Superhydrophobic materials have wide application prospects in areas such as self-cleaning, anti-corrosion, anti-icing, anti-bioadhesion, and underwater drag reduction. However, the material has the disadvantages of single function, inability to be rapidly prepared on a large scale, easy destruction of the surface structure resulting in failure of the material, poor durability, and the like, thereby severely limiting its application.
Zhang Zhaozhu, a researcher at the Lanzhou Institute of Chemical Physics at the Chinese Academy of Sciences, developed a new process for the simple and efficient preparation of durable superhydrophobic materials, which overcomes the problems of surface damage, poor durability, and difficulty in large-scale preparation of superhydrophobic materials. They can quickly prepare superhydrophobic materials by soaking fabrics in a mixed dispersion of polytetrafluoromethane and fluorinated graphite and heating and curing. The resulting material has a contact angle of 157.7°, is resistant to sandpaper, and has excellent superhydrophobic properties after severe mechanical damage. In addition, the material also has a rapid, repeatable self-repairing function. After the destruction of the surface, the hydrophobic material can be migrated by heating to regenerate a superhydrophobic surface, achieve rapid self-repair, and the superhydrophobic properties after dyeing are not changed, thus further Expanded its application range.
To further enhance the stability and versatility of the material, the researchers combined the superhydrophobic material with the preparation of the porous material. By controlling the solvothermal synthesis conditions, a one-pot process was used to prepare a high specific surface area and a stable superhydrophobic function. Multi-pore polymer.
Compared with the traditional method, the method does not need to prepare a template, does not require post-treatment, the material multi-hole structure is easy to adjust, and the preparation material is non-toxic, low in price, and the preparation method is green and environmentally friendly. Compared with the super-hydrophobic material obtained by surface treatment, the material has an overall super-hydrophobic property, which can be scratched and cut arbitrarily, and can withstand the impact of rapid water flow for a long time. In addition, super-hydrophobic products can be quickly obtained on different substrate materials (paper, fabrics, gloves, etc.) by rubbing. The resulting material has excellent overall stability under a variety of harsh environments (high temperature and high humidity, strong acid and alkali and ultraviolet radiation).
The above synthesis method is green and efficient, and the obtained material has excellent versatility and comprehensive stability, and has wide application prospects. Relevant research results were published in "composites science and technology" and "green chemistry" respectively.
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