Microstructural characterization and evaluation of pervaporation performance of thin-film composite membranes fabricated through interfacial polymerization on hydrolyzed polyacrylonitrile substrate

An, Quan‐Fu; Ang, Micah Belle Marie Yap; Huang, Yun-Hsuan; Huang, Shu-Hsien; Chiao, Yu‐Hsuan; Lai, Cheng-Lee; Tsai, Hui-An; Hung, Wei‐Song; Hu, Chien‐Chieh; Wu, Ying; Lee, Kueir‐Rarn

doi:10.1016/j.memsci.2019.04.050

Cited by 40 publications

(19 citation statements)

References 55 publications

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“…Compared with TFC‐control membrane, all SIP‐modified TFC membranes exhibit smoother surfaces, probably because of the newly formed ultrathin and non‐uniform PA layer by SIP reaction between CDs and TMC, which flattens the rough structure on the previously formed PA layer (Figure S7). In addition, TFC‐ β ‐CD membrane has the smoothest surface among all SIP‐modified TFC membranes, since β ‐CD with the smaller molecular size than all amine‐CDs has the fastest immigration rate, promoting the polymer chain mobility and the chain packing efficiently during SIP reaction 23 . Moreover, after IP, the porous support layer is covered by the additional thin dense layer, confirming the successful formation of the selective layer All SIP‐modified TFC membranes exhibit the thicker selective layers than that of TFC‐control membrane because of the formed additional polyester or polyamide networks by SIP.…”

Section: Resultsmentioning

confidence: 99%

“…Various explorations have been made to address these issues of TFC membranes, such as employing suitable amine and acyl chloride monomers, 5,10,23,24 incorporating hydrophilic additives or co‐solvent in the aqueous or organic phase, 25‐28 as well as optimizing the substrate morphology or surface properties before the IP process 29‐31 . Compared to above methods, second interfacial polymerization (SIP) is considered to be the ideal strategy to obtain the dense and hydrophilic selective layer, because it can easily regulate crosslinking degree and hydrophilicity of selective layer simultaneously using multifunctional group materials with strong hydrophilicity 32 .…”

Section: Introductionmentioning

confidence: 99%

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Second interfacial polymerization of thin‐film composite hollow fibers with amine‐cyclodextrins for pervaporation dehydration

Zhu

et al. 2021

AIChE Journal

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High performance thin‐film composite (TFC) hollow fiber membranes have been developed for pervaporation dehydration by second interfacial polymerization (SIP) modification with three kinds of amine‐functionalized β‐cyclodextrin (amine‐CDs), which were synthesized by modifying β‐CD with ammonia, ethylenediamine (EDA), and tris(2‐aminoethyl)amine, respectively. The chemical properties of amine‐CDs and SIP‐modified TFC membranes were characterized by various techniques. The effects of amine‐CD type and SIP parameters (pH or concentration of CD‐EDA solution) were studied systematically to acquire the optimized selective layer of TFC membranes for ethanol dehydration. Among all SIP‐modified TFC membranes, the one with SIP by 2 wt% CD‐EDA aqueous solution (pH = 2) exhibited the most outstanding separation performance with a ultrahigh permeation flux (3,018.0 ± 12.0 g/m2 hr) and permeate concentration (98.7 ± 0.2 wt% water) at 50°C (equivalent to separation factor of 415), contributed by the effectively incorporated CD with rich hydrophilic functional groups and intrinsic nanocavities facilitating the passage of water molecules.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Second interfacial polymerization of thin‐film composite hollow fibers with amine‐cyclodextrins for pervaporation dehydration

Zhu

et al. 2021

AIChE Journal

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“…The porous PAN-nonwoven substrate (200 mm) was treated with a 1.0 M NaOH (aq) (60 1C, 0.5 h) for oxidation of the PAN layer surface, 36 washed with water, and dried at 50 1C under a vacuum overnight. To ensure the surface hydrophilicity of the alkali-treated PAN layer of the substrate, the substrate was stored in water prior to use.…”

Section: Preparation Of Lignin-based Tfc Membranesmentioning

confidence: 99%

Employing lignin in the formation of the selective layer of thin-film composite membranes for pervaporation desalination

Chen

Sun

et al. 2021

Mater. Adv.

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“…TFC membranes manufactured through the method of interfacial polymerization have been widely used in the fields of reverse osmosis [3,4] and nanofiltration [5][6][7] separation processes, but are rarely applied to pervaporation. Interfacial polymerization produces a variety of polymer layers, including those of polyamide [8][9][10][11][12], polyester [8,9,[13][14][15][16][17], and polyurea [18]. In 1977, Rozelle et al [19] used polyethyleneimine (PEI) and toluene diisocyanate (TDI) for interfacial polymerization to prepare NS-100 composite polyurea membrane.…”

Section: Introductionmentioning

confidence: 99%

Cosolvent-Driven Interfacial Polymerization for Superior Separation Performance of Polyurea-Based Pervaporation Membrane

et al. 2021

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A thin-film composite (TFC) polyurea membrane was fabricated for the dehydration of an aqueous tetrahydrofuran (THF) solution through interfacial polymerization, wherein polyethyleneimine (a water-soluble amine monomer) and m-xylene diisocyanate (an oil-soluble diisocyanate monomer) were reacted on the surface of a modified polyacrylonitrile (mPAN) substrate. Cosolvents were used to tailor the membrane properties and increase the membrane permeation flux. Four types of alcohols that differed in the number of carbon (methanol, ethanol, isopropanol, and tert-butanol) were added as cosolvents, serving as swelling agents, to the aqueous-phase monomer solution, and their effect on the membrane properties and pervaporation separation was discussed. Attenuated total reflection Fourier transform infrared spectroscopy confirmed the formation of a polyurea layer on mPAN. Field emission scanning electron microscopy and surface water contact angle analysis indicated no change in the membrane morphology and hydrophilicity, respectively, despite the addition of cosolvents for interfacial polymerization. The TFC membrane produced when ethanol was the cosolvent exhibited the highest separation performance (permeation flux = 1006 ± 103 g·m−2·h−1; water concentration in permeate = 98.8 ± 0.3 wt.%) for an aqueous feed solution containing 90 wt.% THF at 25 °C. During the membrane formation, ethanol caused the polyurea layer to loosen and to acquire a certain degree of cross-linking. The optimal fabrication conditions were as follows: 10 wt.% ethanol as cosolvent; membrane curing temperature = 50 °C; membrane curing time = 30 min.

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Microstructural characterization and evaluation of pervaporation performance of thin-film composite membranes fabricated through interfacial polymerization on hydrolyzed polyacrylonitrile substrate

Cited by 40 publications

References 55 publications

Second interfacial polymerization of thin‐film composite hollow fibers with amine‐cyclodextrins for pervaporation dehydration

Second interfacial polymerization of thin‐film composite hollow fibers with amine‐cyclodextrins for pervaporation dehydration

Employing lignin in the formation of the selective layer of thin-film composite membranes for pervaporation desalination

Cosolvent-Driven Interfacial Polymerization for Superior Separation Performance of Polyurea-Based Pervaporation Membrane

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