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Bamboo fiber reinforced polylactic acid composite material used for 3D printing and preparation method for bamboo fiber reinforced polylactic acid composite material

A 3D printing and composite material technology, applied in the field of bamboo fiber reinforced polylactic acid composite material and its preparation, can solve problems such as difficulties in industrialization, and achieve the effects of easy industrialization, improving interface force, and improving overall performance

Active Publication Date: 2015-09-23
琪恒泰新材料科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polylactic acid modification method reported in the literature mainly uses polylactic acid to carry out copolymerization with other monomers. This modification method needs to re-synthesize the material, which brings many difficulties to industrialization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare a kind of bamboo fiber reinforced polylactic acid composite material for 3D printing according to the following steps:

[0038] (1) prepare modified bamboo fiber;

[0039] Alkali treatment of bamboo fiber: soak 80-mesh bamboo fiber in 10wt% NaOH aqueous solution (the mass ratio of bamboo fiber to NaOH aqueous solution is 1:15) and stir at room temperature for 24 hours, then wash the bamboo fiber to neutral with deionized water, and use a filter screen After filtering, place the bamboo fiber in an oven at 80°C and dry it continuously for 24 hours; then take it out and pulverize it with a high-speed pulverizer for use;

[0040](2) After drying, bamboo fiber, polylactic acid, polypropylene, compatibilizer MAPP, and plasticizer PEG are taken out after mixing in a high-speed mixer in proportion for 8 minutes; wherein the content of bamboo fiber is controlled at 10wt%, and the amount of polypropylene added 10wt%, the polylactic acid content is 72wt%, the compatibiliz...

Embodiment 2

[0050] Prepare a kind of bamboo fiber reinforced polylactic acid composite material for 3D printing according to the following steps:

[0051] (1) prepare modified bamboo fiber;

[0052] Alkali treatment of bamboo fiber: soak 60-mesh bamboo fiber in 10wt% NaOH aqueous solution (the mass ratio of bamboo fiber to NaOH aqueous solution is 1:15) and stir at room temperature for 24 hours, then wash the bamboo fiber to neutral with deionized water, and use a filter screen After filtering, place the bamboo fiber in an oven at 80°C and dry it continuously for 24 hours; then take it out and pulverize it with a high-speed pulverizer for use;

[0053] Alkali+silane coupling agent handles bamboo fiber: put into the container that the silane coupling agent (KH560) ethanol solution of 10wt% is housed respectively through the bamboo fiber of alkali treatment, the insulation of silane coupling agent (KH560) and bamboo fiber The dry mass ratio is 2%; then the container is placed in a water ba...

Embodiment 3

[0059] Prepare a kind of bamboo fiber reinforced polylactic acid composite material for 3D printing according to the following steps:

[0060] (1) prepare modified bamboo fiber;

[0061] Alkali treatment of bamboo fiber: soak 60-mesh bamboo fiber in 10wt% NaOH aqueous solution (the mass ratio of bamboo fiber to NaOH aqueous solution is 1:15) and stir at room temperature for 24 hours, then wash the bamboo fiber to neutral with deionized water, and use a filter screen After filtering, place the bamboo fiber in an oven at 80°C and dry it continuously for 24 hours; then take it out and pulverize it with a high-speed pulverizer for use;

[0062] Alkali + isocyanate treatment of bamboo fiber: the bamboo fiber through alkali treatment is sent in the container that 10wt% MDI / IPDI acetone solution is housed, wherein the dry mass ratio of MDI / IPDI and bamboo fiber is 2%; Heat it in a water bath at 70°C for 4 hours, and after the acetone is completely volatilized, send it to a constant ...

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Abstract

The invention discloses a bamboo fiber reinforced polylactic acid composite material used for 3D printing and a preparation method for the bamboo fiber reinforced polylactic acid composite material. The material is a co-mixture comprising modified bamboo fibers, polylactic acid, polypropylene, a compatilizer and a plasticizer. The invention further provides the preparation method for the bamboo fiber reinforced polylactic acid composite material, wherein the preparation method comprises the following steps: preparing the modified bamboo fibers; co-mixing the bamboo fibers, the polylactic acid, the polypropylene, the compatilizer and the plasticizer by a high-speed mixer to form co-mixed materials; fusing, co-mixing, extruding and pelletizing the co-mixed materials by a twin-screw extrusion method, and repeating the extruding twice; processing the composite material particles into monofilaments by a single screw extruder after drying. According to the bamboo fiber reinforced polylactic acid composite material, on the basis of keeping the excellent performance of the polylactic acid, elongation at break and impact resistance of the material are improved. The method is more liable to realize industrialization, and the material has unique color of natural bamboo fibers, and color master batch is not required to add in a processing process for coloring.

Description

technical field [0001] The invention belongs to the field of 3D printing materials, in particular to a bamboo fiber reinforced polylactic acid composite material for 3D printing and its preparation. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and others. The personal 3D printing that emerged around 2008 mainly uses FDM (Fused Deposition Modeling or Fused Deposition Modeling) technology to complete the printing. Fused Deposition Modeling (Fused Deposition Modeling, FDM) rapid prototyping process is a method that does not rely on lase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/12C08L97/02C08L51/06C08L71/08B33Y70/00
Inventor 董先明伍志强周武艺刘作涛蔚睿智沈玉婷
Owner 琪恒泰新材料科技(深圳)有限公司
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