Luminescent and Transparent Wood Composites Fabricated by Poly(methyl methacrylate) and γ‑Fe₂O₃@YVO₄:Eu³⁺ Nanoparticle Impregnation

Natural wood is functionalized using the index matching poly­(methyl methacrylate) (PMMA) and luminescent γ-Fe₂O₃@YVO₄:Eu³⁺ nanoparticles to form a novel type of luminescent and transparent wood composite. First, the delignified wood template was obtained from natural wood through a lignin removal process, which can be used as a support for transparent polymer and phosphor nanoparticles. Then, the functionalization occurs in the lumen of wood, which benefits from PMMA that fills the cell lumen and enhances cellulose nanofiber interaction, leading to wood composites with excellent thermal properties, dimensional stability, and mechanical properties. More importantly, this wood composite displays a high optical transmittance in a broad wavelength range between 350 and 800 nm, magnetic responsiveness, and brightly colored photoluminescence under UV excitation at 254 nm. The unique properties and green nature of the luminescent wood composite have great potential in applications including green LED lighting equipment, luminescent magnetic switches, and anti-counterfeiting facilities

Legislative Documents

Also, variously referred to as: House bills; House documents; House legislative documents; legislative documents; General Court documents

Coherent-Interface-Assembled Ag₂O‑Anchored Nanofibrillated Cellulose Porous Aerogels for Radioactive Iodine Capture

Nanofibrillated cellulose (NFC) has received increasing attention in science and technology because of not only the availability of large amounts of cellulose in nature but also its unique structural and physical features. These high-aspect-ratio nanofibers have potential applications in water remediation and as a reinforcing scaffold in composites, coatings, and porous materials because of their fascinating properties. In this work, highly porous NFC aerogels were prepared based on <i>tert</i>-butanol freeze-drying of ultrasonically isolated bamboo NFC with 20–80 nm diameters. Then nonagglomerated 2–20-nm-diameter silver oxide (Ag₂O) nanoparticles (NPs) were grown firmly onto the NFC scaffold with a high loading content of ∼500 wt % to fabricate Ag₂O@NFC organic–inorganic composite aerogels (Ag₂O@NFC). For the first time, the coherent interface and interaction mechanism between the cellulose I_β nanofiber and Ag₂O NPs are explored by high-resolution transmission electron microscopy and 3D electron tomography. Specifically, a strong hydrogen between Ag₂O and NFC makes them grow together firmly along a coherent interface, where good lattice matching between specific crystal planes of Ag₂O and NFC results in very small interfacial straining. The resulting Ag₂O@NFC aerogels take full advantage of the properties of the 3D organic aerogel framework and inorganic NPs, such as large surface area, interconnected porous structures, and supreme mechanical properties. They open up a wide horizon for functional practical usage, for example, as a flexible superefficient adsorbent to capture I^– ions from contaminated water and trap I₂ vapor for safe disposal, as presented in this work. The viable binding mode between many types of inorganic NPs and organic NFC established here highlights new ways to investigate cellulose-based functional nanocomposites

Coherent-Interface-Assembled Ag₂O‑Anchored Nanofibrillated Cellulose Porous Aerogels for Radioactive Iodine Capture

Nanofibrillated cellulose (NFC) has received increasing attention in science and technology because of not only the availability of large amounts of cellulose in nature but also its unique structural and physical features. These high-aspect-ratio nanofibers have potential applications in water remediation and as a reinforcing scaffold in composites, coatings, and porous materials because of their fascinating properties. In this work, highly porous NFC aerogels were prepared based on <i>tert</i>-butanol freeze-drying of ultrasonically isolated bamboo NFC with 20–80 nm diameters. Then nonagglomerated 2–20-nm-diameter silver oxide (Ag₂O) nanoparticles (NPs) were grown firmly onto the NFC scaffold with a high loading content of ∼500 wt % to fabricate Ag₂O@NFC organic–inorganic composite aerogels (Ag₂O@NFC). For the first time, the coherent interface and interaction mechanism between the cellulose I_β nanofiber and Ag₂O NPs are explored by high-resolution transmission electron microscopy and 3D electron tomography. Specifically, a strong hydrogen between Ag₂O and NFC makes them grow together firmly along a coherent interface, where good lattice matching between specific crystal planes of Ag₂O and NFC results in very small interfacial straining. The resulting Ag₂O@NFC aerogels take full advantage of the properties of the 3D organic aerogel framework and inorganic NPs, such as large surface area, interconnected porous structures, and supreme mechanical properties. They open up a wide horizon for functional practical usage, for example, as a flexible superefficient adsorbent to capture I^– ions from contaminated water and trap I₂ vapor for safe disposal, as presented in this work. The viable binding mode between many types of inorganic NPs and organic NFC established here highlights new ways to investigate cellulose-based functional nanocomposites