Key Words:WETTABILITY; ABSORPTION; COMPOSITE
Abstract: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 (SiO2) aerogel and microporous polylactic acid (PLA) membrane were prepared firstly, then the SiO2 aerogel was deposited on the surface of PLA by self-assembly, an effective SiO2 aerogel @ PLA membrane for water-in-oil emulsions separation was prepared. Low surface energy and multi-scale roughness were achieved simultaneously by uniformly assembling SiO2 aerogel on PLA surface. SiO2 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, SiO2 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.
Volume:105
Issue:3
Translation or Not:no