TY - JOUR
T1 - Interlayer-modulated polyamide composite membrane for organic solvent nanofiltration
AU - Zha, Zhiyuan
AU - He, Pengpeng
AU - Zhao, Song
AU - Guo, Rui
AU - Wang, Zhi
AU - Wang, Jixiao
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4/5
Y1 - 2022/4/5
N2 - In this work, sandwich-like polyamide (PA) organic solvent nanofiltration (OSN) composite membranes were prepared upon hydrolyzed polyacrylonitrile (HPAN) substrates having interlayers of networked polydopamine (PDA), chained polyaniline (PANI) and porous covalent organic frameworks (COFs). The PA selective layer generated by interfacial polymerization (IP) of 1,3,5-benzenetricarbonyl trichloride (TMC) and polyethyleneimine (PEI). The surface morphology and hydrophilicity of HPAN substrate, and subsequent IP process was successfully regulated by these interlayers. Radar chart representation of the characteristic values of Interlayer/HPAN substrate, PA layer and PA/Interlayer/HPAN OSN membrane was described and analyzed. Compared with the low permeance of PA/PDA/HPAN OSN membrane, PA/PANI/HPAN OSN membrane displayed quite high ethanol permeance (3.1 L∙m−2 h−1 bar-1) and acetone permeance (12.4 L∙m−2 h−1 bar-1), owing to its thinner and rougher PA selective layer. Furthermore, PA/TpTD/HPAN OSN membranes had superior separation performance with 99.0% of rejections to dyes having molecular weights above 350.4 Da, and 95.0% of rejections to crude drugs and natural pigments. Moreover, PA/Interlayer/HPAN OSN composite membranes maintained excellent anti-fouling performance, long-term stability and chemical resistance under strong acidic solution. Therefore, the polymeric interlayers with different structures could manipulate the IP process and provide new insight for preparing of PA based OSN composite membranes with excellent-performance and structural-stability.
AB - In this work, sandwich-like polyamide (PA) organic solvent nanofiltration (OSN) composite membranes were prepared upon hydrolyzed polyacrylonitrile (HPAN) substrates having interlayers of networked polydopamine (PDA), chained polyaniline (PANI) and porous covalent organic frameworks (COFs). The PA selective layer generated by interfacial polymerization (IP) of 1,3,5-benzenetricarbonyl trichloride (TMC) and polyethyleneimine (PEI). The surface morphology and hydrophilicity of HPAN substrate, and subsequent IP process was successfully regulated by these interlayers. Radar chart representation of the characteristic values of Interlayer/HPAN substrate, PA layer and PA/Interlayer/HPAN OSN membrane was described and analyzed. Compared with the low permeance of PA/PDA/HPAN OSN membrane, PA/PANI/HPAN OSN membrane displayed quite high ethanol permeance (3.1 L∙m−2 h−1 bar-1) and acetone permeance (12.4 L∙m−2 h−1 bar-1), owing to its thinner and rougher PA selective layer. Furthermore, PA/TpTD/HPAN OSN membranes had superior separation performance with 99.0% of rejections to dyes having molecular weights above 350.4 Da, and 95.0% of rejections to crude drugs and natural pigments. Moreover, PA/Interlayer/HPAN OSN composite membranes maintained excellent anti-fouling performance, long-term stability and chemical resistance under strong acidic solution. Therefore, the polymeric interlayers with different structures could manipulate the IP process and provide new insight for preparing of PA based OSN composite membranes with excellent-performance and structural-stability.
KW - High permeance
KW - Interfacial polymerization
KW - Interlayer
KW - Organic solvent nanofiltration
KW - Structural stability
UR - http://www.scopus.com/inward/record.url?scp=85123606978&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2022.120306
DO - 10.1016/j.memsci.2022.120306
M3 - Article
AN - SCOPUS:85123606978
SN - 0376-7388
VL - 647
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 120306
ER -