Hydrophobic modification of sodium alginate (SA) foams via a simple freeze-drying and post cross-linking induced by zirconium (Zr) ions was developed. All results demonstrated that Zr ions not only constructed surface microstructure but also lowered surface energy of foams, leading to the hydrophobic character. Hydrophobic and oleophilic foams showed excellent adsorption capacities for different oils and organic solvents (11.2–25.9 g/g). Furthermore, SA solution can be also coated on porous substrates, such as melamine sponges (MS) and Nylon strainers (NS), to give hydrophobic modification by Zr ion crosslinking. These excellent performances made them a promising for oil adsorption and cleanup.

通过简单的冷冻干燥和锆（Zr）离子诱导的后交联，对海藻酸钠（SA）泡沫进行了疏水改性。所有结果表明，Zr离子不仅可以构成表面微观结构，而且可以降低泡沫的表面能，从而导致其疏水性。疏水性和亲油性泡沫对不同的油和有机溶剂表现出出色的吸附能力（11.2–25.9 g / g）。此外，也可以将SA溶液涂覆在多孔基材上，例如三聚氰胺海绵（MS）和尼龙滤网（NS），以通过Zr离子交联进行疏水改性。这些出色的性能使其成为油吸附和净化的有前途的工具。