화학공학소재연구정보센터
Separation and Purification Technology, Vol.212, 21-29, 2019
Novel electrospun TPU/PDMS/PMMA membrane for phenol separation from saline wastewater via membrane aromatic recovery system
Electrospun poly(dimethyl siloxane)/poly(methyl methacrylate) (PDMS/PMMA) membrane (EPPM) is an emerging material in membrane aromatic recovery system (MARS) for phenol separation from saline wastewater. However, its application and performance in MARS are hindered by poor mechanical property. To solve this issue, thermoplastic polyurethanes (TPU) was mixed with PDMS and PMMA to fabricate novel electrospun TPU/PDMS/PMMA membrane (ETPPM). Membrane morphologies showed that intrinsically random oriented fibers of EPPM were gradually changed into the self-bundled fiber yams with point-bonded structure, which led to the tensile strength and elongation at break of ETPPM-3 increased 12.6 times and 89.9%, respectively after 1.5 g TPU addition. Furthermore, ETPPM-3 presented a simultaneous organophilic and hydrophobic surface with phenol static contact angle of 0 degrees and NaCl solution static contact angle of 143.4 degrees, indicating its potential in phenol separation from saline wastewater. After 24 h MARS operation, 498.3 mg L-1 of phenol was separated from the initial phenol saline wastewater (2.0 g L-1 phenol and 10.0 g L-1 NaCl) with a conductivity increase of 21.2 mu s cm(-1). As a result, 24.9% of phenol recovery and 99.86% of salt rejection were achieved with mean phenol mass transfer coefficient of 7.3 x 10(-7) m s(-1) and flux of 4.4 x 10(-4) kg m(-2) S-1.