Preparation of PDMS permeation membrane by emulsion dilution method and its separation performance for aromatics DOI Creative Commons

M. Wang,

Fang Ni,

Ziling Teng

и другие.

AIP Advances, Год журнала: 2024, Номер 14(11)

Опубликована: Ноя. 1, 2024

Natural aroma compounds are a kind of important food additive. Taking bis(2-ethylhexyl) sodium sulfosuccinate (AOT) as the surfactant, water-in-n-heptane emulsions were prepared. Then, adopted diluter to prepare polydimethylsiloxane (PDMS) pervaporation membranes using emulsion templating method (ePDMS), which separation layer was controlled by template action drops. The ePDMS utilized separate compounds. Field-emission scanning electron microscope (FESEM) analysis revealed that surface membrane remained smooth, and white light interferometry confirmed membrane’s smoothness. FESEM cross-sectional exposed voids left evaporation emulsion, rendering more porous. Water contact angle measurements demonstrated hydrophobicity membrane, is advantageous for aromatic Fourier transform infrared spectrometry retaining original chemical properties PDMS membrane. In an ethanol–water system, permeation flux ethanol in prepared with 1 (Vwater:Vn-heptane = 1:9; mass concentration AOT 1.0 mg/ml) 90.6% higher than membranes, while factor does not change obviously. performance linalool water further studied. Results show composite at 50 °C 786 g m−2 h−1 17.69, separately increase 84.7% 27.1% compared those membranes. This indicates adding exerts significant synergistic effect on linalool.

Язык: Английский

Preparation of PDMS permeation membrane by emulsion dilution method and its separation performance for aromatics DOI Creative Commons

M. Wang,

Fang Ni,

Ziling Teng

и другие.

AIP Advances, Год журнала: 2024, Номер 14(11)

Опубликована: Ноя. 1, 2024

Natural aroma compounds are a kind of important food additive. Taking bis(2-ethylhexyl) sodium sulfosuccinate (AOT) as the surfactant, water-in-n-heptane emulsions were prepared. Then, adopted diluter to prepare polydimethylsiloxane (PDMS) pervaporation membranes using emulsion templating method (ePDMS), which separation layer was controlled by template action drops. The ePDMS utilized separate compounds. Field-emission scanning electron microscope (FESEM) analysis revealed that surface membrane remained smooth, and white light interferometry confirmed membrane’s smoothness. FESEM cross-sectional exposed voids left evaporation emulsion, rendering more porous. Water contact angle measurements demonstrated hydrophobicity membrane, is advantageous for aromatic Fourier transform infrared spectrometry retaining original chemical properties PDMS membrane. In an ethanol–water system, permeation flux ethanol in prepared with 1 (Vwater:Vn-heptane = 1:9; mass concentration AOT 1.0 mg/ml) 90.6% higher than membranes, while factor does not change obviously. performance linalool water further studied. Results show composite at 50 °C 786 g m−2 h−1 17.69, separately increase 84.7% 27.1% compared those membranes. This indicates adding exerts significant synergistic effect on linalool.

Язык: Английский

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