Li Qian, Wu Qian, Huang Ri, Wang Jinmei, Shen Guodong, Zhi Chao, Wu Lei, Wei Xia
School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China.
Key Laboratory of Functional Textile Material and Product, Ministry of Education, Xi'an Polytechnic University, Xi'an 710048, Shaanxi, China.
Langmuir. 2024 Sep 3;40(35):18589-18597. doi: 10.1021/acs.langmuir.4c02026. Epub 2024 Aug 22.
Superhydrophobic coatings have broad applications in a variety of industries. By using a low-surface-energy material and creating nanoscale roughness, a superhydrophobic surface can be produced. To overcome the health and environmental concerns of fluorine-based materials and the limitations of large-scale rough microstructure fabrication, a poly(dimethylsiloxane) (PDMS)-based hierarchical superhydrophobic fabric coating prepared by simple thermal treatment and electrostatic flocking technology was introduced in this study. High-temperature thermal treatment is employed to create PDMS nanoparticle-decorated carbon fibers, which are further vertically implanted onto the surface of cotton fabric via electrostatic flocking technology. The environmentally friendly PDMS nanoparticles were adopted as low-surface-energy materials, and the electrostatic flocking technology was utilized to generate a vertically aligned carbon fiber array coating, mimicking a lotus leaf-like superhydrophobic surface microstructure. Therefore, an ultrahigh water contact angle of 173.9 ± 2.8° and a low sliding angle of 1 ± 0.5° can be obtained by the fabric coating with a PDMS-to-carbon fiber ratio of 20:1. The prepared superhydrophobic fabric also exhibits an excellent self-cleaning property and great durability after 60 cycles of washing. Through commercially available thermal treatment and electrostatic flocking processes, this strategy for fabricating fluorine-free superhydrophobic fabric can be easily scaled up for commercial manufacturing and promotes the design of superhydrophobic coatings for other substrates.
超疏水涂层在各种行业中都有广泛应用。通过使用低表面能材料并制造纳米级粗糙度，可以制备出超疏水表面。为了克服氟基材料的健康和环境问题以及大规模粗糙微结构制造的局限性，本研究介绍了一种通过简单热处理和静电植绒技术制备的聚二甲基硅氧烷（PDMS）基分级超疏水织物涂层。采用高温热处理来制备PDMS纳米颗粒修饰的碳纤维，然后通过静电植绒技术将其进一步垂直植入棉织物表面。采用环保的PDMS纳米颗粒作为低表面能材料，并利用静电植绒技术生成垂直排列的碳纤维阵列涂层，模仿荷叶状超疏水表面微结构。因此，当PDMS与碳纤维的比例为20:1时，织物涂层可获得173.9±2.8°的超高水接触角和1±0.5°的低滑动角。制备的超疏水织物在经过60次洗涤循环后还表现出优异的自清洁性能和良好的耐久性。通过市售的热处理和静电植绒工艺，这种制备无氟超疏水织物的策略可以很容易地扩大规模用于商业生产，并推动其他基材超疏水涂层的设计。
