Shaping of MOFs via freeze-casting method with hydrophilic polymers and their effect on textural properties

Hastürk, Emrah; Höfert, Simon-Patrick; Topalli, Burhan; Schlüsener, Carsten; Janiak, Christoph

doi:10.1016/j.micromeso.2019.109907

Cited by 26 publications

(25 citation statements)

References 64 publications

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“…However, freeze-drying is advantageous because ice-templated macroporous monoliths can be obtained after the removal of ice crystals generated during the freezing process; this approach was successfully applied to shape the HKUST-1 monolith [48,92]. Based on this principle, a research group adopted freeze-drying (also known as the freeze-casting method) coupled with the phase separation technology for polymers to prepare Alfum, MIL-160(Al), and MIL-101(Cr) monolithic composites [93]. Six hydrophilic polymer binders, including polyacrylic acid (PAA), sodium polyacrylate (PAANa), polyethylene glycol (PEG), polyethylene imine (PEI), PVA with two different hydrolysis degrees, 88 and 98, and polyvinyl pyrrolidone (PVP), were used.…”

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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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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“…Hastürk et al, through freeze-casting, successfully developed hydrothermal stable Alfum, MIL-160(Al), and MIL-101(Cr) monoliths using various polymer binders. From those, the monoliths with the PVA binder showed the highest mechanical stability; PEI exhibited the least, given that it is a liquid at room temperature, whereas sodium polyacrylate (PAANa) was the most hydrophilic, according to its water vapor uptake in contrast to polyethylene glycol (PEG) [61].…”

Section: Processes With Organic Bindersmentioning

confidence: 99%

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

et al. 2022

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Metal–organic frameworks (MOFs) could be utilized for a wide range of applications such as sorption, catalysis, chromatography, energy storage, sensors, drug delivery, and nonlinear optics. However, to date, there are very few examples of MOFs exploited on a commercial scale. Nevertheless, progress in MOF-related research is currently paving the way to new industrial opportunities, fostering applications and processes interconnecting fundamental chemistry with engineering and relevant sectors. Yet, the fabrication of porous MOF materials within resistant structures is a key challenge impeding their wide commercial use for processes such as adsorptive separation. In fact, the integration of nano-scale MOF crystallic structures into bulk components that can maintain the desired characteristics, i.e., size, shape, and mechanical stability, is a prerequisite for their wide practical use in many applications. At the same time, it requires sophisticated shaping techniques that can structure nano/micro-crystalline fine powders of MOFs into diverse types of macroscopic bodies such as monoliths. Under this framework, this review aims to bridge the gap between research advances and industrial necessities for fostering MOF applications into real life. Therefore, it critically explores recent advances in the shaping and production of MOF macro structures with regard to the binding materials that have received little attention to date, but have the potential to give new perspectives in the industrial applicability of MOFs. Moreover, it proposes future paths that can be adopted from both academy and industry and can further boost MOF exploitation.

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“…The pellets withstood mechanical loads of up to 79 N. The Al-fumarate/PVA pellets were placed between the lamellae of a pipe-lamella heat exchanger, Dynamic adsorption and cooling performance testing provided specific cooling powers (SCP) from 349 up to 431 W/kg(adsorbent), which is better than current commercially used silica gel grains in AHPs under comparable operating conditions. [31] Another promising shaping method for MOF/polymer monoliths was presented by Hastürk et al [119,120] based on Sun′s method of phase separation (Figure 13). [121] The Al-fum/PVA composites with a MOF loading of 50 to 80 wt.-% even exhib- Figure 13.…”

Section: Shapingmentioning

confidence: 99%

“…Another promising shaping method for MOF/polymer monoliths was presented by Hastürk et al [ 119,120 ] based on Sun's method of phase separation (Figure 13). [ 121 ] The Al‐fum/PVA composites with a MOF loading of 50 to 80 wt.‐% even exhibited an increased porosity.…”

Section: Shapingmentioning

confidence: 99%

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Metal‐Organic Frameworks as Sorption Materials for Heat Transformation Processes

et al. 2020

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Cyclic physical adsorption and desorption processes on porous materials can be used for the conversion of heat in heat transformation processes, which is the working principle in adsorption heat pumps (AHPs). Environmentally benign water with its high enthalpy of evaporation is the working fluid of choice in AHPs. Metal‐organic frameworks, MOFs can adsorb large amounts of water or methanol, up to their own weight. MOFs could be alternative materials to silica gels, zeolites, or aluminum phosphates for low‐temperature heat transformations in AHPs.

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Shaping of MOFs via freeze-casting method with hydrophilic polymers and their effect on textural properties

Cited by 26 publications

References 64 publications

Recent advances in the synthesis of monolithic metal-organic frameworks

Recent advances in the synthesis of monolithic metal-organic frameworks

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

Metal‐Organic Frameworks as Sorption Materials for Heat Transformation Processes

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