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Effects of Beech Wood Surface Treatment with Polyethylenimine Solution Prior to Finishing with Water-Based Coating.
Polymers (Basel)
December 2024
Faculty of Forestry, University of Belgrade, 11030 Belgrade, Serbia.
The surfaces of beech wood samples were treated with polyethylenimine (PEI) solutions at three different concentrations-0.5%, 1% and 2%-and two molecular weights-low molecular weight (LMW) and high molecular weight (HMW). The effects of PEI surface treatment of wood were characterized by FT-IR spectroscopy, the penetration depth of PEI (EPI fluorescence spectroscopy), the bonding position of PEI (by SEM), the wetting and surface energy, and the water uptake.
View Article and Find Full Text PDFRedox-Active Water-Soluble Low-Weight and Polymer-Based Anolytes Containing Tetrazine Groups: Synthesis and Electrochemical Characterization.
Polymers (Basel)
December 2024
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia.
Polymer-based aqueous redox flow batteries (RFBs) are attracting increasing attention as a promising next-generation energy storage technology due to their potential for low cost and environmental friendliness. The search for new redox-active organic compounds for incorporation into polymer materials is ongoing, with anolyte-type compounds in high demand. In response to this need, we have synthesized and tested a range of new water-soluble redox-active s-tetrazine derivatives, including both low molecular weight compounds and polymers with different architectures.
View Article and Find Full Text PDFEffect of argon plasma and dentin rehydration on bond strength of dental adhesives to etched dentin.
Braz Dent J
December 2024
Department of Restorative Dentistry. Piracicaba Dental School, University of Campinas, Brazil.
This study investigated the effects of nonthermal atmospheric pressure plasma (NAPP) application and dentin rehydration with water (REHY) on bond strength (BS) of adhesives. Three etch-and-rinse adhesives were tested: Scotchbond Multi-Purpose (SBM / water-based primer + adhesive resin), Gluma Bond Universal (GBU / single-bottle containing acetone as organic solvent) and Prime&Bond Universal (PBU / single-bottle containing propanol as organic solvent). Adhesives were applied: 1- to phosphoric acid-etched dentin (Control), 2- after NAPP application for 45 seconds to etched dentin or 3- after REHY with water (10 seconds) of plasma-treated etched dentin.
View Article and Find Full Text PDFEnhancing the Properties of Latex-Based Coatings with Carboxylated Cellulose Nanocrystals.
Biomacromolecules
December 2024
Department of Chemical Engineering, Smith Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada.
Latex-based nanocomposites containing carboxylated cellulose nanocrystals (cCNCs) were synthesized via in situ seeded semibatch emulsion polymerization. Inspired by nature's use of CNCs to enhance rigidity and mechanical strength in cellulosic materials, we explored similar principles to improve the properties of acrylate water-based coatings. The cCNCs, loaded at 0.
View Article and Find Full Text PDFSilica nanocontainers with rhodamine B acylhydrazone for early fluorescent detection of steel corrosion.
RSC Adv
December 2024
Research Institute for Physical Chemical Problems, Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
Article Synopsis
- Developing efficient fluorescent sensors for metal corrosion is important, but sensitive sensors can lose effectiveness when exposed to different coatings.
- Silica nanocontainers are used to encapsulate rhodamine B acylhydrazone, which acts as a pH sensor, and these nanomaterials are applied in low concentrations in water-based epoxy and acrylic coatings to detect early corrosion in steel.
- The encapsulated dye shows 4 times greater fluorescence response to corrosion compared to non-encapsulated, while also enhancing dye dispersion and coating barrier properties without needing solvents.
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