Liang Fang

The construction of high‐quality inorganic/organic functional premixes is a critical prerequisite for fabricating high‐performance spectrally selective films. In this study, Cs _x WO ₃ nanoparticle premixes were constructed using high‐speed shear and planetary medium‐low speed stirring processes across three matrices with gradient polarities, non‐polar PE, weakly polar EVA, and strongly polar PET. Quantitative spectral analysis revealed a distinct “Polarity‐Matching” dispersion mechanism. In the PE system, the high‐speed shear processes a film with an optimal near‐infrared (NIR) blocking rate of ~73% but a limited visible light transmittance (T _vis ) of ~52% due to “island‐like” agglomeration, whereas the medium‐low speed process failed to achieve effective dispersion, indicating a reliance on high‐intensity mechanical shear. In the EVA system, high‐speed shearing achieved a T _vis of ~61% with an NIR blocking rate of ~64%; notably, the optimized medium‐low speed planetary stirring (at 45°C) significantly improved T _vis to ~73% (with ~60% NIR blocking). Most notably, the PET system utilizing ethyl acetate‐based slurry established a robust “chemical anchoring” effect, endowing the premix with thermodynamic stability and allowing the PET film to maintain superior performance under both high‐speed (T _vis ~82%, NIR blocking ~78%) and low‐energy ambient planetary stirring (T _vis ~79%, NIR blocking ~84%) processes. This work reveals that the dependence on mechanical shear force decreases significantly as matrix polarity increases. This insight validates the feasibility of replacing energy‐intensive shear with thermodynamic regulation in polar systems, thereby providing critical guidelines for the low‐cost, scalable manufacturing of transparent heat‐insulating materials.

Photovoltaic modules require efficient sunlight modulation, including enhanced visible transmittance and conversion of unused ultraviolet light. This study develops a synthetic optical coating that achieves both functions by integrating down-conversion BAM (BaMgAl₁₀O₁₇:Eu²⁺, Mn²⁺) nanophosphors into a silica anti-reflection sol. The key novelty lies in a synergistic surface engineering strategy that decouples dispersion stabilization from luminescence protection. Five dispersants are systematically compared under combined ball and sand milling. The polyester-modified acrylic long-chain dispersant (DK062) yields a stable nanodispersion with an average particle size of 228 nm and a Zeta potential of −7.61 mV, effectively suppressing re-agglomeration while retaining high photoluminescence. Subsequent surface modification with KH570 grafts a dense silane passivation layer via Si–O–M covalent bonds, further increasing the photoluminescence intensity by 1.39-fold. The optimized nanophosphors are incorporated into a commercial anti-reflection sol and dip-coated onto photovoltaic glass. At a doping concentration of 2‰ and a withdrawal speed of 8 mm/s, the resulting DCSAR coating exhibits an average transmittance of 91.16%—slightly higher than that of the pure anti-reflection coating (90.96%)—while showing strong green emission at 515 nm. Industrial on-site testing further demonstrates an average transmittance of 94.20%–94.31% with uniform green emission. This work provides a scalable route to fabricate highly transparent, light-converting anti-reflection coatings by combining dispersant-assisted milling and silane passivation.

The rapid development of flexible printing technology highlights the critical importance of optimizing materials for flexible printing plates. This study investigates the photochemical crosslinking process of styrene‐butadiene‐styrene (SBS) block copolymers with various acrylate monomers, aiming to enhance the performance of SBS‐based flexographic printing plates. A series of SBS formulations was prepared with monomers differing in structure and functionality, and their crosslinking behavior, mechanical properties, and plate‐making performance were systematically analyzed. The results show that monomers with higher functionality significantly increased the density of the crosslinked network, improving tensile strength (up to 13.8 ± 0.5 MPa) and Shore hardness (up to 74 A), while reducing elongation at break. The introduction of rigid structures in monomers further enhanced the mechanical stiffness of the material. Under optimized processing parameters, the material successfully replicated patterns with a resolution of 175 Lines Per Inch (LPI) and achieved a double‐bond conversion rate of 93.2% ± 0.9% after UV exposure. This research demonstrates the tunability of SBS‐acrylate crosslinked networks and provides a comprehensive understanding of the relationships between monomer structure, crosslinking behavior, and material performance.

In pursuit of enhancing the photostability of chlorophyll, a novel organic-inorganic hybrid pigment has been synthesized via a supramolecular intercalation assembly method, incorporating cerium-ion-doped hydrotalcite as the host matrix and chlorophyll as the intercalated guest molecule. This innovative pigment amalgamates the vivid coloration properties of organic dyes with the robust stability characteristic of inorganic substances. Determined from the detailed investigation of the structural evolution of chlorophyll during photodegradation, the dual physicochemical protection mechanism is critical to the advancement of chlorophyll photostability. It leverages the oxygen barrier attributes of the hydrotalcite's laminate structure and the ultraviolet light absorption and scattering capabilities of CeO₂ nanoparticles formed in situ. Furthermore, Ce-doping introduces a redox cycle between Ce⁴⁺ and Ce³⁺ ions, which serves as a chemical defense by neutralizing reactive oxygen species that emerge during chlorophyll degradation. This multifaceted approach results in a substantial enhancement of photostability, with the hybrid pigment containing 0.3 Ce doped content, demonstrating a mere 5.90% alteration in reflectance at the 635 nm peak after 250 h of UV-accelerated aging. This breakthrough provides a dual physicochemical protective strategy that not only significantly prolongs the lifespan of chlorophyll pigments but also holds potential for broadening their application scope in various industries, including plastics and coatings, where color fastness and durability are paramount.