Zhang Lie, Feng Yongbao, Li Shuzhi, Li Liang, Yuan Bo
Rocket Force University of Engineering, Xi'an, 710025, Shaanxi Province, China.
Heliyon. 2024 Jul 15;10(14):e34653. doi: 10.1016/j.heliyon.2024.e34653. eCollection 2024 Jul 30.
In this study, boron nitride nanotubes (BNNTs) were utilized as covering and reinforcing materials owing to their extraordinary insulation and extremely high hydrophobicity. The gas-liquid-solid annealing process was used to manufacture the BNNT stainless-steel filter, with a 120 mesh stainless steel filter serving as the substrate and BO as the raw material. Scanning electron microscopy showed that the average diameter of the nanotubes was 0.40 μm. The BNNTs were bamboo shaped, and the BNNT stainless-steel filter was superhydrophobic, with a water contact angle was 150.49°. The materials demonstrated good separation performance, as indicated by the separation results obtained under four different test conditions (0 and 0.3 MPa, 3 and 10 mL/min). The solid-liquid separation effect of the BNNT stainless-steel filter was better than that of the Teflon filter. In oil-water separation experiments with varying water contents (1.2 and 5.8 wt%), the BNNT stainless-steel filter was more hydrophobic. Based on the results, the role of the hydrodynamic method in the separation of two superhydrophobic materials is discussed. The method introduced in this study can serve as a reference for the application of other filtration separation technologies. Furthermore, the superior separation performance of the superhydrophobic BNNT stainless-steel filter may enable the quick, effective, and continuous collection of water contaminated with oil, giving it a wide range of potential applications.
在本研究中，由于其卓越的绝缘性和极高的疏水性，氮化硼纳米管（BNNTs）被用作覆盖和增强材料。采用气-液-固退火工艺制造BNNT不锈钢过滤器，以120目不锈钢过滤器为基材，以氧化硼为原料。扫描电子显微镜显示纳米管的平均直径为0.40μm。BNNTs呈竹形，BNNT不锈钢过滤器具有超疏水性，水接触角为150.49°。在四种不同测试条件（0和0.3MPa，3和10mL/min）下获得的分离结果表明，该材料具有良好的分离性能。BNNT不锈钢过滤器的固液分离效果优于聚四氟乙烯过滤器。在不同含水量（1.2和5.8wt%）的油水分离实验中，BNNT不锈钢过滤器疏水性更强。基于这些结果，讨论了流体动力学方法在两种超疏水材料分离中的作用。本研究中介绍的方法可为其他过滤分离技术的应用提供参考。此外，超疏水BNNT不锈钢过滤器的卓越分离性能可能使含油污水能够快速、有效且连续地收集，使其具有广泛的潜在应用。
