surface of the film is cleaned with acetone and deionized water respectively, and then the surface is blown dry with nitrogen. Soak the film in perfluoropolyether lubricating oil and let it stand for 24 hours. Then the film is taken out, excess perfluoropolyether lubricating oil is washed away with acetone, and the surface of the film is blown dry with nitrogen to obtain an anti-adhesion film material. Such as Figure 4 As shown, when printing, the anti-adhesion film material is pasted on the bottom of the resin tank 5, and the photosensitive resin 7 is cured under the action of UV light and bonded to the molding board 3. Since there is a gap between the molding part 6 and the base material 1 layer of liquid oleophobic phase 2, the solid-solid bond between the molded part 6 and the substrate 1 is transf...

Embodiment 2

[0043] combine figure 2, with a microstructured PDMS film as the substrate 1, perfluoropolyether lubricating oil as the oleophobic phase 2, and per(heptadecane) fluorodecyltrimethoxysilane as the silane coupling agent. The surface of the PDMS film was cleaned with acetone and deionized water, respectively, and the surface was blown dry with nitrogen, and then the surface of the PDMS film was treated with oxygen plasma. Then the PDMS film was soaked in per(heptadecane)fluorodecyltrimethoxysilane, and left to stand in a vacuum environment for 8 hours to perform fluorination treatment. The excess per(17)fluorodecyltrimethoxysilane on the PDMS film was removed with acetone, washed with deionized water, and dried with nitrogen. Then, by immersion coating method, the PDMS film was soaked in perfluoropolyether lubricating oil, and placed in a vacuum environment for 24 hours. Then take out the film, wash off excess perfluoropolyether lubricating oil with acetone, then clean with de...

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Abstract

A method for preparing an anti-adhesion film for photocuring continuous surface molding 3D printing. Soak the fluorinated porous material that is transparent to ultraviolet light in a fluorinated liquid or fluorine-containing nano-scale lubricating oil, and after a period of time, the fluorinated liquid or fluorine-containing nano-scale lubricating oil can fully infiltrate the interior of the porous material, and then Use organic solvents to remove excess fluorinated liquid or fluorine-containing nano-scale lubricating oil. Using the chemical compatibility of the porous material and the oleophobic phase and the capillary action of the porous material, a stable micron-sized liquid film is formed on the surface of the porous material, and the "solid bond" between the molded part and the light-transmitting porous film material "Transform into a "solid-liquid bond" between the molded part and the liquid oleophobic phase, separate the molded part from the porous material, reduce the adhesion between them, so that the printing process can be carried out continuously, the preparation method is low cost and simple fast.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for preparing an anti-adhesion film used for photocuring continuous surface forming 3D printing. Background technique [0002] Stereo lithography apparatus (SLA) is the earliest developed and currently one of the more mature additive manufacturing technologies. After years of development, the traditional light-curing rapid prototyping technology has transitioned from the "point-to-line, line-to-surface, surface-to-body" SLA molding method to the current "surface-to-body" DLP molding method directly. The cohesion between the films is relatively large, which limits the molding speed and precision of DLP. In recent years, the "continuous liquid interface manufacturing technology" (CLIP) developed by Carbon3D in the United States uses the principle of oxygen inhibition to make a certain thickness of uncured liquid resin between the resin and the molded part,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08J9/40C08J7/06C08J7/04C08J5/18B33Y70/10C08L27/18C08L23/06C08L23/08C08L45/00C08L83/04
CPCC08J9/40C08J9/42C08J7/065C08J5/18B33Y70/00C08J2327/18C08J2323/06C08J2323/08C08J2345/00C08J2383/04C08J7/0427
Inventor 段玉岗李晓刚康小青李玥萱王成萌
Owner XI AN JIAOTONG UNIV
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