3D printing photosensitive material taking green light as photocuring light source and 3D printer thereof

A 3D printing, photosensitive material technology, applied in the field of 3D printing, can solve the problems of low curing depth and poor curing accuracy, and achieve the effect of increasing the curing depth, reducing the curing width, and avoiding the problem of interlayer cracking.

Inactive Publication Date: 2022-01-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In view of the deficiencies in the prior art, the present invention aims to provide a 3D printing photosensitive material with green light as the light curing light sou...

Method used

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  • 3D printing photosensitive material taking green light as photocuring light source and 3D printer thereof
  • 3D printing photosensitive material taking green light as photocuring light source and 3D printer thereof
  • 3D printing photosensitive material taking green light as photocuring light source and 3D printer thereof

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Experimental program
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Embodiment 1

[0036] This embodiment discloses an SLA-type 3D printer and a 3D printing method. The 3D printing method is implemented by using an SLA-3D printer using green light as a light source, and the light source is a 520nm green laser light source.

[0037] This embodiment also discloses a 3D printing photosensitive resin, using phenothiazine curcumin / iodonium salt as the green light photoinitiation system, the content is 0.5g / 1.5g, and the composition of the photosensitive resin is epoxy acrylic resin / difunctionality Polyurethane acrylic resin / tripropylene glycol diacrylate is 35g / 25g / 35g, defoamer / adhesion promoter is 1g / 2g. The molar extinction coefficient of phenothiazine curcumin at 520nm is 16900M -1 cm-1 .

[0038] In this embodiment, the curing depth of the 3D printing photosensitive resin is 53 mm at 500 mJ.

[0039] In this embodiment, the optical power density of the green light SLA-3D printer during work is 500mW / cm 2 , the focal plane spot size is 0.15mm, the layer t...

Embodiment 2

[0042] This embodiment discloses a DLP type 3D printer and a 3D printing method. The 3D printing method is implemented by using a DLP-3D printer using green light as a light source, and the light source is a 520nm green laser light source.

[0043] This embodiment also discloses a 3D printing photosensitive ceramic slurry, using triphenylamine curcumin / iodonium salt as the green photoinitiation system, the content is 0.5g / 1.5g, and the composition of the photosensitive resin is acryloylmorpholine / hexafunctional Polyurethane acrylic resin / tripropylene glycol diacrylate is 5g / 8g / 7g, zirconia nano powder is 75g, defoamer / dispersant is 1g / 2g.

[0044] The molar extinction coefficient of triphenylamine curcumin at 520nm is 11998M -1 cm -1 .

[0045] In this embodiment, the curing depth of the 3D printing photosensitive ceramic slurry is 1.00 mm at 500 mJ.

[0046] In this embodiment, the optical power density of the green light DLP-3D printer during work is 10mW / cm 2 , the la...

Embodiment 3

[0049] This embodiment discloses a DLP type 3D printer and a 3D printing method. The 3D printing method is implemented by using a DLP-3D printer using green light as a light source, and the light source is a 520nm green laser light source.

[0050] This embodiment also discloses a 3D printing photosensitive metal paste, using triphenylamine curcumin / iodonium salt as the green light photoinitiation system, the content is 0.5g / 1.5g, and the composition of the photosensitive resin is acryloylmorpholine / hexafunctional Polyurethane acrylic resin / tripropylene glycol diacrylate is 2g / 9g / 4g, spherical tungsten nano powder is 80g, anti-sedimentation agent / dispersant is 2g / 1g.

[0051] In this embodiment, the curing depth of the photosensitive metal paste for 3D printing is 0.86 mm at 500 mJ.

[0052] In this embodiment, the optical power density of the green light DLP-3D printer during work is 10mW / cm 2 , the layer thickness is 0.05mm (precision manufacturing) / 0.1mm (rapid manufacturi...

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Abstract

The invention discloses a 3D printing photosensitive material taking green light as a photocuring light source. The 3D printing photosensitive material at least comprises a green light photo-initiation system, the green light photo-initiation system is a Norrish I type photosensitizer and a Norrish II type photosensitizer which have light absorption and initiation capability in a green light wavelength range, and the system comprises a curcumin compound/onium salt system, a boron bifluoride curcumin compound/onium salt system, a ferrocene-contained conjugated indandione compound/onium salt/N-methyl pyrrolidone system, a benzal ketone compound/onium salt system and a benzal ketone compound/amine system. The 3D printing photosensitive material has the beneficial effects that on one hand, through the principles that the longer the wavelength is, the lower the light refractive index is, and the longer the wavelength is, the stronger the light penetrability is, the curing depth of the 3D printing material can be remarkably improved, and the problem of interlayer cracking is avoided, especially for the 3D printing material with the high refractive index, such as 3D printing photosensitive ceramic slurry; and on the other hand, through the principle that the longer the wavelength is, the lower the light refractive index is, the curing width of the 3D printing material can be remarkably reduced, and the curing and printing precision can be improved, especially for the 3D printing material with the high refractive index, such as 3D printing photosensitive ceramic slurry.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printing photosensitive material using green light as a light curing light source and a 3D printer thereof. Background technique [0002] The photocuring 3D printing method refers to the 3D printing method based on the photocuring (photopolymerization) method, which has the characteristics of fast speed, high efficiency and good precision. Existing light-curing 3D printing methods mostly use ultraviolet light sources, because almost all of the current commercial photoinitiators are used under ultraviolet light. [0003] In actual use, the photocuring 3D printing method based on ultraviolet light source has the problems of poor precision, easy delamination, and low success rate. This is because the 3D printing process is controlled by the shape and range of light in the photocuring 3D printing process, and whether it is a photosensitive resin or a powder in various photosensitive ...

Claims

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Application Information

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IPC IPC(8): B29C64/129B33Y10/00B28B1/00
CPCB29C64/129B33Y10/00B28B1/001
Inventor 王钢
Owner SUN YAT SEN UNIV
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