In situ regulation of micro-pore to design high performance polyimide membranes for pervaporation dehydration of isopropanol

Salehian, Peyman; Chua, Mei Ling; Askari, Mohammad; Shi, Gui Min; Chung, Tai‐Shung

doi:10.1016/j.memsci.2015.07.004

Cited by 23 publications

(10 citation statements)

References 62 publications

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“…The fillers in the surface section were indistinct because the polymer chain on COF p has attractive interactions with the polymer matrix, and COF p prefers to be covered by a polymer matrix rather than appearing on the membrane surface. The pore structure was verified by bulk PALS analyses − for the PVAm films and COF p -PVAm films (Table ). During the positron annihilation, the pick-off lifetime (τ i ) of the ortho-positroniums can be converted into pore radius, and the fractional free volume (FFV) can also be calculated.…”

Section: Resultsmentioning

confidence: 99%

Penetrated COF Channels: Amino Environment and Suitable Size for CO₂ Preferential Adsorption and Transport in Mixed Matrix Membranes

Cao

Wang

Qiao

et al. 2019

ACS Appl. Mater. Interfaces

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Developing mixed matrix membranes (MMMs) is challenging because the interface between different matrices often forms undesirable structures. Herein, we demonstrate a method of creating suitable CO2-selective channels based on interface regulation that greatly enhances membrane separation performance. The poly(vinylamine), which also acts as a polymer matrix, was immobilized onto covalent organic frameworks (COFs) to obtain polymer–COF hybrid materials (COFp). The COFp and polymer matrix are highly compatible because they have the same segment. The polymer matrix was induced to penetrate the oversized COFp, resulting in an amino-environmental pore wall and appropriately sized CO2-selective channels dispersed in MMMs. The MMMs exhibited satisfactory membrane performance for CO2/N2, CO2/CH4, and CO2/H2 separation. A CO2 transport model for preferential adsorption and transport is clearly presented for the first time. The membrane separation mechanism is also discussed. This work demonstrates potential applications for material, interface, and membrane investigations.

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Section: Resultsmentioning

confidence: 99%

Penetrated COF Channels: Amino Environment and Suitable Size for CO₂ Preferential Adsorption and Transport in Mixed Matrix Membranes

Cao

Wang

Qiao

et al. 2019

ACS Appl. Mater. Interfaces

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“…Over the past decades, a plethora of nanostructured materials including carbon nanoparticles [27,29,30,34,42,[45][46][47][48][49][50][51][52][53][54][55][56], zeolites [5,7,10,12,[57][58][59][60][61], metal-organic frameworks (MOFs) [62][63][64][65][66][67][68][69][70], metal oxides [3,4,7,22,26,28,36,41,45,, titanosilicate [21], nano-clay [32,[93][94][95][96], nano-sized polyaniline (PANI) particles [97,...…”

Section: Nanocomposite Membranes Used In the Pv Processmentioning

confidence: 99%

“…It is important to realize that separation of liquid mixtures by PV is based on membrane affinity to the minor component in terms of its hydrophilic, hydrophobic, or organophilic nature [12,20]. Moreover, it should be noted that the membrane is the key element to achieve success in the PV process since its material determines separation performance [3,5,16,[21][22][23]. Generally, an ideal PV membrane should possess a thin top layer skin (without any defects) and excellent sorption capacity for the desired solute, low swelling to maintain selectivity and structural stability, good mechanical strength, chemical, and thermal stability, high permeability without compromising selectivity, and economic viability [6,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanofillers on Properties and Pervaporation Performance of Nanocomposite Membranes: A Review

et al. 2022

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In recent years, a well-known membrane-based process called pervaporation (PV), has attracted remarkable attention due to its advantages for selective separation of a wide variety of liquid mixtures. However, some restrictions of polymeric membranes have led to research studies on developing membranes for efficient separation in the PV process. Recent studies have focused on preparation of nanocomposite membranes as an effective method to improve both selectivity and permeability of polymeric membranes. The present study provides a review of PV nanocomposite membranes for various applications. In this review, recent developments in the field of nanocomposite membranes, including the fabrication methods, characterization, and PV performance, are summarized.

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“…It can be highlighted that the Torlon/DES composite showed a comparable flux and good selectivity for removing water from IPA at relatively low temperatures. Among all, polyimides with various additives possess superior pervaporation properties [45][46][47][48]. The inclusion of DES in the Torlon matrix results in an increased performance compared with the Torlon film.…”

Section: Comparison With Literature Datamentioning

confidence: 99%

Development of Novel Polyamide-Imide/DES Composites and Their Application for Pervaporation and Gas Separation

et al. 2021

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Novel polymer composites based on polyamide–imide Torlon and deep eutectic solvent (DES) were fabricated and adapted for separation processes. DES composed of zinc chloride and acetamide in a ratio of 1:3 M was first chosen as a Torlon-modifier due to the possibility of creating composites with a uniform filling of the DES through the formation of hydrogen bonds. The structure of the membranes was investigated by scanning electron microscopy and X-ray diffraction analysis; thermal stability was determined by thermogravimetric analysis and mass spectrometry. The surface of the composites was studied by determining the contact angles and calculating the surface tension. The transport properties were investigated by such membrane methods as pervaporation and gas separation. It was found that the inclusion of DES in the polymer matrix leads to a significant change in the structure and surface character of composites. It was also shown that DES plays the role of a plasticizer and increases the separation performance in the separation of liquids and gases. Torlon/DES composites with a small amount of modifier were effective in alcohol dehydration, and were permeable predominantly to water impurities in isopropanol. Torlon/DES-5 demonstrates high selectivity in the gas separation of O2/N2 mixture.

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In situ regulation of micro-pore to design high performance polyimide membranes for pervaporation dehydration of isopropanol

Cited by 23 publications

References 62 publications

Penetrated COF Channels: Amino Environment and Suitable Size for CO₂ Preferential Adsorption and Transport in Mixed Matrix Membranes

Penetrated COF Channels: Amino Environment and Suitable Size for CO₂ Preferential Adsorption and Transport in Mixed Matrix Membranes

Effect of Nanofillers on Properties and Pervaporation Performance of Nanocomposite Membranes: A Review

Development of Novel Polyamide-Imide/DES Composites and Their Application for Pervaporation and Gas Separation

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In situ regulation of micro-pore to design high performance polyimide membranes for pervaporation dehydration of isopropanol

Cited by 23 publications

References 62 publications

Penetrated COF Channels: Amino Environment and Suitable Size for CO2 Preferential Adsorption and Transport in Mixed Matrix Membranes

Penetrated COF Channels: Amino Environment and Suitable Size for CO2 Preferential Adsorption and Transport in Mixed Matrix Membranes

Effect of Nanofillers on Properties and Pervaporation Performance of Nanocomposite Membranes: A Review

Development of Novel Polyamide-Imide/DES Composites and Their Application for Pervaporation and Gas Separation

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Product

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Penetrated COF Channels: Amino Environment and Suitable Size for CO₂ Preferential Adsorption and Transport in Mixed Matrix Membranes

Penetrated COF Channels: Amino Environment and Suitable Size for CO₂ Preferential Adsorption and Transport in Mixed Matrix Membranes