3D printing modified polyamino acid material and preparation method thereof

A polyamino acid and 3D printing technology, which is applied in the field of 3D printing modified polyamino acid materials and its preparation, can solve the problems that polyamino acid materials cannot meet the requirements of mechanical properties of 3D printing technology, and achieve significant modification effects, maintain strength, The effect of high product quality

Active Publication Date: 2014-09-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented method involves combining different chemicals together at very specific temperatures for certain steps during their synthesis or manufacture processes. By doing this they can create new materials with improved properties that cannot be achieved when made separately from each other. These modifications include adding various substances like dyes, pigments, solvents, catalysts, etc., modifying the structure of these compounds themselves (chain extending), enhancing the performance of existing products while reducing costs associated therewith.

Problems solved by technology

Technics: In this patented method for making objects with high tensile stiffness and resistance against damage caused during handling, it involves depositing polymeric aminonitrogen compounds onto sheets made up of synthetic resins called acrylic rubber) beforehand without any chemical reactions involved like crosslinkers between molecules. These techniques allow for precise control over how much energy needs to be input into each part being produced, resulting in improved productivity rates and reduced costs associated with producing customized products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) 75 parts of polyamino acids (molecular weight: 200,000), 5 parts of dibutanol diisocyanate, 5 parts of polyhydrocarbyl acrylate, 0.5 parts of heat stabilizer 1010, 1 part of 5000 mesh montmorillonite, 5 parts Add nano-silica and 0.5 parts of antioxidant into a low-temperature disc grinder, fully mix and grind for 2 hours at -10°C and 440 rpm, and then discharge;

[0046] 2) The mixture obtained in step 1) and 8 parts of polybutylene succinate were mixed and extruded to granulate with a twin-screw extruder, and the residence time of the material in the extruder was 2 minutes. The screw diameter of the twin-screw extruder is 60mm, the aspect ratio is 15:1, the temperature of the extruder is set as follows: 160°C, 165°C, 175°C, 180°C, 175°C, and the die head temperature is 195°C;

[0047]3) Dry the particles made in step 2) at a temperature of 60° C. for 2 hours and extrude them into filaments with a diameter of 1.65 mm with a twin-screw extruder. The screw diameter of ...

Embodiment 2

[0051] 1) 80 parts of polyamino acids (molecular weight 200,000), 3 parts of diphenylmethane diisocyanate, 2 parts of trimethylolpropane trimethacrylate, 0.5 parts of heat stabilizer 168, 1 part of 5000 Add talcum powder, 5 parts of nano-carbon nanotubes, and 0.5 parts of antioxidant to a low-temperature disc grinder, fully mix and grind for 1.5 hours at -10°C and a speed of 350 r / min, and then discharge;

[0052] 2) Mix the mixture obtained in step 1) and 8 parts of polybutylene adipate with a twin-screw extruder, extrude and pelletize, and the residence time of the material in the extruder is 1.5 minutes. The screw diameter of the twin-screw extruder is 60mm, the aspect ratio is 15:1, the temperature of the extruder is set as follows: 180°C, 185°C, 195°C, 200°C, 190°C, and the die head temperature is 205°C;

[0053] 3) Dry the particles made in step 2) at a temperature of 50° C. for 2.5 hours and extrude them into filaments with a diameter of 1.75 mm with a twin-screw extrud...

Embodiment 3

[0057] 1) 80 parts of polyamino acid (molecular weight 200,000), 5 parts of hexamethylene diisocyanate, 3 parts of trimethylolpropane triacrylate, 0.5 parts of heat stabilizer 1096, 1 ​​part of 5000 mesh talc powder, 2 parts of nano-silica, and 0.5 parts of antioxidant are added to a low-temperature disc grinder, fully mixed and ground for 1.5 hours at -10°C and 440r / min, and then discharged;

[0058] 2) The mixture obtained in step 1) is mixed with 8 parts of poly(adipic acid-succinic acid) butanediol copolyester with a twin-screw extruder to extrude and pelletize, and the material stays in the extruder The time is 2 minutes. The screw diameter of the twin-screw extruder is 60mm, the aspect ratio is 15:1, the temperature of the extruder is set as follows: 180°C, 185°C, 190°C, 200°C, 195°C, and the die temperature is 210°C;

[0059] 3) Dry the particles made in step 2) for 3 hours at a temperature of 50° C. and extrude them into filaments with a diameter of 3 mm with a twin-s...

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Abstract

The invention relates to a 3D printing modified polyamino acid material. Raw materials for preparing the 3D printing modified polyamino acid material comprise, by weight, 75-85 parts of polyamino acid, 1-5 parts of a chain extender, 1-5 parts of a crosslinking agent, 0.5-1 part of a nucleating agent, 5-10 parts of a toughening agent, 0.1-0.5 parts of a thermal stabilizer, 1-5 parts of a reinforcing agent and 0.3-0.8 parts of an antioxidant. A low temperature crushing mixing reaction technology is used to modify polyamino acid, so the toughness, the impact strength and the thermal deformation temperature of the modified polyamino acid are greatly improved, thereby the polyamino acid material has a good application prospect in 3D printing.

Description

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Claims

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Application Information

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Owner INST OF CHEM CHINESE ACAD OF SCI
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