High separation performance thin film composite and thin film nanocomposite hollow fiber membranes via interfacial polymerization for organic solvent nanofiltration

2022 ◽  
Vol 278 ◽  
pp. 119567
Author(s):  
Jinghua Su ◽  
Xinghua Lv ◽  
Shuxuan Li ◽  
Yongxiang Jiang ◽  
Shaoxiao Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Solvent ◽  
Hollow Fiber ◽  
Interfacial Polymerization ◽  
Separation Performance ◽  
Film Composite ◽  
Thin Film Composite ◽  
Organic Solvent Nanofiltration ◽  
High Separation ◽  
Thin Film Nanocomposite

scholarly journals Surface Properties, Free Volume, and Performance for Thin-Film Composite Pervaporation Membranes Fabricated through Interfacial Polymerization Involving Different Organic Solvents

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2326 ◽  
Author(s):  
Micah Belle Marie Yap Ang ◽  
Shu-Hsien Huang ◽  
Shi-Wei Wei ◽  
Yu-Hsuan Chiao ◽  
Ruth R. Aquino ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Solvent ◽  
Free Volume ◽  
Organic Solvents ◽  
Solubility Parameter ◽  
Interfacial Polymerization ◽  
Separation Performance ◽  
Film Composite ◽  
Thin Film Composite ◽  
Polyamide Membrane

The type of organic solvents used in interfacial polymerization affects the surface property, free volume, and separation performance of the thin-film composite (TFC) polyamide membrane. In this study, TFC polyamide membrane was fabricated through interfacial polymerization between diethylenetriamine (DETA) and trimesoyl chloride (TMC). Four types of organic solvent were explored in the preparation of pervaporation membrane. These are tetralin, toluene, hexane, and isopentane. The solubility parameter distance between organic solvents and DETA follows in increasing order: tetralin (17.07 MPa1/2) < toluene (17.31 MPa1/2) < hexane (19.86 MPa1/2) < isopentane (20.43 MPa1/2). Same trend was also observed between the organic solvents and DETA. The larger the solubility parameter distance, the denser and thicker the polyamide. Consequently, field emission scanning electron microscope (FESEM) and positron annihilation spectroscopy (PAS) analysis revealed that TFCisopentane had the thickest polyamide layer. It also delivered the highest pervaporation efficiency (permeation flux = 860 ± 71 g m−2 h−1; water concentration in permeate = 99.2 ± 0.8 wt%; pervaporation separation index = 959,760) at dehydration of 90 wt% aqueous ethanol solution. Furthermore, TFCisopentane also exhibited a high separation efficiency in isopropanol and tert-butanol. Therefore, a suitable organic solvent in preparation of TFC membrane through interfacial polymerization enables high pervaporation efficiency.

Thin-film composite hollow fibre membrane for low pressure organic solvent nanofiltration

2020 ◽  
Vol 597 ◽  
pp. 117760 ◽  
Author(s):  
Keng Siang Goh ◽  
Jeng Yi Chong ◽  
Yunfeng Chen ◽  
Wangxi Fang ◽  
Tae-Hyun Bae ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Solvent ◽  
Low Pressure ◽  
Hollow Fibre ◽  
Film Composite ◽  
Hollow Fibre Membrane ◽  
Thin Film Composite ◽  
Fibre Membrane ◽  
Organic Solvent Nanofiltration

scholarly journals Preparation and characterization of PVA thin-film composite membrane for pervaporation dehydration of ethanol solution

2021 ◽  
Vol 947 (1) ◽  
pp. 012010
Author(s):  
Phuong Thanh Ngoc Thai ◽  
Xuan Minh Pham ◽  
Thuc Ba Nguyen ◽  
Thu Minh Le ◽  
Chau Bao Viet Tran ◽  
...  
Keyword(s):  
Thin Film ◽  
Polyvinyl Alcohol ◽  
Composite Membrane ◽  
Separation Performance ◽  
Permeation Flux ◽  
Ethanol Fuel ◽  
Film Composite ◽  
Thin Film Composite Membrane ◽  
Thin Film Composite ◽  
High Separation

Abstract These days, ethanol fuel has been widely consumed worldwide to replace gasoline due to its possible environmental and long-term economic advantages. In detail, the ethanol fuel (purity ≥ 99.5 wt%) has been produced by traditional separation processes such as azeotropic distillation or molecular sieve adsorption, which excessively employs energy and capital cost. The pervaporation has already been considered as an effective alternative to conventional methods because of its high separation efficiency and low power consumption. Pervaporation separation of ethanol/water solution using hydrophilic membranes has been extensively studied owing to their superior perm-selectivity. In this present work, the polyvinyl alcohol thin-film composite membrane is prepared by casting a thin crosslinked polyvinyl alcohol (PVA) film on the polyacrylonitrile (PAN) porous substrate. The effect of PVA concentration on the pervaporation performance of the fabricated membrane is studied. The physicochemical properties of the prepared membrane are characterized using FTIR, SEM images, and contact angle measurements. The separation performance in terms of permeation flux and selectivity is simultaneously evaluated through a pervaporation dehydration of ethanol/water mixture of 80/20 wt.% at 60°C. The results show that the increase in PVA concentration leads to the decline in the hydrophilicity and the growth of the thickness and swelling degree of the membrane. Therefore, the selectivity of the membrane is found to improve significantly, while the permeation flux decreased with the PVA concentration ranging from 2.5 to 15 wt.%. Based on the results, the PVA membrane prepared from the 10 wt.% concentration is likely to provide high separation performance.

PIM-1 pore-filled thin film composite membranes for tunable organic solvent nanofiltration

2020 ◽  
Vol 601 ◽  
pp. 117951 ◽  
Author(s):  
Jiaqi Li ◽  
Mengxiao Zhang ◽  
Weilin Feng ◽  
Liping Zhu ◽  
Lin Zhang
Keyword(s):  
Thin Film ◽  
Organic Solvent ◽  
Composite Membranes ◽  
Film Composite ◽  
Thin Film Composite ◽  
Organic Solvent Nanofiltration
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