Development of high performance carboxylated PIM-1/P84 blend membranes for pervaporation dehydration of isopropanol and CO2/CH4 separation

Salehian, Peyman; Yong, Wai Fen; Chung, Tai‐Shung

doi:10.1016/j.memsci.2016.06.027

Cited by 52 publications

(29 citation statements)

References 43 publications

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“…In this work, we have unified the synthetic conditions at 120°C for 24 h, leading to a number average molecular weight of 25,000 Da and a polydispersity index (PDI) of 2.05 in the resultant PIM‐1 (Figure d). The hydrolyzation of PIM‐1 under strong basic conditions (Figure ) has been reported capable of enhancing the gas transport properties . Therefore, the hydrolyzed form of PIM‐1 (hPIM‐1) was prepared as a comparison for the CO 2 capture studies.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the hydrolyzed form of PIM‐1 (hPIM‐1) was prepared as a comparison for the CO 2 capture studies. Initially, the incubation of PIM‐1 in 20 wt % NaOH ethanol/H 2 O mixture solution was believed in generating completely carboxylated polymers (PIM‐1‐COOH) . However, a recent study of the hydrolyzation reaction of PIM‐1 shows that the assumed “carboxylated” PIM‐1 via a rapid 5 h hydrolysis under even strong basic conditions is actually an amide functionalized form of PIM‐1 with negligible carboxylic acid content .…”

Section: Resultsmentioning

confidence: 99%

“…The hydrolyzation of PIM‐1 was performed based on the reported procedure with mild modifications . Briefly, NaOH solution (20 wt %) was prepared by dissolving NaOH pellets (32.5 g) into ethanol/water solution (150 mL, 1:1, v/v).…”

Section: Methodsmentioning

confidence: 99%

“…However, aging, denoted by a reduction of permeability with the time elapse due to the relaxation and reconstruction of polymeric chains caused by various mechanisms, is fatal to their practical gas separation applications . Many attempts have been proven effectively to solve the aging problem by fixing the chain movements within a certain degree, such as chemical crosslinking, physical blending with other functional fillers, and so forth. Nevertheless, these attempts normally require additional synthetic operation that makes it more complex and largely enhances the rigidness of PIMs, undermining their nature of excellent solution‐processability.…”

Section: Introductionmentioning

confidence: 99%

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Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Wang

et al. 2018

AIChE Journal

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Solution-processable microporous polymers are promising materials for CO 2 capture because of their low synthetic cost and high processability. In this work, we for the first time systematically evaluate the feasibility of two microporous polymers, namely PIM-1 and its hydrolyzed form hPIM-1, as adsorbent materials for postcombustion CO 2 capture. By conducting ternary CO 2 /N 2 /H 2 O breakthrough experiments, PIM-1 demonstrates several promising features: moderate CO 2 working capacity, low water vapor uptake capacity, good moisture resistance, and easy regeneration process. In addition, we have pioneeringly studied the multiple-cycle CO 2 adsorption-desorption induced relaxation effect on soft PIM-1 polymers. Through a simple dissolution-precipitation approach, PIM-1 can restore its BET surface area, CO 2 uptake capacity, and pore-size distribution. The solution reprocessability of PIM-1 demonstrated in this study distinguishes it from other rigid adsorbents and thus offers a new insight for the future design of economically-viable and facilely regenerable adsorbents.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Wang

et al. 2018

AIChE Journal

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“…A PIM may be blended with other polymers to improve the separation performance. Salehian et al [197] prepared blend membranes of the polyimide P84 with hydrolysed PIM-1 (cPIM-1), aiming to combine the high permeability of cPIM-1 with the high selectivity of P84 in the dehydration of 2-propanol. Pervaporation experiments at 60°C on a 2-propanol/water mixture (85/15 wt%) showed that incorporation of 10 wt% cPIM-1 into a P84 membrane improved the water permeability by 87%, whilst the high selectivity observed with pure P84 was maintained.…”

Section: Polymer Blend Membranesmentioning

confidence: 99%

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

et al. 2019

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Pervaporation (PV), a membrane process in which the feed is a liquid mixture and the permeate is removed as a vapour, offers an energy-efficient alternative to conventional separation processes such as distillation, and can be applied to mixtures that are difficult to separate, such as azeotropes. Here the principles of pervaporation and its industrial applications are outlined. Two classes of material that show promise for use in PV membranes are described: Polymers of intrinsic microporosity (PIMs) and 2D materials such as graphene. The literature regarding PV utilizing the prototypical PIM (PIM-1) and it hydrophilic hydrolysed form (cPIM-1) is reviewed. Self-standing PIM-1 membranes give competitive results compared to other membranes reported in the literature for the separation of alcohols and other volatile organic compounds from aqueous solution, and for organic/organic separations such as methanol/ethylene glycol and dimethyl carbonate/methanol mixtures. Blends of cPIM-1 with conventional polymers improve the flux for dehydration of alcohols. The incorporation of fillers, such as functionalised graphene-like fillers, into PIM-1 to form mixed matrix membranes can enhance the separation performance. Thin film composite (TFC) membranes enable very high fluxes to be achieved when a suitable support with high surface porosity is utilised. When functionalised graphene-like fillers are introduced into the selective layer of a TFC membrane, the lateral size of the flakes needs to be carefully controlled. There is a wide range of PIMs and 2D materials yet to be explored for PV applications, which offer potential to create bespoke membranes for a wide variety of organic/aqueous and organic/organic separations.

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Engineered Transport in Microporous Materials and Membranes for Clean Energy Technologies

Meckler

Smith

et al. 2018

Advanced Materials

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Many forward-looking clean-energy technologies hinge on the development of scalable and efficient membrane-based separations. Ongoing investment in the basic research of microporous materials is beginning to pay dividends in membrane technology maturation. Specifically, improvements in membrane selectivity, permeability, and durability are being leveraged for more efficient carbon capture, desalination, and energy storage, and the market adoption of membranes in those areas appears to be on the horizon. Herein, an overview of the microporous materials chemistry driving advanced membrane development, the clean-energy separations employing them, and the theoretical underpinnings tying membrane performance to membrane structure across multiple length scales is provided. The interplay of pore architecture and chemistry for a given set of analytes emerges as a critical design consideration dictating mass transport outcomes. Opportunities and outstanding challenges in the field are also discussed, including high-flux 2D molecular-sieving membranes, phase-change adsorbents as performance-enhancing components in composite membranes, and the need for quantitative metrologies for understanding mass transport in heterophasic materials and in micropores with unusual chemical interactions with analytes of interest.

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Development of high performance carboxylated PIM-1/P84 blend membranes for pervaporation dehydration of isopropanol and CO2/CH4 separation

Cited by 52 publications

References 43 publications

Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

Engineered Transport in Microporous Materials and Membranes for Clean Energy Technologies

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