high-filling-content micro-nano powder/polymer composite material for 3D printing and preparation method and product thereof

A technology of micro-nano powder and 3D printing, applied in 3D object support structures, manufacturing tools, additive manufacturing, etc., can solve the problems of slow molding speed, poor product strength, toughness, etc., 3D printing practicability, and universality Limitation and other issues, to achieve the effect of improved performance, excellent hardness, improved thermal stability and chemical corrosion resistance

Active Publication Date: 2014-08-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently, the most commonly used polymer materials for 3D printing are nylon, ABS, polycarbonate, and polyphenylene sulfone, etc. These materials require high temperature when molding, not only the molding speed is slow, but also the finished product has excellent properties such as strength and toughness. Poor
In contrast, the development of other 3D printing materials is very rare, which also limits the practicability and universality of 3D printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A high-filling micro-nano powder / polymer composite material for 3D printing

[0051] 1) Mix 100 parts by weight of 500nm Ag powder and 5 parts of dopamine in 200 parts of Tris buffer (pH8.5), react for 24 hours, and dry at 70°C after repeated washing.

[0052]2) 10 parts by weight of PE (melt index 11.5), 90 parts of modified Ag powder, 0.05 parts of radiation sensitizer triallyl cyanurate, 0.02 parts of antioxidant 1010 in Mix uniformly at room temperature, and send into a twin-screw extruder with an aspect ratio of 36 for extrusion and granulation (referred to as pellet A). Among them, the extruder speed is 20r / min, and the temperature range of each section of the extruder is: feeding section 150-170°C, melting section 190-200°C, mixing section 190-200°C, exhaust section 170-190°C, The homogenization section is 160-180°C.

Embodiment 2

[0054] A kind of 3D printing product that the composite material of embodiment 1 makes

[0055] The pellet A obtained in Example 1 is added to the nozzle of the 3D printer, heated and melted in the nozzle, the nozzle moves along the section profile of the part and the filling track, and the molten material is extruded at the same time, utilizing the thermal melting and bonding properties of the material It is solidified rapidly after extrusion under computer control, and irradiated with electron beams (electron accelerator energy is 0.5MeV, power is 50KW, and irradiation dose is 5KGy), so that the material is cross-linked and formed layer by layer.

[0056] The resulting 3D printed articles have excellent hardness, dimensional stability and electrical conductivity.

Embodiment 3

[0058] A high-filling micro-nano powder / polymer composite material for 3D printing

[0059] 1) 100 parts by weight of 500nm Al 2 o 3 For powder, 10 parts of silane coupling agent KH550 are mixed evenly in 200 parts of water, reacted at 60°C for 24 hours, washed several times and dried at 70°C.

[0060] 2) 15 parts by weight of PP (melt index 12.2), 85 parts of modified Al 2 o 3 Powder, 0.1 part of radiation sensitizer triallyl isocyanurate, 0.01 part of antioxidant 1096 are mixed uniformly at room temperature, and sent to a twin-screw extruder with an aspect ratio of 36 for extrusion Granulate (denoted as pellet B). Among them, the speed of the extruder is 40r / min, and the temperature range of each section of the extruder is: feeding section 150-170°C, melting section 190-200°C, mixing section 190-200°C, exhaust section 170-190°C, The homogenization section is 160-180°C.

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Abstract

The invention relates to a high-filling-content micro-nano powder / polymer composite material for 3D printing and a preparation method and a product thereof. The material contains the following raw materials, by weight, 10-30 parts of a polymer, 90-70 parts of a micro-nano powder, 0.05-0.2 part of an irradiation sensitizer and 0.01-0.02 part of an antioxidant. The micro nano powder is used as a main material and polymer resin is used as a binding agent, and moulding is finished by a 3D printing mode. Simultaneously, the irradiation sensitizer is added, and the polymer resin forms a three-dimensional cross-linked network after electron beam irradiation. Then, strength, heat resistance and chemical corrosion resistance are raised after resin bonding. The high-filling-content micro-nano powder endows the moulding material with excellent mechanical properties. In addition, according to changes of product usage environment and demand, types of the micro-nano powder are changed so as to obtain a material with special functionality, such as excellent conductivity, thermal conductivity, flame resistance, impact resistance and the like.

Description

technical field [0001] The present invention relates to a material for 3D printing and its preparation method and product, in particular to a high-filling micro-nano powder / polymer composite material for 3D printing and its preparation method and product. Background technique [0002] 3D printing is an emerging rapid prototyping technology. Through computer modeling, 3D model programs are set, and materials such as metal, ceramic powder or polymer are controlled by computer digital software programs by means of laser sintering, heating melting, and ultraviolet curing. The layers are built up and bonded to form a solid product. In simple terms, 3D printing can be regarded as the superposition of 2D printing technology in space. Using materials such as solid powder or polymer melt as printing "ink", through computer modeling and design, the precision and size of the product can be precisely controlled. Compared with the traditional molding technology, this printing technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L77/00C08L69/00C08L23/08C08L55/02C08K13/06C08K9/04C08K3/08C08K9/06C08K3/22C08K3/26C08K3/34C08K5/103C08K5/3492C08K5/134C08K5/526B29C47/92B29C67/00B29C35/08B29C48/40B29C48/92
CPCB29C47/40B29C2947/92714B29C47/0011B29B2009/125B29C47/92B29C47/6087B29C64/112B29C48/92B29C35/0866C08K3/08C08K3/22C08K3/26C08K3/34C08K3/346C08K5/103C08K5/1345C08K5/34924C08K9/04C08K9/06B29C2948/92209C08K2201/003C08K2201/011C08K2003/265C08K2003/2227C08K2003/2244C08K2003/0806C08L2312/06C08L2201/02C08L2201/08C08L23/06C08L23/12C08L77/00C08L69/00C08L23/0853C08L55/02B29C2948/92704B29C48/04B29C48/40B29C48/625B29C2948/9259B29C2948/92714B29C2948/92895B29C2948/92904
Inventor 沈衡朱唐郭靖赵宁徐坚孙文华董金勇李春成符文鑫林学春马永梅
Owner INST OF CHEM CHINESE ACAD OF SCI
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