High-performance polyamide composite membranes via double-interfacial polymerizations on a nanofibrous substrate for pervaporation dehydration

Li, Peiyun; Shen, Ke; Zhang, Tonghui; Ding, Siping; Wang, Xuefen

doi:10.1016/j.seppur.2020.117927

Cited by 26 publications

(12 citation statements)

References 36 publications

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“…After exceeding the optimum loading of filler, the separation factor and flux were found to gradually decrease. A similar tendency in the behaviour of flux and separation factor was observed by Li et al [40] in the study on isopropanol-water mixture PV separation with polyamide (PA) composite membranes prepared in a double interfacial polymerization of PA on a nanofibrous electrospun polyacrylonitrile fibre substrate. It was noticed that the excess concentration of trimesoyl chloride monomer in organic phase caused the formation of too-thick selective layer, leading to a decline in the molecular sieving efficiency and membrane stability and, consequently, a decrease in the separation factor and total flux.…”

Section: Pervaporation Performancesupporting

confidence: 81%

Mixed Manganese Dioxide on Magnetite Core MnO2@Fe3O4 as a Filler in a High-Performance Magnetic Alginate Membrane

2021

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The process of ethanol dehydration via pervaporation was performed using alginate membranes filled with manganese dioxide and a mixed filler consisting of manganese dioxide on magnetite core MnO2@Fe3O4 particles. The crystallization of manganese dioxide on magnetite nanoparticle surface resulted in a better dispersibility of this mixed filler in polymer matrix, with the preservation of the magnetic properties of magnetite. The prepared membranes were characterized by contact angle, degree of swelling and SEM microscopy measurements and correlated with their effectiveness in the pervaporative dehydration of ethanol. The results show a strong relation between filler properties and separation efficiency. The membranes filled with the mixed filler outperformed the membranes containing only neat oxide, exhibiting both higher flux and separation factor. The performance changed depending on filler content; thus, the presence of optimum filler loading was observed for the studied membranes. The best results were obtained for the alginate membrane filled with 7 wt.% of mixed filler MnO2@Fe3O4 particles. For this membrane, the separation factor and flux equalled to 483 and 1.22 kg·m−2·h−1, respectively.

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Section: Pervaporation Performancesupporting

confidence: 81%

Mixed Manganese Dioxide on Magnetite Core MnO2@Fe3O4 as a Filler in a High-Performance Magnetic Alginate Membrane

2021

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“…Increasing the temperature enhances the driving force, the effect of which is to hasten the motion of the molecules, resulting in an increased driving force of satu-ration vapor pressure on the upstream side. Thus, the permeation flux increases [34]. In addition, at a high temperature, the free volume in the membrane is enlarged, allowing more molecules to pass through easily.…”

Section: Operating Conditionsmentioning

confidence: 99%

Enhancing Performance of Thin-Film Nanocomposite Membranes by Embedding in Situ Silica Nanoparticles

et al. 2022

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In this work, silica nanoparticles were produced in situ, to be embedded eventually in the polyamide layer formed during interfacial polymerization for fabricating thin-film nanocomposite membranes with enhanced performance for dehydrating isopropanol solution. The nanoparticles were synthesized through a sol-gel reaction between 3-aminopropyltrimethoxysilane (APTMOS) and 1,3-cyclohexanediamine (CHDA). Two monomers—CHDA (with APTMOS) and trimesoyl chloride—were reacted on a hydrolyzed polyacrylonitrile (hPAN) support. To obtain optimum fabricating conditions, the ratio of APTMOS to CHDA and reaction time were varied. Field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) were used to illustrate the change in morphology as a result of embedding silica nanoparticles. The optimal conditions for preparing the nanocomposite membrane turned out to be 0.15 (g/g) APTMOS/CHDA and 60 min mixing of APTMOS and CHDA, leading to the following membrane performance: flux = 1071 ± 79 g∙m−2∙h−1, water concentration in permeate = 97.34 ± 0.61%, and separation factor = 85.39. A stable performance was shown by the membrane under different operating conditions, where the water concentration in permeate was more than 90 wt%. Therefore, the embedment of silica nanoparticles generated in situ enhanced the separation efficiency of the membrane.

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“…According to the preparation method showed by our previous works, 25,26,28 we fabricated the nanofibrous substrates as follow described. First, the certain amount of PAN powder was added into DMF, then stirred at 50 C overnight, the homogeneous 8 wt% PAN/DMF solution was prepared.…”

Section: Preparation Of Electrospun Pan Nanofibrous Substratesmentioning

confidence: 99%

“…In this work, polyacrylonitrile (PAN) nanofibrous mats were selected as the substrates of composite membranes because electrospun nanofibrous mat had high porosity and interconnected pore structure, which could dramatically decrease the mass transfer resistance of water molecules and endow resultant nanofibrous composite PV membranes with high permeability. [25][26][27] For fabricating high-performance aciduric PSA selective layer on porous nanofibrous substrates, suitable small molecular aliphatic diamine monomer was selected to react with 1, 3-benzenedisulfonyl chloride (BDSC) as illustrated in Scheme 1. The film-forming ability and crosslinking degree of three candidate diamine with BDSC was investigated.…”

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confidence: 99%

Development of high‐flux aciduric ultra‐thin nanofibrous pervaporation composite membrane for acetic acid dehydration

Zhang

Ding

et al. 2022

J of Applied Polymer Sci

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Acetic acid is an essential intermediate chemical in industry. Traditional inorganic membrane cannot meet the demand of high-efficient dehydration and polymeric membrane is restricted by its low organic solution resistance. In this work, a novel aciduric pervaporation composite membrane was successfully generated by fabricating an ultrathin polysulfonamide (PSA) layer on the polyacrylonitrile (PAN) nanofibrous substrate via interfacial polymerization (IP) method. Through the optimization of fabrication process including selecting the suitable structure of diamine (taking three types aliphatic amines as candidates), optimizing the concentration of two phase solutions, the resultant thin-film nanofibrous composite (TFNC) membrane was fabricated by using aliphatic amine triethylenetetramine (TETA: 3.0 wt%) and 1, 3-benzenedisulfonyl chloride (BDSC: 1.0 wt%) as IP monomers and the network structure with suitable sieving size was constructed. The ultrathin aciduric PSA selective layer (thickness: 104 ± 15 nm) endowed the TFNC membrane with excellent separation efficiency. For dehydrating 70 wt% acetic acid aqueous solution at 60 C, PSA-3.0-1.0/PAN TFNC membrane exhibited competitive separation efficiency and great acid stability. It possessed extremely high permeate flux (15,321 g/m 2 h) with stable separation factor (109). For long-term acid dehydration evaluation, PSA/PAN membrane showed great stability during 7 days pervaporation. This work took advantage of traditional IP method for designing a novel pervaporation membrane with aciduric chemical structure, suggested an effective and facile approach to develop novel pervaporation membranes for harsh environment separation.

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High-performance polyamide composite membranes via double-interfacial polymerizations on a nanofibrous substrate for pervaporation dehydration

Cited by 26 publications

References 36 publications

Mixed Manganese Dioxide on Magnetite Core MnO2@Fe3O4 as a Filler in a High-Performance Magnetic Alginate Membrane

Mixed Manganese Dioxide on Magnetite Core MnO2@Fe3O4 as a Filler in a High-Performance Magnetic Alginate Membrane

Enhancing Performance of Thin-Film Nanocomposite Membranes by Embedding in Situ Silica Nanoparticles

Development of high‐flux aciduric ultra‐thin nanofibrous pervaporation composite membrane for acetic acid dehydration

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