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Composite material for 3D printing and preparation method thereof

A composite material and composition technology, applied in the field of 3D printing materials and their preparation, can solve the problems of high brittleness, poor heat resistance, low molecular weight, etc. Simple process effect

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

The common problems of these materials are high hardness, high brittleness of printed parts, and harsh printing conditions, making it difficult to print tiny structures with high definition
[0005] CN101016373A discloses a method for degradable copolyester of aromatic polyester and aliphatic polyester by reactive blending. Although the operation is easy, because the melting point of aromatic polyester is above 240 degrees, the reactive blending The temperature is 280 degrees, which is very high, and the aliphatic polyester is severely degraded and discolored
Due to the limited molecular weight of the prepared copolyester due to the vacuum degree of the equipment, the molecular weight is relatively low, usually <100000g / mol, the tensile strength is about 27MPa, which is relatively low, the heat resistance is poor, the heat distortion temperature is about 70 degrees, and the price is high. At about 35,000, it is three times the price of ordinary polyolefins, which severely limits its large-scale application

Method used

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  • Composite material for 3D printing and preparation method thereof
  • Composite material for 3D printing and preparation method thereof
  • Composite material for 3D printing and preparation method thereof

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Experimental program
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preparation example Construction

[0054] The tensile strength and impact strength heat distortion temperature of the homopolymer obtained according to the preparation method provided by the present invention are respectively measured according to ISO527 and ISO180 test standards.

[0055] 3. Biodegradation performance test

[0056] The biodegradability of the block copolymer prepared by the present invention is measured with Pseudomonas sp. enzyme, and the membrane sample (10 * 10 * 0.1mm) of polymer is immersed in the phosphate buffer solution (pH=6.86) that contains the enzyme of 1mg, places In a water bath at 45°C, take out the samples regularly at 45°C and dry them for 3 hours, then weigh them and measure them. The amount of degradation of the sample is [100(W 0 -W t )] / W 0 calculate. Change the buffer solution every 24 hours.

Embodiment 1

[0059] 1) Preparation of hydroxyl-terminated aliphatic and aromatic copolyesters

[0060] At room temperature, 2500 g of succinic acid, terephthalic acid, 1,4-butanediol, and ethylene glycol were added in a molar ratio of 0.95:0.05:2.8:0.2 into a 5 L reaction kettle replaced by high-purity nitrogen. At the same time, the reactor is equipped with a high-purity nitrogen inlet, a mechanical stirrer, and a condenser. The above reaction system was controlled at 170°C, stirred and reacted with nitrogen gas until the water yield reached 95% of the theoretical water yield, then the temperature was raised to 230°C, the pressure was slowly lowered to 50 Pa, and then polycondensed for 10 hours. A copolyester having a number average molecular weight of 1,000 was obtained.

[0061] 2) Preparation of aliphatic and aromatic copolyester composites

[0062] The copolyester obtained in the above step 1) was dried at 100° C. for 3 hours. A total of 2000g of copolyester and MDI according to th...

Embodiment 2

[0064] 1) Preparation of hydroxyl-terminated aliphatic and aromatic copolyesters

[0065] At room temperature, first add succinic acid, terephthalic acid, 1,4-butanediol at a molar ratio of 0.05:0.95:1.6, a total of 2500g, 0.75g of butyl titanate, and 79102.5g of antioxidant to the high-purity nitrogen replacement in a 5L reactor. At the same time, the reactor is equipped with a high-purity nitrogen inlet, a mechanical stirrer, and a condenser. Control the above reaction system at 180°C, stir the reaction with nitrogen gas until the water yield reaches 90% of the theoretical water yield, then add 2.5g of butyl titanate to raise the temperature to 250°C, slowly reduce the pressure to 200Pa, and polycondense for 1 hour . A copolyester is obtained with a number average molecular weight of 5×10 4 .

[0066] 2) Preparation of aliphatic and aromatic copolyester composites

[0067] The copolyester obtained in step 1), HDI according to the molar ratio of 1:1.1 total 2375g, nano-c...

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Abstract

The invention relates to a 3D printing material and a preparation method thereof, and in particular, relates to a composite material for 3D printing and a preparation method thereof. Specifically, the invention provides a composition comprising: 1) a polyester copolymer prepared by copolymerizing the following components: i) substituted or unsubstituted aliphatic or alicyclic polybasic acid, ii) substituted or unsubstituted aliphatic or alicyclic polyol, and iii) substituted or unsubstituted aromatic polybasic acid; 2) a chain extender; and 3) inorganic particles.

Description

technical field [0001] The invention relates to a 3D printing material and a preparation method thereof, in particular to a 3D printing composite material and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, does not require traditional tools, fixtures and multiple processing procedures. It can automatically and accurately manufacture parts of any complex shape through program control on one device, and greatly reduces The processing procedure shortens the processing cycle. 3D printing technology is even called the third industrial revolution following the steam engine and the Ford assembly line, bringing about changes in manufacturing processes and production models. 3D printing technology has been applied in biomedicine, aerospace, construction, automobile and other industries. [0003] However, the key problem and challenge facing 3D printing technology at present is that 3D printing mol...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G63/183C08K3/26C08K3/36C08K3/34
CPCC08G18/4216C08G18/73C08G18/7671C08G63/183C08K3/26C08K3/346C08K3/36C08K2003/265C08K2201/011
Inventor 郑柳春李春成肖耀南管国虎朱文祥符文鑫林学春马永梅孙文华徐坚董金勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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