阅读说明：本技术 一种高分子陶瓷复合3d打印材料及其制备方法 (Polymer ceramic composite 3D printing material and preparation method thereof ) 是由 张长松 张雷 张耀鹏 于 2019-10-15 设计创作，主要内容包括：本发明提供了一种高分子陶瓷复合3D打印材料,其特征在于,包括如下重量份的原料：陶瓷粉75-85、热塑性塑料粉末10-30、界面改性剂0.05-0.5、偶联剂0.05-0.5,粘接剂0.02-0.1。本发明还提供了其制备方法：将所述陶瓷粉置入高速分散机,常使所述陶瓷粉发生碰撞摩擦至表面凹陷,均相于水蒸汽环境中加入改性剂等,喷雾干燥后得3D打印材料。本发明中陶瓷粉在高速分散机碰撞后产生表面凹陷,增加了对助剂的吸附力；制备的产品,内应力小,力学性能高,表面光洁度好。(The invention provides a polymer ceramic composite 3D printing material which is characterized by comprising the following raw materials in parts by weight: 75-85 parts of ceramic powder, 10-30 parts of thermoplastic powder, 0.05-0.5 part of interface modifier, 0.05-0.5 part of coupling agent and 0.02-0.1 part of adhesive. The invention also provides a preparation method thereof: and (3) putting the ceramic powder into a high-speed dispersion machine, usually enabling the ceramic powder to collide and rub until the surface is sunken, adding a modifier and the like into a water vapor environment, and performing spray drying to obtain the 3D printing material. According to the invention, the ceramic powder generates surface depression after collision of the high-speed dispersion machine, so that the adsorption force on the auxiliary agent is increased; the prepared product has small internal stress, high mechanical property and good surface smoothness.)

1. The polymer ceramic composite 3D printing material is characterized by comprising the following raw materials in parts by weight: 75-85 parts of ceramic powder, 10-30 parts of thermoplastic powder, 0.05-0.5 part of interface modifier, 0.05-0.5 part of coupling agent and 0.02-0.1 part of adhesive; the ceramic powder comprises one or more of quartz powder, calcium carbonate, pyrophyllite powder, mica, talcum powder, calcium sulfate whisker, montmorillonite and silicon dioxide, and the thermoplastic plastic comprises one or more of polybutylene terephthalate, polyphenylene sulfate, polylactide, polycarbonate and ethylene vinyl acetate.

2. The printed material of claim 1, wherein the interfacial modifier is a carboxylated polyether interfacial modifier.

3. The printed material of claim 1, wherein the coupling agent is a silane modifier comprising: vinyltriacetylsilane, butadienyltriethoxysilane.

4. The printing material of claim 1, wherein the binder is one or more of silica sol, aluminum metaphosphate solution, and polyvinyl alcohol solution.

5. The printed material according to claim 1, wherein the ceramic powder and the thermoplastic powder each have a particle size of < 100 μm.

6. A method for preparing a printed material according to any of claims 1-5, comprising the steps of:

s1, placing the ceramic powder into a high-speed dispersion machine, processing at the normal pressure of 100-;

s2, introducing water vapor into the high-speed dispersion machine, controlling the temperature in the machine to be 80-220 ℃, the pressure to be 200-400Pa and the rotating speed to be 6000-8000 rpm, and enabling the ceramic powder to be in the water vapor environment;

s3, mixing and surface coupling modification treatment are carried out in a high-speed mixer, the feeding speed and flow rate are 0.5-1g/S, and then a modifier, a coupling agent and a binder solution flow in sequence, and the mixing time is 1-1.5 h;

and S4, spraying the atomized liquid, fully mixing the atomized liquid with thermoplastic plastic powder, wherein the spraying temperature is 80-90 ℃, and drying to obtain the 3D printing material.

7. The preparation method according to claim 6, wherein the polymer ceramic composite slurry with the water content of the 3D printing material controlled to be 6.5-9 wt% is applicable to a 3D printing technology of a direct write technology (DIW).

8. The preparation method of claim 6, wherein the 3D printing material is controlled to have a water content of 0.05wt% of the polymer ceramic composite powder, and the preparation method is applicable to a 3D printing technology of Selective Laser Sintering (SLS).

Technical Field

The invention relates to the field of 3D consumable manufacturing, in particular to a polymer ceramic composite 3D printing material and a preparation method thereof.

Background

3D printing, one of the rapid prototyping technologies, is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and the like in a layer-by-layer printing manner based on a digital model file. 3D printing is typically achieved using digital technology material printers. The method is often used for manufacturing models in the fields of mold manufacturing, industrial design and the like, and is gradually used for directly manufacturing some products, and parts printed by the technology are already available. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

The common printer used in daily life can print planar articles designed by a computer, the working principle of the 3D printer is basically the same as that of the common printer, only the printing materials are different, the printing materials of the common printer are ink and paper, the 3D printer is filled with different printing materials such as metal, ceramic, plastic, sand and the like, the printing materials are actual raw materials, after the printer is connected with the computer, the printing materials can be stacked layer by layer through computer control, and finally, a blueprint on the computer is changed into an actual object. Colloquially, a 3D printer is a device that can "print" out real 3D objects, such as printing a robot, printing a toy car, printing various models, even food, and so on. The generic name "printer" refers to the technical principle of a common printer, since the process of layered processing is very similar to inkjet printing. This printing technique is called a 3D stereoscopic printing technique.

Ceramics are the historical evidence of the development of Chinese civilization, and play an important role in tableware and artistic decorations from ancient times to present. The ceramic parts are all manufactured by kiln sintering, and because of the unnecessary development of other functions of the ceramic, the selection of the ceramic raw material varieties in China is single and traditional. The advent of 3D printing and the excavation of ceramic functionality has resulted in ceramic materials requiring updating both from a formulation standpoint and from a technological standpoint.

Disclosure of Invention

In view of the above, the invention provides a polymer ceramic composite 3D printing material and a preparation method thereof.

The invention is realized by the following technical scheme:

a polymer ceramic composite 3D printing material comprises the following raw materials in parts by weight: 75-85 parts of ceramic powder, 10-30 parts of thermoplastic powder, 0.05-0.5 part of interface modifier, 0.05-0.5 part of coupling agent and 0.02-0.1 part of adhesive; the ceramic powder comprises one or more of quartz powder, calcium carbonate, pyrophyllite powder, mica, talcum powder, calcium sulfate whisker, montmorillonite and silicon dioxide, and the thermoplastic plastic comprises one or more of polybutylene terephthalate, polyphenylene sulfate, polylactide, polycarbonate and ethylene vinyl acetate.

Preferably, the interfacial modifier is a carboxylated polyether interfacial modifier.

Preferably, the coupling agent is a silane modifier comprising: vinyltriacetylsilane, butadienyltriethoxysilane.

Preferably, the binder is one or more of silica sol, aluminum metaphosphate solution and polyvinyl alcohol solution.

Preferably, the particle size of both the ceramic powder and the thermoplastic powder is < 100. mu.m.

The preparation method of the printing material comprises the following steps:

s1, placing the ceramic powder into a high-speed dispersion machine, processing at the normal pressure of 100-;

s2, introducing water vapor into the high-speed dispersion machine, controlling the temperature in the machine to be 80-220 ℃, the pressure to be 200-400Pa and the rotating speed to be 6000-8000 rpm, and enabling the ceramic powder to be in the water vapor environment;

s3, mixing and surface coupling modification treatment are carried out in a high-speed mixer, the feeding speed and flow rate are 0.5-1g/S, and then a modifier, a coupling agent and a binder solution flow in sequence, and the mixing time is 1-1.5 h;

and S4, spraying the atomized liquid, fully mixing the atomized liquid with thermoplastic plastic powder, wherein the spraying temperature is 80-90 ℃, and drying to obtain the 3D printing material.

In some embodiments, the polymer ceramic composite slurry with the water content of 6.5-9 wt% for the 3D printing material can be applied to a 3D printing technology of a direct writing forming technology (DIW).

In other embodiments, the 3D printing technology of selective laser sintering SLS is applicable to polymer ceramic composite powder with water content of 0.05wt% for controlling the 3D printing material.

The invention has the beneficial effects that:

(1) firstly, ceramic powder is collided in a high-speed dispersion machine to enable the surface of the ceramic powder to be sunken, and thermoplastic plastic is compounded after other auxiliaries are better adsorbed;

(2) the obtained printing product has small internal stress, good mechanical property and smooth and fine surface;

(3) the preparation method has simple process and low cost, is suitable for mass preparation and is easy to realize industrialization;

(4) the method can be used for various 3D printing and forming methods, such as a direct writing forming technology (DIW), a Selective Laser Sintering (SLS) and the like.

Detailed Description

In order that the present invention may be more clearly understood, the following detailed description of the present invention is given with reference to specific examples.