Wang Yu, Huang Jin-Tian
Key Laboratory of Resource Fiber Utilization of Psammophytes, Inner Mongolia Agricultural University, Hohhot 010018, China.
Materials (Basel). 2022 Mar 16;15(6):2179. doi: 10.3390/ma15062179.
The addition of toxic substances and poor durability severely limit the market applications of superhydrophobic coatings in the oil−water-separation industry, anti-icing, and self-cleaning surfaces. In order to solve the above problems, a stable, strong, fluorine-free superhydrophobic coating was prepared according to natural inspiration. In this study, polydivinylbenzene (PDVB) was produced by the hydrothermal method, and micro-nanoparticle clusters composed of PDVB particles of different sizes were prepared by controlling the ratio of raw materials, which was then attached to the substrate surface by a simple spraying technique. A rough coating with a lotus-leaf-like layered protruding structure was constructed by depositing particle clusters of different sizes. In the end, the prepared coating showed attractive superhydrophobicity, with a maximum contact angle (CA) that reached up to 160°. In addition, the coating had long-lasting superhydrophobic properties in various environments, such as common liquid and acidic and alkaline solutions. Moreover, in the oil−water-separation process, the superhydrophobic filter paper was still able to obtain a separation efficiency of more than 85% after being used 50 times, and it maintained a contact angle of >150°. At the same time, the coating had excellent dye resistance and self-cleaning performance.
有毒物质的添加和耐久性差严重限制了超疏水涂层在油水分离行业、防冰和自清洁表面的市场应用。为了解决上述问题，根据自然灵感制备了一种稳定、坚固的无氟超疏水涂层。在本研究中，通过水热法制备聚二乙烯基苯（PDVB），通过控制原料比例制备了由不同尺寸的PDVB颗粒组成的微纳米颗粒簇，然后通过简单的喷涂技术将其附着在基材表面。通过沉积不同尺寸的颗粒簇构建了具有荷叶状分层突出结构的粗糙涂层。最终，制备的涂层表现出诱人的超疏水性，最大接触角达到160°。此外，该涂层在各种环境中，如普通液体、酸性和碱性溶液中，都具有持久的超疏水性能。而且，在油水分离过程中，超疏水滤纸使用50次后仍能获得超过85%的分离效率，并且保持大于150°的接触角。同时，该涂层具有优异的耐染性和自清洁性能。
