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Synthesis of P(AM/AA/SSS/DMAAC-16) and Studying Its Performance as a Fracturing Thickener in Oilfields.
Polymers (Basel)
January 2025
Engineering Research Center of Oil and Gas Field Chemistry, Universities of Shaanxi Provence, Xi'an Shiyou University, Xi'an 710065, China.
In order to solve the problems of long dissolution and preparation time, cumbersome preparation, and easy moisture absorption and deterioration during storage or transportation, acrylamide (AM), acrylic acid (AA), sodium p-styrene sulfonate (SSS), and cetyl dimethylallyl ammonium chloride (DMAAC-16) were selected as raw materials, and the emulsion thickener P(AM/AA/SSS), which can be instantly dissolved in water and rapidly thickened, was prepared by the reversed-phase emulsion polymerization method. DMAAC-16, the influence of emulsifier dosage, oil-water ratio, monomer molar ratio, monomer dosage, aqueous pH, initiator dosage, reaction temperature, reaction time, and other factors on the experiment was explored by a single-factor experiment, and the optimal process was determined as follows: the oil-water volume ratio was 0.4, the emulsifier dosage was 7% of the oil phase mass, the initiator dosage was 0.
View Article and Find Full Text PDF-Derived Near-Infrared Carbon Dots for Bioimaging and Antimicrobial Applications.
Molecules
January 2025
Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
The use of biomass feedstocks for producing high-value-added chemicals is gaining significant attention in the academic community. In this study, near-infrared carbon dots (NIR-CDs) with antimicrobial and bioimaging functions were prepared from branches and leaves using a novel green synthesis approach. The spectral properties of the synthesized NIR-CDs were characterized by ultraviolet-visible (UV-Vis) absorption and fluorescence spectroscopy.
View Article and Find Full Text PDFEvaluation of Mechanochemically Prepared CePO∙HO Nanoparticles as UV Filter for Photoprotective Formulations.
Molecules
January 2025
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR 10000 Zagreb, Croatia.
Rhabdophane, CePO∙HO, nanoparticles were prepared by mechanochemical synthesis with different durations and thoroughly characterized by various characterization techniques. X-ray diffraction analysis showed that the optimal synthesis duration was 15 min, since, in this case, pure rhabdophane is obtained, without traces of contamination by the vessel material. The size of the obtained nanoparticles, as determined from high-resolution transmission electron microscopy images, was around 5 nm.
View Article and Find Full Text PDFPerformance of Self-Compacting Mortars Using Ground Seashells as Recycled Sand.
Materials (Basel)
January 2025
Department of Construction Engineering, University of Córdoba, E.P.S of Belmez, Avenida de la Universidad s/n, E-14240 Córdoba, Spain.
The findings highlight the potential for broadening the use of shell aggregates in construction applications. This research investigated the viability of incorporating milled seashells as fine sand replacements for natural calcareous sand in the production of self-compacting mortar. These results highlight a promising avenue for coastal industries to reduce waste while enhancing the durability of construction materials.
View Article and Find Full Text PDFSynthesis of Nanocrystal-Embedded Bulk Metallic Glass Composites by a Combination of Mechanical Alloying and Vacuum Hot Pressing.
Materials (Basel)
January 2025
Research Center of Digital Oral Science and Technology, College of Oral Medicine, Taipei Medical University, Taipei 110-301, Taiwan.
Bulk metallic glasses (i.e., BMGs) have attracted a lot of research and development interest due to their unique properties.
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