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

Abstract

The invention discloses a 3D printing photosensitive material taking green light as a photocuring light source, which at least comprises a green light initiation system, the green light initiation system is a Norrish I type photosensitizer and a Norrish II type photosensitizer which have light absorption initiation capability in a green light wavelength range, and the green light initiation system is a Norrish I type photosensitizer and a Norrish II type photosensitizer which have light absorption initiation capability in a green light wavelength range. Comprising a curcumin compound / onium salt system, a difluoro boron curcumin compound / onium salt system, a ferrocene-containing conjugated indandione compound / onium salt / N-methyl pyrrolidone system, a benzal ketone compound / onium salt system and a benzal ketone compound / amine system. The preparation method 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 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 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 ...

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