Self-assembled silica aerogel-coated polylactic acid membrane for water-in-oil emulsion separation
The separation of oil-water system is of great significance to environmental protection, but the efficient separation of water-in-oil emulsions with emulsifier still faces challenges. Herein, the hydrophobic silica (SiO 2 ) aerogel and microporous polylactic acid (PLA) membrane were prepared firstly...
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Veröffentlicht in: | Journal of sol-gel science and technology 2023-03, Vol.105 (3), p.694-700 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The separation of oil-water system is of great significance to environmental protection, but the efficient separation of water-in-oil emulsions with emulsifier still faces challenges. Herein, the hydrophobic silica (SiO
2
) aerogel and microporous polylactic acid (PLA) membrane were prepared firstly, then the SiO
2
aerogel was deposited on the surface of PLA by self-assembly, an effective SiO
2
aerogel @ PLA membrane for water-in-oil emulsions separation was prepared. Low surface energy and multi-scale roughness were achieved simultaneously by uniformly assembling SiO
2
aerogel on PLA surface. SiO
2
aerogel dramatically enhanced the hydrophobicity of PLA membrane, and the in-air water contact angle was reached to 150
o
. Benefiting from the super lipophilic property in air and super hydrophobicity under oil, SiO
2
aerogel @ PLA membrane exhibited excellent separation ability for surfactant stabilized water-in-oil emulsions. This work provided experimental and theoretical basis for excellent water-in-oil emulsions separation, and showed great significance in environmental protection.
Graphical Abstract
Highlights
SiO
2
aerogel @ PLA microporous membrane was prepared by self-assembly.
The membrane possessed super hydrophobicity and the in-air water contact angle was 150
o
.
The membrane showed separation efficiency for the surfactant-stabilized water-in-oil emulsion. |
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ISSN: | 0928-0707 1573-4846 |
DOI: | 10.1007/s10971-023-06045-6 |