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Дата издания
01.08.2025Область исследования
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The development of durable and efficient membranes is essential for addressing environmental pollution caused by industrial oil spills and oily wastewater. This study presents a simple surface modification approach using a sol-gel dip-coating technique to fabricate hydrophobic cellulose membranes (CMs) for oil-water separation. Two silane agents—hexadecyltrimethoxysilane (HDTMS) and triethoxy(octyl)silane (OTES)—were separately introduced into the sol-gel reaction to enhance membrane hydrophobicity and separation performance. Results showed that cellulose membranes modified with OTES (MCMs-OTES) exhibited superior oil-water separation efficiency compared to those treated with HDTMS (MCMs-HDTMS), despite having lower water contact angles (WCAs). This finding suggests that surface wetting properties alone do not solely determine separation performance; instead, the presence and distribution of silicon nanoparticles formed during the sol-gel process play a significant role. Additionally, the impact of different CM pore sizes (2.5 μm, 5.0 μm, 20 μm, and 20–25 μm) on separation performance was investigated. Among these, MCMs-OTES with the largest pore size (20–25 μm) achieved the highest average separation flux (14088.7 L m−2 h−1) and efficiency (96.1 %). Notably, both HDTMS- and OTES-modified membranes exhibited excellent fouling resistance and long-term durability, maintaining high separation efficiencies over time. © 2025 Elsevier LtdDOI
10.1016/j.chemosphere.2025.144319Тип публикаций
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Международные публикации ученых SU
Scopus
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