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<p>Monolithic, superhydrophobic material has wide application in the field of adsorption separations. Herein, a water-in-oil (W/O) high-internal-phase emulsions (HIPEs) templating method was used to prepare TiO<sub>2</sub>-containing superhydrophobic porous polymers with controllable pore sizes. By introducing acryloxy silane-modified TiO<sub>2</sub> into the oil phase, the stability of such emulsions was enhanced, and the modified TiO<sub>2</sub> could co-polymerize with other monomers and anchor onto the polymer surface. Experiments found that changing the content of hydrophobic TiO<sub>2</sub> in the emulsion components could further improve the elastic polymer’s hydrophobicity (maximum water contact angle of 153.3°), mechanical properties, and antifouling performance. Moreover, the resulting composite foam exhibited high adsorption capacity for organic pollutants (22.8&#xa0;g/g for cyclohexane, 101.6&#xa0;g/g for dichloromethane, 72.6&#xa0;g/g for toluene, and 23.0&#xa0;g/g for diesel). The composite foam showed a rapid saturated adsorption rate for various hydrophobic organic pollutants (cyclohexane saturated within 10&#xa0;s, carbon tetrachloride within 180&#xa0;s), good recyclability, and the macroporous material demonstrated a certain chemical stability under saline and acidic conditions.</p> Graphical abstract <p></p>

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Hydrophobic composite foam containing modified TiO2 obtained by emulsion templating method and its adsorption-separation properties

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Qiang Zhang,
  • Liqin Cao,
  • Xin Hu

摘要

Monolithic, superhydrophobic material has wide application in the field of adsorption separations. Herein, a water-in-oil (W/O) high-internal-phase emulsions (HIPEs) templating method was used to prepare TiO2-containing superhydrophobic porous polymers with controllable pore sizes. By introducing acryloxy silane-modified TiO2 into the oil phase, the stability of such emulsions was enhanced, and the modified TiO2 could co-polymerize with other monomers and anchor onto the polymer surface. Experiments found that changing the content of hydrophobic TiO2 in the emulsion components could further improve the elastic polymer’s hydrophobicity (maximum water contact angle of 153.3°), mechanical properties, and antifouling performance. Moreover, the resulting composite foam exhibited high adsorption capacity for organic pollutants (22.8 g/g for cyclohexane, 101.6 g/g for dichloromethane, 72.6 g/g for toluene, and 23.0 g/g for diesel). The composite foam showed a rapid saturated adsorption rate for various hydrophobic organic pollutants (cyclohexane saturated within 10 s, carbon tetrachloride within 180 s), good recyclability, and the macroporous material demonstrated a certain chemical stability under saline and acidic conditions.

Graphical abstract