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Polylactic acid-based 3D printing composite material capable of continuously emitting light, and preparation method thereof

A 3D printing and composite material technology, which is applied in the field of polylactic acid-based 3D printing composite materials and its preparation, can solve the problems of poor dispersion of polylactic acid, easy moisture absorption and agglomeration, and achieve the effect of improving mechanical properties and expanding application fields

Pending Publication Date: 2021-10-29
NORTHWEST NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phosphor (SrAl 2 o 4 : Eu 2+ , Dy 3+ ) when directly mixed with polylactic acid has the disadvantages of easy moisture absorption and caking in the air, poor dispersion in polylactic acid, etc.

Method used

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  • Polylactic acid-based 3D printing composite material capable of continuously emitting light, and preparation method thereof
  • Polylactic acid-based 3D printing composite material capable of continuously emitting light, and preparation method thereof
  • Polylactic acid-based 3D printing composite material capable of continuously emitting light, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Using strontium carbonate, aluminum oxide, boric acid, europium oxide and dysprosium oxide as raw materials, the long afterglow phosphor (SrAl 2 o 4 : Eu 2+ , Dy 3+ ); according to mass percentage, respectively take 1% long-lasting phosphor, 1% KH570 and 98% polylactic acid; add 0.1g long-lasting phosphor to 1mL ethanol, add long-lasting phosphor to ethanol, After ultrasonic oscillation for 20min, add the KH570 taken, adjust the pH=4 with acetic acid, at 50°C and N 2 Reflux under atmosphere for 10h (speed 250r / min), cool to room temperature, centrifuge, filter and wash with ammonia water and ethanol several times to remove acetic acid and unreacted KH570, dry in a vacuum oven at 80°C to constant weight, grind, The phosphor powder modified by KH570 was obtained; the obtained polylactic acid was placed in a vacuum oven, dried at 60°C for 7 hours, and then blended with the phosphor powder modified by KH570 to obtain a 3D printing blend with sustainable luminescence; Th...

Embodiment 2

[0032] Using strontium carbonate, aluminum oxide, boric acid, europium oxide and dysprosium oxide as raw materials, the long afterglow phosphor (SrAl 2 o 4 : Eu 2+ , Dy 3+ ); according to mass percentage, respectively take 2% long-lasting phosphor, 1.6% KH570 and 96.4% polylactic acid, add 1g long-lasting phosphor to 1mL ethanol, add long-lasting phosphor to ethanol, and ultrasonically After shaking for 30min, add the taken KH570, adjust the pH to 5 with acetic acid, at 60°C and N 2 Reflux under atmosphere for 15h (speed 350r / min), cool to room temperature, centrifuge, filter and wash with ammonia water and ethanol several times to remove acetic acid and unreacted KH570, dry in a vacuum oven at 90°C to constant weight, grind, Phosphor powder modified by KH570 was obtained; polylactic acid was dried in a vacuum oven at 60°C for 5 hours, and blended with phosphor powder modified by KH570 to obtain a sustainable luminous 3D printing blend; the blend was loaded into a 3D printi...

Embodiment 3

[0037] Using strontium carbonate, aluminum oxide, boric acid, europium oxide and dysprosium oxide as raw materials, the long afterglow phosphor (SrAl 2 o 4 : Eu 2+ , Dy 3+ ); according to the mass percentage, take 3% long-lasting phosphor, 0.1% KH570 and 96.9% polylactic acid; add 0.55g long-lasting phosphor to 1mL ethanol, add In ethanol, after ultrasonic oscillation for 10 min, add the obtained KH570, adjust pH = 6 with acetic acid, at 70 °C and N 2 Reflux under atmosphere for 24h (speed 500r / min), cool to room temperature, centrifuge, filter and wash with ammonia water and ethanol several times to remove acetic acid and unreacted KH570, dry in a vacuum oven at 85°C to constant weight, grind, Phosphor powder modified by KH570 was obtained; polylactic acid was dried in a vacuum oven at 60°C for 10 hours, and blended with phosphor powder modified by KH570 to obtain a 3D printing blend material with sustainable luminescence; the blend material was loaded into a 3D printing e...

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Abstract

The invention discloses a polylactic acid-based 3D printing composite material capable of continuously emitting light, and preparation thereof. The composite material is prepared from, by mass, long afterglow fluorescent powder, KH570 and polylactic acid. The preparation method comprises the following steps: adding the long-afterglow fluorescent powder into ethanol, carrying out ultrasonic oscillation, adding KH570, adjusting the pH value, refluxing, cooling, washing, carrying out vacuum drying to constant weight, and grinding to obtain KH570 modified fluorescent powder; carrying out vacuum drying on polylactic acid, and blending with KH570 modified fluorescent powder to obtain a blend; and performing melt manufacturing on the blend through a 3D printing extruder, and extruding and drawing to obtain the polylactic acid-based 3D printing composite material capable of continuously emitting light. According to the preparation method, the combination of a long-afterglow luminescent material and a 3D printing technology is realized, and the prepared 3D printing composite material not only can continuously emit light, but also has good mechanical properties, can be applied to the aspects of medicine, the manufacturing industry, the food industry, the industry, the jewelry industry and the like, and greatly expands the application field of 3D printing.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and 3D printing materials, and relates to a polylactic acid-based 3D printing composite material with sustainable light emission and a preparation method thereof. Background technique [0002] 3D printing technology, also known as rapid prototyping technology, is a kind of material such as metals, ceramics and polymers. After modeling through computer animation models, it is printed layer by layer in the form of digital model files without any mechanical processing or molds. You can get the technology of structural devices. Its printing principle is similar to traditional printing, but the raw materials used are different. Compared with removal processing, there is almost no material waste in the 3D printing process, and the human resource consumption is small, so it is favored by many material processing fields. In recent years, 3D printing has begun to appear in people's daily life a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/06C08K3/24B33Y70/10
CPCC08K9/06C08K3/24B33Y70/10C08L67/04
Inventor 曾巍何超群张苗管洁闵魁英蒋佩良
Owner NORTHWEST NORMAL UNIVERSITY
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