Shaping of metal-organic frameworks into mechanically stable monoliths with poly(vinyl alcohol) by phase separation technique

Hastürk, Emrah; Schlüsener, Carsten; Quodbach, Julian; Schmitz, Anton; Janiak, Christoph

doi:10.1016/j.micromeso.2019.02.011

Cited by 29 publications

(37 citation statements)

References 55 publications

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“…The addition of binders was then considered, initially adding 5 wt % of either polyvinylalcohol (PVA), polyvinylbutyral (PVB) or sucrose, whose structures are shown in Figure 3, compressing at 438 MPa for 15 min. The choice of these binders was based on recent literature reports where they were employed to produce pellets of MOFs [21][22][23]. Before characterisation, the pellets containing binders were treated at 120 • C for 2 h. This treatment was applied under the assumption that in a real gas separation/storage application, the pellets would need to be activated at high temperature to make their porosity accessible.…”

Section: Resultsmentioning

confidence: 99%

An Optimised Compaction Process for Zr-Fumarate (MOF-801)

et al. 2019

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We reported a systematic approach aimed at identifying the optimal conditions for compaction of MOF-801, a small-pore zirconium-based metal–organic framework (MOF) containing fumaric acid as the linker, that can be easily synthesised in aqueous medium. Pellets of the MOF were prepared by compressing the powder either in neat form or dry-mixed with binders (sucrose, polyvinylalcohol, polyvinylbutyral) under a range of pressures and for different times. The mechanical stability and durability of the pellets was tested by simple drop tests and shake tests, finding that addition of 5% of polyvinylbutyral was enough to produce highly resilient pellets that did not release significant amounts of powder upon cracking. The crystallinity, textural properties and CO2 adsorption performance of the MOF were successively assessed, observing the least change of the original properties in pellets compressed at 146 MPa for 15 s. Compaction at higher pressures impacted the performance more heavily, with no evident benefit from the mechanical point of view, whereas compression time did not have a relevant effect. The cyclic adsorption behaviour was tested, showing that the pellets retained as much as 90% of the CO2 working capacity, while displaying unaffected sorption kinetics, and 74% of the H2O working capacity.

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Section: Resultsmentioning

confidence: 99%

An Optimised Compaction Process for Zr-Fumarate (MOF-801)

et al. 2019

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“…While phase separation is mostly applied to prepare MOF-based composite beads, monoliths can also be obtained using similar approaches. In particular, Hasturk et al [154] shaped Al-fumarate and the Cr-based MIL-100 into mechanically stable monoliths. For this, they first dissolved some PVA in water, prior to the addition of the MOF powder.…”

Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

From metal–organic framework powders to shaped solids: recent developments and challenges

et al. 2021

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“…This strategy can also be applied to fabricate other monolithic MOFs (e.g., MIL-101(Cr)) with low cost, good recovery percentage, and high reusability [90]. Hastürk et al [91] reported a novel shaping strategy, i.e., phase separation technique with PVA, to construct Alfum@PVA (Alfum = aluminum fumarate) and MIL-101(Cr) monoliths. The pore volume of Alfum@PVA was greater than that expected on the basis of MOF loading, which can be attributed to the additional mesopores formed at the MOF-polymer interface, resulting in an increase in water uptake when compared with that in pure MOFs.…”

Section: Aluminum-based Monolithic Mofsmentioning

confidence: 99%

Recent advances in the synthesis of monolithic metal-organic frameworks

Duan

et al. 2021

Sci. China Mater.

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Although considerable achievements have been realized in recent years with respect to the syntheses of metalorganic frameworks (MOFs), majority of the developed MOFs are in the form of polydisperse microcrystalline powders, which cause dustiness, abrasion, and clogging and decrease pressure when used in industrial applications. Monolithic MOFs overcome these drawbacks and exhibit various promising characteristics. In this review, we present the recent advances associated with monolithic MOFs based on metal centers and a brief outline of the most prominent examples. Furthermore, the challenges and prospects associated with monolithic MOFs in terms of large-scale production and engineering applicability are analyzed based on our knowledge to conclude this review.

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Shaping of metal-organic frameworks into mechanically stable monoliths with poly(vinyl alcohol) by phase separation technique

Cited by 29 publications

References 55 publications

An Optimised Compaction Process for Zr-Fumarate (MOF-801)

An Optimised Compaction Process for Zr-Fumarate (MOF-801)

From metal–organic framework powders to shaped solids: recent developments and challenges

Recent advances in the synthesis of monolithic metal-organic frameworks

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