Gas transport behavior of mixed-matrix membranes composed of silica nanoparticles in a polymer of intrinsic microporosity (PIM-1)

Ahn, Juhyeon; Chung, Wook–Jin; Pinnau, Ingo; Song, Jing-She; Du, Naiying; Robertson, Gilles P.; Guiver, Michael D.

doi:10.1016/j.memsci.2009.09.047

Cited by 249 publications

(199 citation statements)

References 34 publications

(45 reference statements)

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“…A different approach to improving membrane performance for gas separations is the formation of mixedmatrix membranes using fused silica nanoparticles [122] zeolites and related inorganic microporous materials [123], or metal organic frameworks (MOFs) [27]. To date such membranes have demonstrated enhanced permeability but at the expense of selectivity and suggest that poor interaction between polymer and inorganic particle produces enhanced free volume that is poorly size selective.…”

Section: Gas Separation Membranesmentioning

confidence: 99%

Polymers of Intrinsic Microporosity

McKeown

2012

ISRN Materials Science

178

134

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This paper focuses on polymers that demonstrate microporosity without possessing a network of covalent bonds-the so-called polymers of intrinsic microporosity (PIM). PIMs combine solution processability and microporosity with structural diversity and have proven utility for making membranes and sensors. After a historical account of the development of PIMs, their synthesis is described along with a comprehensive review of the PIMs that have been prepared to date. The important methods of characterising intrinsic microporosity, such as gas absorption, are outlined and structure-property relationships explained. Finally, the applications of PIMs as sensors and membranes for gas and vapour separations, organic nanofiltration, and pervaporation are described.

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Section: Gas Separation Membranesmentioning

confidence: 99%

Polymers of Intrinsic Microporosity

McKeown

2012

ISRN Materials Science

178

134

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“…The glassy polymers PTMSP, PIM-1, and Matrimid 5218 were selected for their different rates (in decreasing order) of physical aging and prior use in unsupported MMM films. 4 The diverse surface chemistries of PAF-1, 27,31 fumed silica, 32,33 UiO-66, 10,34 and Tiexchanged UiO-66 10 nanoparticles; each previously shown to enhance membrane performance, but not all to stop physical aging, were used to correlate observed mechanical properties with polymer interactions within composite films ( Figure 1). In this figure the effect of various mechanisms found to be at play are summarized -the key point being the nature of interaction between polymer chains and the additive surface.…”

Section: Introductionmentioning

confidence: 99%

Physical aging in glassy mixed matrix membranes; tuning particle interaction for mechanically robust nanocomposite films

et al. 2016

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Despite the exceptional separation performance of modern glassy mixed matrix membranes, these materials are not being utilized to improve the performance of existing membrane technologies. Nano-sized additives can greatly enhance separation performance, and have recently been used to overcome age-related performance loss of high performance MMMs. However nano-additives also compromise the structural integrity of films and little is known on how physical aging affects their mechanical properties over time. A solution for both physical aging and mechanical instability is required before these high performance materials can be utilised in industrial membrane applications. Here, we examine physical aging in mixed matrix membranes through mechanical properties and single gas permeation measurements using three glassy polymers, Matrimid® 5218, poly-1-trimethylsilyl-1-propyne (PTMSP), and a Polymer of Intrinsic Microporosity (PIM-1); and a range of nano-scale additives; Silica, PAF-1, UiO-66, and Ti5UiO-66, each previously shown to enhance gas separation performance. We find polymer-additive interactions strongly influence local physical aging and play a key role in determining the overall material properties of glassy nanocomposite films. Strong interface interactions can slow physical aging, and may not correlate to reinforced or age-stable films. Whereas traditionally 'incompatible' nanocomposites exhibit mechanical properties that can improve over time and even outperform their native polymers.Tuning polymer-additive interactions is vital to achieving the physical aging, mechanical stability, and permselectivity requirements of advanced mixed matrix membrane technologies and reducing the enormous global energy cost of separation processes.

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“…It has been selected due to its ease of preparation and handling (solution-processability), an accessible internal surface area of approximately 800 m 2 /g and hydrogen adsorption behaviour which is rapid and reversible [10]. The properties of the material have been characterised as both an adsorbent and as a membrane since PIM-1 is a highly popular choice as a mixed matrix membrane material for gas separation membranes [13][14][15]. However, little attention has been paid to its mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterisation of polymer of intrinsic microporosity PIM-1 for hydrogen storage applications

et al. 2016

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Polymers of intrinsic microporosity (PIMs) are currently attracting interest due to their unusual combination of high surface areas and capability to be processed into free-standing films. However, there has been little published work with regards to their physical and mechanical properties. In this paper, detailed characterisation of PIM-1 was performed by considering its chemical, gas adsorption and mechanical properties. The polymer was cast into films, and characterised in terms of their hydrogen adsorption at -196°C up to much higher pressures (17 MPa) than previously reported (2 MPa), demonstrating the maximum excess adsorbed capacity of the material and its uptake behaviour in higher pressure regimes. The measured tensile strength of the polymer film was 31 MPa with a Young's modulus of 1.26 GPa, whereas the average storage modulus exceeded 960 MPa. The failure strain of the material was 4.4%. It was found that the film is thermally stable at low temperatures, down to -150°C, and decomposition of the material occurs at 350°C. These results suggest that PIM-1 has sufficient elasticity to withstand the elastic deformations occurring within state-of-the-art high-pressure hydrogen storage tanks and sufficient thermal stability to be applied at the range of temperatures necessary for gas storage applications.

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Gas transport behavior of mixed-matrix membranes composed of silica nanoparticles in a polymer of intrinsic microporosity (PIM-1)

Cited by 249 publications

References 34 publications

Polymers of Intrinsic Microporosity

Polymers of Intrinsic Microporosity

Physical aging in glassy mixed matrix membranes; tuning particle interaction for mechanically robust nanocomposite films

Mechanical characterisation of polymer of intrinsic microporosity PIM-1 for hydrogen storage applications

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