SiO2介导超疏水/超亲油杂化海绵的制备及油/水分离研究

doi:10.19964/j.issn.1006-4990.2024-0215

Abstract

Abstract:

Rational design of special surface wettability is important to improve the oil/water separation efficiency of adsorbed materials.With commercial melamine sponge as the base material and ethyl orthosilicate as the silicon source，silica（SiO₂） was supported by sol-gel method under the catalysis of acid/base.Then oleic acid was esterified with silica hydroxyl on the surface of SiO₂ under the catalysis of iron（Ⅲ） ion，and oleic acid was fixed on the surface of the sponge with SiO₂ as the medium.The organic-inorganic hybrid sponge materials were obtained.The structure and morphology of the hybrid sponge showed the effectiveness of the preparation strategy，macroporous skeleton stability and mesoporous characteristics.The contact angle measurement results showed that the grafted oleic acid invested the sponge special wettability，making it showed super hydrophobic and super lipophilic characteristics，and the water contact angle in the air could reach 154°，and the oil contact angle could reach nearly 0°.The hybrid sponge had adsorption capacity for common light oil and heavy oil，among which the adsorption capacity of trichloromethane could reach 25.86 g/g，and the cyclic adsorption performance of dimethylsilicone oil was good，and the adsorption capacity remained above 70% after 50 cycles，and the continuous separation efficiency of n-hexane/water mixture could reach 8×10⁵ L/（m³·h）.SiO₂-mediated could easily change the wettability of melamine sponge，which was an effective way to prepare high-efficiency oil/water separation hybrid materials，and had potential application value.

Key words: silica mediated, melamine sponge, superhydrophobic, superlipophilic, oil/water separation

CLC Number:

TQ127.2

MA Mingyang, CHEN Minyi, SUN Tao, XUE Bin. Study on preparation and oil/water separation performance of silica-mediated superhydrophobic/superoleophilic hybrid sponge[J]. Inorganic Chemicals Industry, 2025, 57(3): 64-70.

Figures/Tables 9

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National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on preparation and oil/water separation performance of silica-mediated superhydrophobic/superoleophilic hybrid sponge

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