The leakage of oil and organic solvents has emerged as the primary factor of water resources contamination and environmental degradation, causing an urgent and desirable quest for widely exploring and developing eco-friendly materials with hydrophobicity and lipophilicity. Herein, we presented a biomass-based separator composed of poly(vinyl butyral) (PVB) and natural Juncus effusus (JE) which effectively separated oil-water mixtures, to address the aforementioned issue. The as-prepared PVB/JE-based separator, benefiting from the microporous, inner three-dimensional (3D) structure, and natural wettability of JE fiber, exhibits satisfied oil absorption and separation capabilities. The hydrophobic porous in PVB/JE can effectively block the water within the oil, while providing saturated oil absorption capacity. Furthermore, the separator can also efficient separate water in multiple types of water-in-oil surfactant-stabilized emulsion (separation efficiency > 93%). After repeated use (10 cycles) or continuous filtration (20 min), the separator maintained good separation efficiency ( > 83%) and flux ( > 2000 L m −2 h −1 ). The PVB/JE-based separator exhibited satisfied potential for the rational utilization of biomass materials and application in oil/water separation, owing to its convenient manufacturing process, high separation efficiency, and eco-friendly raw material.
Wei Wang,Qilin Guo,Zhe Wang,Donald B. Dingwell,Wenjia Song
Molten deposits originating from siliceous debris such as airborne dust, sand, or volcanic ash entrained into the intake air, represent a critical threat to the durability of thermal barrier coatings (TBCs). Such systems are usually approximated experimentally by on calcium-magnesium aluminosilicate melts (CMAS). While extensive studies have elucidated CMAS corrosion from the terrestrial sources listed above, the role of sea salts – ubiquitous in costal environments – remains unclear. Here, we investigate the effect of sea salt from four China sea regions on CMAS corrosion of TBCs. By integrating high-temperature wetting behavior, microstructural analysis and first-principles calculation, we demonstrate that the presence of sea salt accelerates TBC degradation and that its concentration governs its impact on CMAS melt fluidity, spreading, and degradation of TBCs. An optimized CMAS model is proposed to guide future corrosion assessments and design TBCs with improved tolerance to salt-accelerated degradation under coastal service conditions.
危险品化学品经营许可证（带存储）