Advanced materials with special wettability have attracted wide attention for their potential application in environmental remediation, catalysis or superfluid now. This contribution reports a straightforward and low-cost high-performance methodology for the preparation of carbon fiber felt with selective superwettability and fire resistance. The functionalized carbon fiber felt (UV-CFF) is prepared by a simple UV-O₃ treatment process for the enhancement of its superamphiphilicity in air and superoleophobicity underwater, the underwater contact angles of the organics is over 155°. Subsequently, surface functionalization of UV-CFF with 4-trifluoromethyldiazobenzene hydrochloride is carried out. Its surface could be effectively modified with aryl and carbon–fluorine groups through diazonium chemistry to obtain a superhydrophobic carbon fiber felt (f-CFF) with water contact angle of 152.5 ± 0.8°. Both of the UV-CFF and f-CFF samples exhibits effective oil/water separation behavior. Benefiting from the selective superwettability, the two samples provide the potential to selectively eliminate underwater oily phases and emulsions under different hydraulic pressures. For UV-CFF, its rejection of oil reaches 100%, and the rejection of water for f-CFF reaches 98.21 ± 0.7%. The adsorption capacities of different types of organic solvents for f-CFF is 4–14 g g⁻¹, and its demulsification capacity can reach to 99.9%. Due to its corrosion resistance, facile fabrication technique, cycle stability and flame retardancy, the carbon felts hold great promise for potential applications in environmental remediation of water.

具有特殊润湿性的先进材料因其在环境修复，催化或超流体方面的潜在应用而受到广泛关注。这一贡献报告了一种简单而低成本的高性能方法，用于制备具有选择性超湿性和耐火性的碳纤维毡。功能性碳纤维毡（UV-CFF）通过简单的UV-O ₃制备为了增强其在空气中的超两亲性和在水下的超疏油性的处理过程，有机物的水下接触角超过155°。随后，用4-三氟甲基重氮苯盐酸盐对UV-CFF进行表面官能化。通过重氮化学反应可以有效地用芳基和碳氟基团修饰其表面，从而获得水接触角为152.5±0.8°的超疏水碳纤维毡（f -CFF）。UV-CFF和f-CFF样品表现出有效的油/水分离行为。得益于选择性的超湿性，这两个样品提供了在不同水压下选择性消除水下油相和乳液的潜力。对于UV-CFF，其对油的截留率达到100％，而对f -CFF的截水率达到98.21±0.7％。不同类型有机溶剂对f -CFF的吸附能力为4–14 g g ^-1，其破乳能力可达99.9％。由于其耐腐蚀，易于制造的技术，循环稳定性和阻燃性，碳毡在水环境修复方面具有潜在的应用前景。