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<p>Polydimethylsiloxane (PDMS) considered a low surface energy material is widely used in (super)hydrophobic modification. In this paper, the high hydrophobic melamine sponges (MS) were modified with commercial aminopropyl functionalized polydimethylsiloxane (NH<sub>2</sub>-PDMS) with different molecular mass. The chemical composition, surface morphology, and wettability of the NH<sub>2</sub>-PDMS-modified MS were investigated by X-ray photoelectron spectroscopy (XPS), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and contact angle test. Owing to the porous structure and high hydrophobicity, NH<sub>2</sub>-PDMS-modified MS possesses remarkable absorption capacity (ranging from 46 to 155 times their own mass). Simultaneously, it can effectively separate oil-water mixtures with high separation efficiencies exceeding 98.2%. NH<sub>2</sub>-PDMS-modified MS has no obvious change after 10 cycles of oil-water separation. The results demonstrate PDMS molecular mass on surface can revise material properties and achieve high separation efficiencies in oil-water separation.</p>

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Commercial polydimethylsiloxane modified melamine sponge for highly efficient oil-water separation

  • 期刊论文

  • 发表日期：

    2025年4月15日

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  • Gen Bai,
  • Liang Qian,
  • De-peng Ma,
  • Ying-xin He,
  • Xin Zhou,
  • Cui-hong Lu,
  • Yue-fei Zhang,
  • Jing-lin Tan

摘要

Polydimethylsiloxane (PDMS) considered a low surface energy material is widely used in (super)hydrophobic modification. In this paper, the high hydrophobic melamine sponges (MS) were modified with commercial aminopropyl functionalized polydimethylsiloxane (NH2-PDMS) with different molecular mass. The chemical composition, surface morphology, and wettability of the NH2-PDMS-modified MS were investigated by X-ray photoelectron spectroscopy (XPS), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and contact angle test. Owing to the porous structure and high hydrophobicity, NH2-PDMS-modified MS possesses remarkable absorption capacity (ranging from 46 to 155 times their own mass). Simultaneously, it can effectively separate oil-water mixtures with high separation efficiencies exceeding 98.2%. NH2-PDMS-modified MS has no obvious change after 10 cycles of oil-water separation. The results demonstrate PDMS molecular mass on surface can revise material properties and achieve high separation efficiencies in oil-water separation.