Yine Ren,Zhongqiang Yu,Wen Sun,Kaixin Xu,Junzhe Fan,Lida Wang,Zhengqing Yang,Guichang Liu,Qian Wang,Junhai Luo
Simultaneously improving the corrosion protection performance and mechanical stability of coatings is a challenge in the preparation of superhydrophobic coatings. In this paper, a novel controlling sedimentation method is developed to prepare multifunctional superhydrophobic gradient coatings. The prepared gradient coating exhibits excellent superhydrophobicity with a contact angle of 156° with great chemical stability and wear resistance after the immersion of pH = 1H 2 SO 4 and pH = 10 NaOH solution for 60 days and 180 times of sandpaper grinding. In addition, a persistent high corrosion resistance to 10 wt% H 2 SO 4 solutions, and no cracking occurred after 240 cycles of -60 – 140 °C cold-thermal shock. This research has positive implications for the development and application of corrosion-protective organic coatings of heat exchanger equipment in the harsh environment of desulfurized flue gas, it can be applied to actual industrial production.
The improper disposal of waste oil and industrial oil-water emulsions presents critical ecological and energy challenges, driving the development of robust separation technologies. This study introduces a stainless steel mesh-supported polyperfluorinated ethylene-propylene/carbon nanotube (SSM-FEP/CNTs) composite membrane fabricated via a one-step thermoplastic sintering method. The innovative design leverages CNTs to create a three-dimensional bridging network within the FEP matrix, enhancing mechanical stability, optimizing pore architecture (average pore size: 0.15–0.30 μm), and establishing tubular nanostructured channels for efficient oil transport. The membrane exhibits exceptional stability in harsh environments, with < 5 % performance degradation in pH 2–14, and high temperatures (up to 100°C) during the continuous filtration tests, validated by SEM, FTIR, and TGA analyses. The one-step sintering process ensures scalability and cost-effectiveness, with a maximum flux of 52 L·m⁻²·h⁻¹ for kerosene, surpassing conventional polymer membranes. By integrating mechanical robustness, chemical inertness, and structural and transport properties, this composite membrane addresses limitations of low flux, poor durability, and complex fabrication in traditional systems, offering a sustainable solution for industrial wastewater treatment, waste oil recovery (e.g., refineries, marine applications), and closed-loop resource management. Its ability to maintain ultrahigh efficiency and durability under challenging conditions positions it as a transformative technology for environmental remediation and sustainable manufacturing.
危险品化学品经营许可证（带存储）