Abstract
In recent years, the frequent occurrence of oil spills and the excessive discharge of oily wastewater have caused serious damage to the environment. Therefore, the development of oil/water separation materials has attracted widespread attention. Here, we have successfully synthesized cellulose aerogels (CAs) based on a green and simple LiBr system and modified the CAs with methyltrimethoxysilane (MTMS) for the fabrication of hydrophobized cellulose II aerogels (HCAs). The prepared HCAs have low density (0.021–0.039 g/cm3), high porosity (97.6–98.7 %) and hierarchical porous structure. The water contact angle of the HCAs was 150°±5°, exhibiting the excellent hydrophobic and lipophilic properties of the HCAs. Oil/water separation experiments have shown that HCAs has outstanding separation efficiency of over 96 % for a variety of oil/water mixtures. Furthermore, the HCAs also exhibited excellent reusability for long-term use. HCAs are promising for a wide range of practical applications in oil–water separation, including oil/chemical spills and industrial effluent discharge, owing to the green and facile preparation process, excellent separation efficiency and superior reusability.
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