Modified carbon fiber reinforced polyamide 6 composite material for 3D printing, and preparation method and application thereof

A fiber reinforced, composite material technology, applied in the direction of additive processing, can solve the problems of uneven microscopic fiber dispersion, difficult to meet technical requirements, low dimensional accuracy, etc., and achieve excellent dimensional stability, excellent mechanical strength, and excellent mechanical properties. Effect

Inactive Publication Date: 2020-07-17
DALIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

At the same time, because fused deposition (FDM) 3D printing requires high dimensional accuracy of consumables, it generally requires a wire diameter error of ±0.5mm and a roundness of ±0.1mm. Experiments have shown that unmodified carbon fiber reinforced polyamide 6 materials When processed into 3D printing consumables, the dispersion of microscopic fibers is uneven, the dimensional accuracy is low, and the improvement of mechanical properties is limited, so it is difficult to meet the technical requirements

Method used

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  • Modified carbon fiber reinforced polyamide 6 composite material for 3D printing, and preparation method and application thereof
  • Modified carbon fiber reinforced polyamide 6 composite material for 3D printing, and preparation method and application thereof
  • Modified carbon fiber reinforced polyamide 6 composite material for 3D printing, and preparation method and application thereof

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preparation example Construction

[0036] The present invention also discloses a preparation method of the above-mentioned modified carbon fiber reinforced polyamide 6 composite material, comprising the following steps:

[0037] (1) Drying: put polyamide 6 pellets into a constant temperature oven for drying to obtain dry moisture-free polyamide 6 pellets for later use; the drying method refers to that the drying temperature of the constant temperature oven is controlled at 80°C to 100°C In the range, the drying time is controlled between 6 hours and 9 hours. The preferred drying temperature is 90°C and the drying time is 8 hours.

[0038] (2) Carbon fiber modification: Dissolve the modified silane coupling agent in ethanol solution, and place the modified silane coupling agent solution and carbon fiber in an airtight container according to the formula amount. The airtight container usually uses a glass water tank to facilitate observation and fully react , and then pour out the remaining liquid, place it in an...

Embodiment 1

[0046] The invention provides a preparation method and application of a modified carbon fiber reinforced polyamide 6 composite material, which is composed according to the following weight percentages:

[0047] Weigh 95 parts of polyamide 6 (manufacturer: Tai-Young Nylon Co., Ltd.), 5 parts of carbon fiber tow (Toray, Japan), and 1 part of silane coupling agent (KH550, Shanghai Yaohua Chemical Factory), and the polyamide Amide 6 and carbon fiber tow were dried at 90° C. for 8 hours to obtain the first product;

[0048] Fully react the carbon fiber tow of the first product with the modified silane coupling agent solution in a glass tank for 24 hours, and form the second product with the polyamide 6 of the first product;

[0049] The second product is melted, blended, extruded and granulated by a twin-screw extruder to obtain the third product. The temperature of each section of the twin-screw extruder from the feed port to the discharge port is 235°C in the first zone, and 235°...

Embodiment 2

[0053] The invention provides a preparation method and application of a modified carbon fiber reinforced polyamide 6 composite material, which is composed according to the following weight percentages:

[0054] Weigh 90 parts of polyamide 6 (manufacturer: Tai-Young Nylon Co., Ltd.), 10 parts of carbon fiber tow (Toray Corporation of Japan), 2 parts of silane coupling agent (KH550, Shanghai Yaohua Chemical Factory), and the polyamide Amide 6 and carbon fiber tow were dried at 90° C. for 8 hours to obtain the first product;

[0055] Fully react the carbon fiber tow of the first product with the modified silane coupling agent solution in a glass tank for 24 hours, and form the second product with the polyamide 6 of the first product;

[0056] The second product is melted, blended, extruded and granulated by a twin-screw extruder to obtain the third product. The temperature of each section of the twin-screw extruder from the feed port to the discharge port is 235°C in the first zo...

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Abstract

The invention provides a modified carbon fiber reinforced polyamide 6 wire for 3D printing, and a preparation method and application thereof. A modified carbon fiber reinforced polyamide 6 composite material of the invention is prepared from the following components in parts by weight: 85-95 parts of a polyamide 6 material, 5-15 parts of carbon fibers and 1-3 parts of a modified silane coupling agent. According to a technical scheme provided by the invention, carbon fiber grafting is facilitated by utilizing the modified silane coupling agent; the prepared composite material has the characteristics of uniform wire diameter, smooth surface, excellent mechanical property and relatively small material shrinkage rate, can be applied to the field of 3D printing consumables, and overcomes the technical defects that a polyamide 6 material is prone to buckling deformation in the printing process, the mechanical property of a printed member is poor and wires are prone to generation of bubbles in the prior art. The polyamide 6 printing wire of the invention has practical value, the maximum tensile strength of the polyamide 6 printing wire can exceed 110 MPa under the condition of a low carbon fiber content (10-15%), and the polyamide 6 printing wire is far superior to many polyamide 6 printing wires on the market.

Description

technical field [0001] The present invention relates to the technical field of 3D printing fiber-reinforced polyamide materials, in particular to a modified carbon fiber-reinforced polyamide 6 composite material for 3D printing and its preparation method and application. Background technique [0002] 3D printing technology, that is, additive manufacturing technology, is an advanced rapid prototyping technology that has developed rapidly in the past ten years. It has significant advantages such as short cycle, no mold, good adaptability to complex structures, and portable manufacturing that traditional material molding processes do not have. , known as "the most iconic production tool of the third industrial revolution". [0003] Fused deposition modeling (FDM) is currently the most common 3D printing method on the market. Its technology innovation is developing rapidly, but there are not many printing materials to choose from, which greatly limits its development. Common 3D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K9/06C08K7/06C08J5/06B33Y70/10
CPCB33Y70/00C08J5/042C08J5/06C08J2377/02C08K7/06C08K9/06
Inventor 桑琳彭兴双郭政川
Owner DALIAN UNIV OF TECH
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