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Integrating C-H Information to Improve Machine Learning Classification Models for Microplastic Identification from Raman Spectra.
Anal Chem
January 2025
Department of Chemistry, University of Waterloo, 200 University Avenue W., Waterloo, Ontario N2L 3G1, Canada.
Research has shown microplastic particles to be pervasive pollutants in the natural environment, but labor-intensive sample preparation, data acquisition, and analysis protocols continue to be necessary to navigate their diverse chemistry. Machine learning (ML) classification models have shown promise for identifying microplastics from their Raman spectra, but all attempts to date have focused on the lower energy "fingerprint" region of the spectrum. We explore strategies to improve ML classification models based on the -nearest-neighbor algorithm by including other regions of the Raman spectra.
View Article and Find Full Text PDFParametric optimization and sensitivity analysis of the integrated Taguchi-CRITIC-EDAS method to enhance the surface quality and tensile test behavior of 3D printed PLA and ABS parts.
Heliyon
January 2025
Department of Industrial & Production Engineering, Bangladesh University of Engineering & Technology, Dhaka, 1000, Bangladesh.
3D printing is a popular and cost-effective method for producing lightweight engineering parts with enhanced characteristics and detailed prototypes. Nevertheless, the quality of the print can be diminished by the selection of improper parameter settings. This investigation explored the impact of printing factors on the tensile behavior of polylactic acid (PLA) and Acrylonitrile Butadiene Styrene (ABS) specimens.
View Article and Find Full Text PDFA Technical-Economic Study on Optimizing FDM Parameters to Manufacture Pieces Using Recycled PETG and ASA Materials in the Context of the Circular Economy Transition.
Polymers (Basel)
January 2025
Department of Mechanical Engineering, Doctoral School, Petroleum-Gas University of Ploiesti, 100680 Ploiesti, Romania.
Article Synopsis
- The paper focuses on optimizing FDM (Fused Deposition Modeling) parameters, specifically layer height (L) and infill density percentage (I), for creating tensile and compression samples from recycled PETG and ASA materials.
- The study employs value analysis to balance mechanical strength and production cost, revealing that layer height primarily affects tensile samples made from rPETG, while infill density is crucial for rASA samples.
- Ultimately, the research identifies optimal FDM settings (L = 0.20 mm and I = 100%) for producing parts from recycled materials, supporting circular economy practices in manufacturing.
A Carbazole Acrylonitrile Substituted Turn-On Fluorescence Chemosensors for Cyanide Ion and its Application to Real Sample Analysis.
J Fluoresc
January 2025
Post-Graduate and Research Department of Chemistry, Government Arts College (Autonomous), Coimbatore, Tamil Nadu, 641 018, India.
An efficient probe (E)-2-(benzo[d]thiazol-2-yl)-3-(9-ethyl-9 H-carbazol-3-yl)acrylonitrile (CZ-BTZ) for selective fluorescence "turn-on" response with cyanide (CN) ion sensor was developed by simple Knoevenagel condensation of 9-ethyl-9 H carbazole-3-carbaldehyde with 2-(benzo[d]thiazol-2-yl) acetonitrile. The sensing ability of probe CZ-BTZ was tested with different inorganic anions through spectrophotometric and spectrofluorimetric methods. The UV-vis and fluorescence spectral studies show the formation of a new adduct between CZ-BTZ and CN by appearing with a new absorbance band at 350 nm and "turn-on" fluorescence at 535 nm in CHCN: HO (8:2, v/v, pH 7.
View Article and Find Full Text PDFThe Effect of Elastomer Content and Annealing on the Physical Properties of Upcycled Polyethylene Terephthalate-Maleated Styrene Ethylene Butylene Styrene Blends for Additive Manufacturing.
Materials (Basel)
December 2024
Polymer Extrusion Lab, The University of Texas at El Paso, El Paso, TX 79968, USA.
In the work presented here, we explore the upcycling of polyethylene terephthalate (PET) that was derived from water bottles. The material was granulated and extruded into a filament compatible with fused filament fabrication (FFF) additive manufacturing platforms. Three iterations of PET combined with a thermoplastic elastomer, styrene ethylene butylene styrene with a maleic anhydride graft (SEBS-g-MA), were made with 5, 10, and 20% by mass elastomer content.
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