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Preparation method of carbon fiber reinforced polylactic acid 3D printing material

A 3D printing and carbon fiber technology, applied in the polymer field, can solve the problems of low crystallinity of polylactic acid, long molding cycle, and difficult molding, and achieve the effect of improving comprehensive mechanical properties, improving polarity, and improving mechanical properties.

Inactive Publication Date: 2021-01-26
合肥通融新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fu Xuejun et al. (Plastic Science and Technology, 2007, 35(7), 50) used ethylene-vinyl acetate copolymer to toughen polylactic acid, and used plasticizer dioctyl phthalate (DOP) to increase the toughness of the two. Phase compatibility, but DOP has potential carcinogenicity, and the application of its polylactic acid products is also limited, and the above method also makes it difficult to form polylactic acid with low crystallinity and long molding cycle

Method used

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  • Preparation method of carbon fiber reinforced polylactic acid 3D printing material

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Embodiment 1

[0031] A method for preparing a carbon fiber reinforced polylactic acid 3D printing material, specifically, comprising the following steps:

[0032] (1) After soaking and cleaning the carbon fiber in 5% hydrogen peroxide solution for 30 minutes, take it out, clean it with clean water, filter and dry it, and place the carbon fiber in a low-temperature plasma instrument for surface treatment;

[0033] (2) adding the surface-treated carbon fiber and sodium lauryl sulfate equivalent to 3% by weight in acetone, and ultrasonically dispersing for 20 minutes to obtain a carbon fiber dispersion;

[0034] (3) After adding maleic anhydride to the carbon fiber dispersion, heat up to 40 degrees Celsius, stir and mix at 500 rpm for 100 minutes, wash and dry the filter layer, add styrene and initiator to it, and mix well, Raise the temperature to 80 degrees Celsius, react for 3-4 hours, filter, wash repeatedly, and dry in an oven to obtain modified carbon fibers;

[0035] (4) in natural rub...

Embodiment 2

[0047] A method for preparing a carbon fiber reinforced polylactic acid 3D printing material, specifically, comprising the following steps:

[0048] (1) After soaking and cleaning the carbon fiber in 10% hydrogen peroxide solution for 30 minutes, take it out, clean it with clean water, filter and dry it, and place the carbon fiber in a low-temperature plasma instrument for surface treatment;

[0049] (2) adding the surface-treated carbon fiber and sodium lauryl sulfate equivalent to 5% by weight in acetone, and ultrasonically dispersing for 40 minutes to obtain a carbon fiber dispersion;

[0050] (3) After adding maleic anhydride to the carbon fiber dispersion, heat up to 60 degrees Celsius, stir and mix at a speed of 800 rpm for 150 minutes, after the filter layer is washed and dried, add styrene and initiator to it, and mix well After that, heat up to 90 degrees Celsius, react for 4 hours, filter, wash repeatedly, and dry in an oven to obtain modified carbon fibers;

[0051...

Embodiment 3

[0063] A method for preparing a carbon fiber reinforced polylactic acid 3D printing material, specifically, comprising the following steps:

[0064] (1) After soaking and cleaning the carbon fiber in 8% hydrogen peroxide solution for 30 minutes, take it out, clean it with clean water, filter and dry it, and place the carbon fiber in a low-temperature plasma apparatus for surface treatment;

[0065] (2) adding the surface-treated carbon fiber and sodium lauryl sulfate equivalent to 3.8% of its weight in acetone, and ultrasonically dispersing it for 29 minutes to obtain a carbon fiber dispersion;

[0066] (3) After adding maleic anhydride to the carbon fiber dispersion, heat up to 55 degrees Celsius, stir and mix at a speed of 620 rpm for 135 minutes, wash and dry the filter layer, add styrene and initiator to it, and mix well After that, the temperature was raised to 86 degrees Celsius, reacted for 3.4 hours, filtered, washed repeatedly, and dried in an oven to obtain modified ...

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Abstract

The invention discloses a preparation method of a carbon fiber reinforced polylactic acid 3D printing material, which relates to the field of high polymer materials. The preparation method specifically comprises the following steps of (1) surface activation of carbon fibers, (2) surface modification of carbon fibers, (3) grafting the surface of the natural rubber, (4) modifying polylactic acid particles, and (5) preparing the carbon fiber reinforced polylactic acid 3D printing material. According to the method, after the surfaces of the carbon fibers are activated, the styrene-maleic anhydridecopolymer is introduced, so that the compatibility of the carbon fibers and polylactic acid is improved, the mechanical property of the composite material is greatly improved, meanwhile, monomers aregrafted with natural rubber and then are blended, melted and extruded with the polylactic acid, and the toughness of the polylactic acid is improved; and the comprehensive mechanical property of thecomposite material is improved through double modification.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a method for preparing a carbon fiber reinforced polylactic acid 3D printing material. Background technique [0002] Polylactic acid is a biodegradable polymer prepared by chemical synthesis based on renewable plant resources. The thermoplasticity of polylactic acid enables it to be extruded on general-purpose processing equipment like PP, PS and PET polymers. , injection molding and other molding processing. In addition, polylactic acid also has unique biocompatibility and biodegradability. Therefore, as a biodegradable polymer, polylactic acid has become the focus of attention in the polymer academic and industrial circles. [0003] Polylactic acid has high strength and rigidity, but poor toughness and impact resistance. It is a hard and brittle material at room temperature. Therefore, the toughening and plasticizing modification of polylactic acid has always been an important researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/04C08K9/04C08K9/00C08K7/06C08J5/06D06M14/36D06M10/02C08F279/02C08F220/14C08F220/18B33Y70/10D06M101/40
CPCB33Y70/10C08F279/02C08J5/042C08J5/06C08J2367/04C08J2451/04C08K7/06C08K9/00C08K9/08D06M10/025D06M14/36D06M2101/40C08F220/14C08F220/1804
Inventor 王道军王玉龙付伟
Owner 合肥通融新型材料科技有限公司
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