Mixed Matrix Membranes with Strengthened MOFs/Polymer Interfacial Interaction and Improved Membrane Performance

Lin, Rijia; Ge, Lei; Hou, Lei; Strounina, Ekaterina; Rudolph, Victor; Zhu, Zhonghua

doi:10.1021/am500081e

Cited by 173 publications

(125 citation statements)

References 46 publications

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“…Interestingly, additive interactions with chain terminal groups appear to reinforce nanocomposite films, whereas strong side group interactions seem to compromise mechanical performance; highlighting the influence of additive interactions on polymer conformation. 20,23,50,67 …”

Section: Figmentioning

confidence: 99%

“…21,22 High additive loading generally causes severe embrittlement, though a few recent studies have reported stable MMM films through targeted polymer-additive interactions. 12,[23][24][25][26] Similarly, adsorption of polymer chains in super-porous additives have been used to stop age-related permselectivity loss in glassy MMM. 12,[27][28][29] To date, there is no complete model describing the complex polymer-additive interactions responsible for MMM properties and little is known about how additive incorporation affects the mechanical resilience of polymer nanocomposites with aging.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Figmentioning

confidence: 99%

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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“…These microporous materials have been proposed for H2, CH4 and CO2 capture/adsorption and often exhibit high uptake capacities 26 . Other materials, specifically addressed to gas capture and storage are based on mixed matrix membranes, combining both zeolite and polymers 27 , or MOFs and polymers 28 . Hyper-Crosslinked Polymers (HCPs) are a class of low cost porous organic networks easily prepared by Friedel-Crafts reaction.…”

Section: Introductionmentioning

confidence: 99%

Microporous Hyper-Cross-Linked Aromatic Polymers Designed for Methane and Carbon Dioxide Adsorption

et al. 2014

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A Friedel−Crafts reaction was used to obtain covalent aromatic networks with high surface area and microporosity suited for CO2 and CH4 adsorption, even at low pressures. Starting from tetraphenylmethane and formaldehyde dimethyl acetal in different concentrations, the reaction yields porous polymers which were characterized with a wealth of experimental and computational methods. Thermogravimetry, infrared spectroscopy, and solid-state NMR were used to study the material structure. The pore distributions were measured by applying nonlocal density functional theory analysis to the adsorption isotherms of N2 at 77 K and Ar at 87 K (the latter being more suited for pore widths less than 10 Å). Carbon dioxide and methane were adsorbed at 273 and 298 K to evaluate the performance of these systems in gas capture, separation, and storage. A theoretical model of the porous network was defined to describe the ordered fraction of the material, with particular attention to ultramicropores. Ar, CO2, and CH4 adsorption in this model material was simulated by Monte Carlo techniques with a purposely optimized force field

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“…An interfacial void-free MMM with high gas separation performance has been achieved [31]. The last but also important strategy is to eliminate the formation of non-selective interfacial voids via in-situ polymerisation [32][33][34]. Also, introducing a cross-linkable polymer (e.g.…”

Section: Introductionmentioning

confidence: 99%

Surface-etched halloysite nanotubes in mixed matrix membranes for efficient gas separation

Lin

Wang

et al. 2017

Separation and Purification Technology

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, Surfaceetched halloysite nanotubes in mixed matrix membranes for efficient gas separation, Separation and Purification Technology (2016), doi: http://dx.doi.org/10.1016/j.seppur. 2016.09.015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractPossessing the advantages of both polymeric membranes and the specific inorganic nanoparticles or nanotubes, mixed matrix membranes (MMMs) have captured the imagination of researchers for a possible technological breakthrough for efficient gas separation. However, it is still very challenging to achieve defect-free interface between fillers and polymer matrix. In this study, the naturally abundant and low cost halloysite nanotubes (HNTs) were applied as fillers for MMMs synthesis. To improve the filler dispersion and filler-matrix interface affinity, the raw HNTs were modified by either alkali etching or (3-Aminopropyl) triethoxysilane grafting. After surface etching, the defect holes were formed on the surfaces of etched-HNTs, resulting in the rougher HNT walls and significant increment of surface area and CO 2 adsorption capacity.

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Mixed Matrix Membranes with Strengthened MOFs/Polymer Interfacial Interaction and Improved Membrane Performance

Cited by 173 publications

References 46 publications

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

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

Microporous Hyper-Cross-Linked Aromatic Polymers Designed for Methane and Carbon Dioxide Adsorption

Surface-etched halloysite nanotubes in mixed matrix membranes for efficient gas separation

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