Jinpeng Li

Camellia oil is prone to oxidation, while paeonol suffers from poor water solubility and photothermal instability, which limit their coapplication. Although nanocellulose-based Pickering emulsions offer a promising route for codelivery, achieving satisfactory stability at relatively low particle loadings without additional hydrophobic modification or conventional surfactants remains of practical interest. To address these issues, cellulose nanocrystals (CNC) and TEMPO-oxidized cellulose nanofibrils (CNF) were used as composite stabilizers at a relatively low concentration of 0.6 wt %, with the assistance of NaCl. Hydroxyethyl cellulose (HEC) was further introduced to reinforce the continuous-phase network, thereby forming paeonol-loaded Camellia oil Pickering emulsions. The results showed that the CNC/CNF composite stabilizers, in combination with NaCl, provided effective particulate stabilization, while HEC further enhanced coalescence resistance by reinforcing the continuous-phase network. High-pressure microfluidization reduced the droplet size to approximately 3 μm. At a paeonol loading of 0.6 wt %, the emulsion showed notable antioxidant activity and potential anti-inflammatory effects in vitro, with DPPH and ABTS radical scavenging rates of 77.05% and 77.38%, and an inhibition rate of 51.56%. In this way, good storage stability was achieved with a relatively low CNC/CNF loading and without additional hydrophobic modification or surfactants, providing a green strategy for the codelivery of Camellia oil and paeonol for potential topical applications.

Uniform and reproducible Ag nanostructures are essential for flexible cellulose-based surface-enhanced Raman scattering (SERS) substrates. Herein, a flexible SERS substrate was fabricated by in situ photoreduction of a silver–ammonia precursor on TEMPO-oxidized cellulose nanofibril (TOCNF) films without external reducing agents or surfactants during Ag photoreduction. Compared with an AgNO3 precursor control, the silver–ammonia system reached its optimal SERS response within a shorter irradiation time (25 vs 70 min) and produced more homogeneous AgNP assemblies. The optimized substrate enabled detection of thiram and thiabendazole with limits of detection of 1.39 × 10–8 and 1.16 × 10–7 M, respectively while characteristic signals remained distinguishable on tomato surfaces at 0.48 and 1.61 ng/cm2. To improve thiram quantification over a broad concentration range, full-spectrum PLS, linear SVR, and RFR models were evaluated. RFR provided the best predictive performance (Rp2 = 0.9859, RMSEP = 0.1839, and RPD = 8.50) and yielded recoveries of 108.28% and 103.37% for tomato samples spiked at 96 and 9.6 ng/cm2, respectively. These results demonstrate precursor-dependent photochemical growth of SERS-active Ag nanostructures on flexible TOCNF films and the utility of full-spectrum nonlinear regression for thiram quantification.

Silicon (Si) anodes offer high capacity but suffer from large volume changes and unstable electrode–electrolyte interfaces. Conventional binders rarely provide both robust mechanical stability and efficient ion transport. Here, a multifunctional crosslinked binder (XC ₅ Ns _0.3 ) is designed via the in situ esterification between carboxyl styrene butadiene rubber (XSBR) and prelithiated carboxymethyl cellulose (CMCLi), with glycerol serving as a dual‐functional polyhydroxyl component and nitrogen‐doped carbon dots (N‐CDs) incorporated to regulate ion transport. The resulting covalent and gradient hydrogen‐bonding network delivers exceptional mechanical strength, disperses stress, and preserves electrode integrity. Meanwhile, uniformly distributed N‐CDs significantly enhance ionic conductivity (1.12 × 10 ⁻² S cm ⁻¹ ) and promote the formation of a stable, LiF‐rich solid electrolyte interphase (SEI) layer. As a result, the XC ₅ Ns _0.3 ‐based anode achieves a high initial coulombic efficiency (ICE) of 91.2% and retains 1685.1 mAh g ⁻¹ after 550 cycles at 0.2 C. A full cell with a LiNi _0.52 Co _0.2 Mn _0.28 O ₂ (NCM523) cathode further validates its practical potential. Overall, this work presents a scalable strategy that concurrently addresses the mechanical and electrochemical challenges of next‐generation high‐energy‐density lithium‐ion batteries (LIBs).

Meta-aramid paper has been extensively employed as electrical insulation due to its outstanding thermal stability and excellent dielectric properties. However, the inherent porosity and weak interfacial interactions within conventional aramid paper undermine its mechanical robustness and dielectric breakdown strength. These limitations severely restrict its deployment under complex electrical operating conditions, particularly in harsh environments. Herein, HAPNWs and Mica nanosheets were synergistically integrated into the aramid fibrous network to fabricate a novel PPMIA-HAPNWs@Mica composite paper (PPH@M) with the highly compactness and ordered architecture, possessing excellent strength and outstanding insulation performances. The obtained PPH@M exhibits a pronounced enhancement in mechanical performance compared with conventional aramid paper, achiecveing a tensile strength of 62.10 MPa and a Young’s modulus of 1.33 GPa. Notably, the incorporation of functional nanofillers effectively eliminates the open pores present in traditional aramid paper, enabling a remarkable electrical breakdown strength of 38.31 kV·mm-1. PPH@M significantly outperforms previously reported aramid paper in both tensile and electrical breakdown strength, which can be ascribed to the strong hydrogen bonding and electrostatic interactions between the components that induce an ordered layered architecture and enhance performance reliability. PPH@M exhibits exceptional performance stability under extreme conditions. It demonstrates a folding endurance of over 3000 cycles and retaining over 97% of its mechanical and electrical breakdown strength after exposure to both cryogenic and elevated temperatures, highlighting its outstanding adaptability to harsh environments. These advantageous characteristics make PPH@M as a highly promising candidate for next-generation electrical insulation applications.

Silver nanoclusters (AgNCs) have attracted considerable interest due to their optical properties and diverse applications. However, their synthesis remains challenging, primarily owing to issues of instability and the reliance on strong reducing agents. Cellulose nanocrystals (CNC) are regarded as desired candidates for encryption and anti‐counterfeiting applications owing to their modifiability, renewability, and favorable rheological properties. In this study, glutathione (GSH)‐capped AgNCs (DCNC/AgNCs@GSH) with an average size of 1.94 nm are synthesized using dialdehyde cellulose nanocrystals (DCNC) as green templates and stabilizers in an aqueous phase system. The results indicate that the obtained DCNC/AgNCs@GSH possess excellent photoluminescence properties, including a tunable Stokes shift (171–243 nm) and high fluorescence intensity (8.54 × 10 ⁵ a.u.), along with notable antibacterial performance. Expectedly, the as‐prepared DCNC/AgNCs@GSH‐based fluorescent ink exhibits multifunctional anti‐counterfeiting properties, enabling low‐cost dynamic optical encryption while performing effectively in screen printing and fingerprint recognition. Furthermore, DCNC enhances the rheological properties of the DCNC/AgNCs@GSH fluorescent ink and contributes to exceptional photostability, with only an 18.66% decrease in fluorescence intensity over 6 months. This work thus presents a DCNC‐based strategy for synthesizing structurally stable and high‐performance AgNCs, offering a novel approach for the development of AgNCs‐based optical functional materials.