Hao Xiaoru, Cheng Zhihao, Xie Jun, Zhang Yu, Zheng Haikun, Zhou Jiahui, Sheng Wei
School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, 454003, People's Republic of China.
Hami Vocational and Technical College, Hami, 839000, People's Republic of China.
Nanotechnology. 2024 Jan 30;35(16). doi: 10.1088/1361-6528/ad1df3.
In this paper, a preparation method of superhydrophobic composites of oxidized multi-walled carbon nanotubes modified by stearic acid (SA) is proposed. Hydroxylated multi-walled carbon nanotubes (HMWCNTs) were obtained by oxidizing multi-walled carbon nanotubes with potassium dichromate to give them hydroxyl groups on the surface. Subsequently, the carboxyl group in the SA molecule was esterified with the hydroxyl group on the HMWCNTs. SA molecules were grafted onto the surface of multi-walled carbon nanotubes. SA modified oxidized multi-walled carbon nanotubes (SMWCNT) superhydrophobic composites were obtained. The results show that the water contact angle (WCA) of superhydrophobic composites can reach up to 174°. At the same time, the modified nanocomposites have good anti-icing and corrosion resistance. After low temperature delayed freezing test, the freezing extension time of the nanocomposite film is 30 times that of the smooth surface. Under strong acid and alkali conditions, the superhydrophobic nanocomposites still maintain good superhydrophobicity. The nanocomposites may have potential applications in the preparation of large-scale superhydrophobic coatings.
本文提出了一种硬脂酸（SA）改性氧化多壁碳纳米管超疏水复合材料的制备方法。通过用重铬酸钾氧化多壁碳纳米管使其表面带有羟基，从而得到羟基化多壁碳纳米管（HMWCNTs）。随后，SA分子中的羧基与HMWCNTs表面的羟基发生酯化反应。SA分子接枝到多壁碳纳米管表面，得到SA改性氧化多壁碳纳米管（SMWCNT）超疏水复合材料。结果表明，超疏水复合材料的水接触角（WCA）可达174°。同时，改性纳米复合材料具有良好的抗结冰和耐腐蚀性能。经过低温延迟冷冻试验，纳米复合薄膜的冷冻延长时间是光滑表面的30倍。在强酸和强碱条件下，超疏水纳米复合材料仍保持良好的超疏水性。该纳米复合材料在大规模超疏水涂层的制备中可能具有潜在应用。
