阅读说明：本技术 3d打印文物修复用环保材料及其制备方法 (Environment-friendly material for 3D printing cultural relic restoration and preparation method thereof ) 是由 杨勰 于 2019-10-09 设计创作，主要内容包括：本发明公开3D打印文物修复用环保材料及其制备方法,包括：硅灰石粉体,磷酸三钙粉体,氧化铝粉体,硅烷偶联剂,光敏树脂预混液,引发剂、分散剂等,其制备方法包括：(1)硅灰石粉体的制备；(2)硅灰石粉体的表面改性；(3)光敏树脂预混液的添加；(4)混合浆料的制备。硅灰石表面采用硅烷偶联剂进行改性,使用于光固化树脂的丙烯酸与硅灰石粉体的结合性提高,硅灰石粉体与粉体之间由于包覆了丙烯酸,配合分散剂的分散作用,使混合浆料中粉体与粉体之间的粘滞性能相对降低,固化后使未固化与固化后的浆料之间界限更加清晰,对于用于文物复制打印的材料来说,成型后的打印体具有更加光滑、细致的表面。(The invention discloses an environment-friendly material for 3D printing cultural relic restoration and a preparation method thereof, wherein the environment-friendly material comprises the following components: wollastonite powder, tricalcium phosphate powder, alumina powder, silane coupling agent, photosensitive resin premix liquid, initiator, dispersant and the like, wherein the preparation method comprises the following steps: (1) preparing wollastonite powder; (2) modifying the surface of wollastonite powder; (3) adding a photosensitive resin premix; (4) and preparing mixed slurry. The surface of the wollastonite is modified by adopting a silane coupling agent, so that the bonding property between acrylic acid used for photocuring resin and wollastonite powder is improved, the wollastonite powder is coated with the acrylic acid and matched with the dispersion effect of a dispersing agent, the viscosity performance between the powder and the powder in the mixed slurry is relatively reduced, the boundary between the uncured slurry and the cured slurry is clearer after curing, and a formed printing body has a smoother and finer surface for a material used for copy printing of cultural relics.)

1.3D prints environmental protection material for historical relic restoration, its characterized in that: comprises the following raw materials in parts by weight,

200-230 parts of wollastonite powder, 20-45 parts of tricalcium phosphate powder and 25-50 parts of alumina powder;

1.6-4.0 parts of a silane coupling agent;

80-100 parts of acrylic acid and 15-25 parts of silica sol;

40-65 parts of saturated ammonia water;

2-5 parts of N, N' -methylene bisacrylamide;

1173 (2-hydroxy-methyl phenyl propane-1-ketone) 5-8 parts;

15-20 parts of sodium polyacrylate.

2. The 3D printing environment-friendly material for cultural relics restoration according to the claim 1, wherein: the particle size of the wollastonite powder is 30-50 microns, the particle size of the tricalcium phosphate powder is 150-200 microns, and the particle size of the alumina powder is 100-150 microns.

The preparation method of the environment-friendly material for repairing the 3D printed cultural relics is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,

(1) preparing wollastonite powder: crushing and finely grinding wollastonite, grinding the wollastonite until the particle size is 30-50 mu m, preparing 0.5mol/L dilute hydrochloric acid solution, mixing the ground wollastonite powder and the dilute hydrochloric acid solution according to the mass (Kg) to volume (L) of 1:3, stirring for 5-10 min, washing with clear water, carrying out suction filtration, and finally drying to obtain wollastonite powder;

(2) surface modification of wollastonite powder: adding the wollastonite powder obtained in the step (1) into a high-speed heating mixer, adding a silane coupling agent, keeping the temperature at 80-90 ℃, and controlling the time at 25-30 min to obtain modified wollastonite powder;

(3) adding the photosensitive resin premix: mixing acrylic acid and silica sol, fully stirring and uniformly mixing, then adding the mixture into the modified wollastonite powder obtained in the step (2), and ultrasonically dispersing for 20-30 min at a stirring speed of 200-250 r/min in an ultrasonic cleaning instrument to obtain a mixture;

(4) preparing mixed slurry: and (4) adding other residual materials into the mixture obtained in the step (3), adding saturated ammonia water to adjust the pH value to 9, and preparing mixed slurry by using a ball milling method.

Technical Field

The invention relates to the technical field of 3D printing, in particular to an environment-friendly material for repairing 3D printed cultural relics and a preparation method thereof.

Background

The photocuring molding technology is also called as stereolithography technology, at present, raw materials used by the technology are mainly photosensitive resin, and slurry formed by mixing ceramic powder and photosensitive resin can be used in the aspect of 3D ceramic printing raw materials.

The cultural relics are printed by utilizing three-dimensional printing, so that the cultural relics can be repaired, a plurality of incomplete cultural relics can be completely presented to people, more people can know the truest cultural relics by limiting the region where the cultural relics walk out, the unmovable cultural relics are scanned, and then the complete cultural relics are three-dimensionally printed in a high-precision simulation mode and are used for watching the cultural relics in other regions. However, in many cultural relics, it is most difficult to determine that the printing material, especially the ceramic cultural relics, has low viscosity, the surface of the printed finished product is too rough due to easy caking of the material, the photocuring is not facilitated due to high viscosity of the material, and the formed microstructure is deformed by gravity. Therefore, the invention mainly solves the problem that the finished product after the three-dimensional cultural relic is printed has rough surface or deformation because the viscosity among the powder of the material is not easy to control.

Disclosure of Invention

The invention provides an environment-friendly material for repairing 3D printed cultural relics and a preparation method thereof, aiming at overcoming the defects of the prior art, and mainly solving the problem that the surface of a finished product after three-dimensional cultural relic printing is rough or deformed due to the fact that the viscosity of powder of the material is not easy to control.

The invention solves the technical problems through the following technical means:

the environment-friendly material for 3D printing cultural relic restoration comprises the following raw materials in parts by weight,

200-230 parts of wollastonite powder, 20-45 parts of tricalcium phosphate powder and 25-50 parts of alumina powder;

1.6-4.0 parts of a silane coupling agent;

80-100 parts of acrylic acid and 15-25 parts of silica sol;

40-65 parts of saturated ammonia water;

2-5 parts of N, N' -methylene bisacrylamide;

1173 (2-hydroxy-methyl phenyl propane-1-ketone) 5-8 parts;

15-20 parts of sodium polyacrylate.

Preferably, the particle size of the wollastonite powder is 30-50 μm, the particle size of the tricalcium phosphate powder is 150-200 μm, and the particle size of the aluminum oxide powder is 100-150 μm.

The preparation method of the environment-friendly material for repairing the 3D printed cultural relics comprises the following steps,

(1) preparing wollastonite powder: crushing and finely grinding wollastonite, grinding the wollastonite until the particle size is 30-50 mu m, preparing 0.5mol/L dilute hydrochloric acid solution, mixing the ground wollastonite powder and the dilute hydrochloric acid solution according to the mass (Kg) to volume (L) of 1:3, stirring for 5-10 min, washing with clear water, carrying out suction filtration, and finally drying to obtain wollastonite powder;

(2) surface modification of wollastonite powder: adding the wollastonite powder obtained in the step (1) into a high-speed heating mixer, adding a silane coupling agent, keeping the temperature at 80-90 ℃, and controlling the time at 25-30 min to obtain modified wollastonite powder;

(3) adding the photosensitive resin premix: mixing acrylic acid and silica sol, fully stirring and uniformly mixing, then adding the mixture into the modified wollastonite powder obtained in the step (2), and ultrasonically dispersing for 20-30 min at a stirring speed of 200-250 r/min in an ultrasonic cleaning instrument to obtain a mixture;

(4) preparing mixed slurry: and (4) adding other residual materials into the mixture obtained in the step (3), adding saturated ammonia water to adjust the pH value to 9, and preparing mixed slurry by using a ball milling method.

The invention has the advantages that: the surface of the wollastonite is modified by adopting a silane coupling agent, so that the bonding property of acrylic acid used for photocuring resin and wollastonite powder is improved, the mechanical property of the wollastonite as a structure is improved, the wollastonite powder is coated with the acrylic acid and matched with the dispersion effect of a dispersing agent, so that the viscosity property between the powder and the powder in the mixed slurry is relatively reduced, the boundary between the uncured slurry and the cured slurry is clearer after curing, and a molded printed body has a smoother and finer surface for a material used for copy printing of cultural relics.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.