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Due to its significant shrinkage and warping issues, printing using HDPE as a raw material is difficult. CNF was converted to a CNF-based macroinitiator by an esterification reaction, followed by a surface-initiated single-electron transfer living radical polymerization of the hydrophobic monomer stearyl acrylate. CNF-PSAs, poly stearyl acrylate-grafted cellulose nanofibrils, were synthesized, purified, and characterized with ATR-FTIR, 13C CP-MAS NMR, FE-SEM, and water contact angle measurements. No CNF aggregates could be found, according to a morphological report, which also revealed the high matrix/CNF compatibility, as no CNF aggregates could be found. Using a circular arc method, a decrease in the warping behavior of the composite filament relative to HDPE was assessed. When compared to the object printed with neat HDPE, the 3D printing of intricate objects using the CNF-PSA/HDPE filament resulted in improved print quality. It could be argued that CNF-PSA was a suitable filler for HDPE's reinforcement, thereby making it suitable for 3D printing.
Source link: https://doi.org/10.3390/fib10100091
The most representative example of attempts to minimize radiation exposure to radiation workers is now, protective clothing worn in the clinical field. Lead, on the other hand, is classified as a drug that can cause lead poisoning in the human body. Our results showed that the shielding rate of the mixed tungsten filament was higher than that of the new protective devices, proving its ability to replace lead as the most safe material in the clinical field.
Source link: https://doi.org/10.3390/polym14204301
Electrocardiogram signals are obtained using commercial Silver and Silver Chloride wet electrodes in several bioimpedance applications. The results showed that the concentric and flat dry electrode structures of T bed = 80, 150 and 150 00b0C with the highest results, implying that different electrode types and printing parameters can significantly influence electrode functionality, conductivity, and impedance measurements.
Source link: https://doi.org/10.1149/10916.0003ecst
Fused Filament Fabrication is a commonly used additive manufacturing process in industry to produce complex structures sustainably. This thesis investigates the use of deep neural networks to create a closed-loop in-process monitoring architecture that can pausing a printer once a warp is detected, in order to prevent warp deformation's adverse effects. Hyperparameters can be optimized using a manual or an automated process. Both methods and tested in a lab scaled manufacturing environment were used to establish this data. To evaluate this statement, classification methods were optimized according to both approaches and tested in a laboratory scaled manufacturing environment.
Source link: https://doi.org/10.32920/ryerson.14635695.v1
Fused Filament Fabrication is an additive manufacturing process that is commonly used in industry to produce complicated structures sustainably. This thesis explores the use of deep neural networks to build a closed-loop in-process monitoring architecture capable of pausing a printer after a warp is identified. Any neural network, including CNNs, is dependent on their hyperparameters. To evaluate this statement, classification methods were developed and tested in a laboratory scaled manufacturing environment.
Source link: https://doi.org/10.32920/ryerson.14635695
Abstract 3d printing is capable of providing dose individualization for pediatric drugs and transforming the precision medicine approach to practical use. For precision medicine, individual characteristics of patients are considered for the selection of the most appropriate API in the most effective dose with the most positive release profile to improve therapeutic outcome. Inherently suitable for manufacturing of individualized drugs in small batch sizes that cannot be manufactured with conventional techniques, such as sizes, shapes, release profiles, and drug combinations. The PolyPrint consortium is currently researching novel polymers for fused deposition modeling, filament manufacturing, and manufacturing development, as well as optimization of the printing process and the design of a GMP-capable FDM 3d printer. In addition, engineering solutions for quality assurance during the printing process and in the final dosage form will be discussed alongside considerations for a GMP-capable printer design.
Source link: https://doi.org/10.1007/s43441-021-00354-0
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