Researchers Kirill S. Erokhin, Evgeniy G. Gordeev and Valentine P. Ananikov from the Institute of Organic Chemistry of the Russian Academy of Sciences conducted in-depth studies3D printingThe new level of science, in the recently published “Revelation of Laminar Interaction”, outlines the polymer materials at the solid-liquid interface for establishing3D printingApplied solvent compatibility chart. “
3D printingThe strength and stability of parts is an area that users are constantly improving today. Researchers have conducted a lot of experiments on materials to figure out how to get better results, create new algorithms, study the causes and effects of porosity, and solutions. Eliminate structural defects. The focus of this research is on the effects of chemicals, but the authors evaluated the response of thermoplastics to various solvents.
Although there are obvious challenges in manufacturing almost any kind of parts or prototypes, in many applications (such as medicine and related fields, such as tissue engineering, aerospace, automotive, agriculture, etc.), the benefits can be huge and have huge potential. Infinite innovation. However, the stability of functional components used in critical applications must be ensured. During the printing process, the microstructure may change, porosity may affect quality, and exposure to organic solvents may cause chemical decomposition.
Materials such as polyetheretherketone (PEEK), polyphenylsulfone (PPSU), and polyetherimide (Ultem) may show chemical resistance and exhibit excellent mechanical properties, but for most “super building materials “Expensive to customize3D printingMachine to maintain high temperature (the temperature required for successful manufacturing is 350-400 degrees Celsius).
“In addition, this material itself is expensive (compared to traditional production-grade thermoplastics), which makes their daily use not very common. Although there are high requirements for low shrinkage, high strength, and chemical resistance FDM materials , But the efforts in its development are still limited.” The researchers explained.
As an important limitation,3D printingVery unsuitable for the production of plastic objects that will be exposed to liquid media. The restriction is due to the sensitivity of plastics to liquid chemicals. “
Simply adjusting the printing parameters can provide a solution, even in the case of a large amount of exposure to solvents, it can also make the structure more reasonable.The author uses the cylindrical part and the same3D printingA copy of the comparative model experiment was carried out.
When they immersed the part in DCM,3D printingThe parts began to lose their integrity quickly.
A sample was created using the Picaso 3D Designer Pro 250 printer and the following information about the material was provided:
Printing with ABS, SBS, PLA, nylon, PP, PE, PETG, HIPS, POM and Primalloy is done by using a 0.3mm nozzle at a layer height of 0.2mm. Printing with filled plastic PLA-Cu, Nylon-C and Ceramo is done by using 0.5mm nozzles with a layer height of 0.35mm. “
In the end, 12 different solvents were used:
- Dichloromethane (DCM)
- Tetrahydrofuran (THF)
- acetone
- Dimethylformamide (DMF)
- Toluene
- Ethyl acetate
- Triethylamine (TEA)
- acetic acid
- Ethanol
- sulfuric acid
- Sodium hydroxide
- water
This group of authors explained: “Manufacturing methods (traditional and3D printing) Is essential for the real performance in contact with liquids. “They explained that “simple solvent compatibility tables” are not enough.
Other polymer materials have also been tested and have the highest chemical resistance including: PP, PE, POM, nylon and nylon C. Alternatively, FDM materials (such as PLA, ABS, SBS, and HIPS) show less solvent resistance.
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