Reutilization of waste printed circuit board nonmetal powders (WPCBP) has been one of the major bottlenecks in the comprehensive utilization of electronic wastes. Herein, a new reutilization strategy of WPCBP was innovatively proposed to develop a superhydrophobic coating. Typically, WPCBP@SiO₂ hybrid filler was successfully prepared by the in-situ growth of silica on WPCBP surface, and the structures and compositions of WPCBP@SiO₂ were systematically investigated by SEM, FTIR, and TGA. Then the obtained WPCBP@SiO₂ was combined with polydimethylsiloxane (PDMS) to prepare a superhydrophobic coating. The as-prepared PDMS/WPCBP@SiO₂ coatings exhibited excellent superhydrophobicity and self-cleaning ability, whose static water contact angle (WCA) is more than 150° while the sliding angle (SA) is <10°. In summary, this study provides a green and efficient reutilization strategy of WPCBP in superhydrophobic coatings, which may open up a new opportunity for the high-valued utilization of WPCBP.

中文翻译：

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废印刷电路板非金属粉末再利用新策略构建超疏水涂层

废印刷电路板非金属粉末（WPCBP）的再利用一直是电子废弃物综合利用的主要瓶颈之一。在此，创新性地提出了一种新的 WPCBP 再利用策略来开发超疏水涂层。通常，通过在 WPCBP 表面原位生长二氧化硅成功制备了WPCBP@SiO ₂杂化填料，并通过 SEM、FTIR 和 TGA 系统地研究了WPCBP@SiO ₂的结构和组成。然后将获得的WPCBP@SiO ₂与聚二甲基硅氧烷（PDMS）结合制备超疏水涂层。制备的 PDMS/WPCBP@SiO ₂涂层表现出优异的超疏水性和自清洁能力，其静态水接触角（WCA）大于150°，滑动角（SA）<10°。综上所述，本研究为WPCBP在超疏水涂层中的绿色高效再利用提供了策略，为WPCBP的高价值利用开辟了新的契机。