Linking defects, hierarchical porosity generation and desalination performance in metal–organic frameworks

Liang, Weibin; Li, Lin; Hou, Jingwei; Shepherd, Nicholas D.; Bennett, Thomas D.; D’Alessandro, Deanna M.; Chen, Vicki

doi:10.1039/c7sc05175a

Cited by 73 publications

(63 citation statements)

References 52 publications

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“…Over the past two decades, bioengineering strategies investigate for suitable biomaterials to develop safe patient-specific regeneration therapies. In line with our previous studies on MOF-modified substrates, 77,82,101,102,110,115 we proposed these nanostructures as tunable cell culture platforms with considerable potential to simultaneously regulating different microenvironmental cues.…”

Section: Discussionsupporting

confidence: 76%

<p>ZIF-8 Modified Polypropylene Membrane: A Biomimetic Cell Culture Platform with a View to the Improvement of Guided Bone Regeneration</p>

Ejeian¹,

Razmjou²,

Nasr-Esfahani³

et al. 2020

IJN

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Purpose Despite the significant advances in modeling of biomechanical aspects of cell microenvironment, it remains a major challenge to precisely mimic the physiological condition of the particular cell niche. Here, the metal–organic frameworks (MOFs) have been introduced as a feasible platform for multifactorial control of cell-substrate interaction, given the wide range of physical and mechanical properties of MOF materials and their structural flexibility. Results In situ crystallization of zeolitic imidazolate framework-8 (ZIF-8) on the polydopamine (PDA)-modified membrane significantly raised surface energy, wettability, roughness, and stiffness of the substrate. This modulation led to an almost twofold increment in the primary attachment of dental pulp stem cells (DPSCs) compare to conventional plastic culture dishes. The findings indicate that polypropylene (PP) membrane modified by PDA/ZIF-8 coating effectively supports the growth and proliferation of DPSCs at a substantial rate. Further analysis also displayed the exaggerated multilineage differentiation of DPSCs with amplified level of autocrine cell fate determination signals, like BSP1, BMP2, PPARG, FABP4, ACAN , and COL2A . Notably, osteogenic markers were dramatically overexpressed (more than 100-folds rather than tissue culture plate) in response to biomechanical characteristics of the ZIF-8 layer. Conclusion Hence, surface modification of cell culture platforms with MOF nanostructures proposed as a powerful nanomedical approach for selectively guiding stem cells for tissue regeneration. In particular, PP/PDA/ZIF-8 membrane presented ideal characteristics for using as a barrier membrane for guided bone regeneration (GBR) in periodontal tissue engineering.

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Section: Discussionsupporting

confidence: 76%

<p>ZIF-8 Modified Polypropylene Membrane: A Biomimetic Cell Culture Platform with a View to the Improvement of Guided Bone Regeneration</p>

Ejeian¹,

Razmjou²,

Nasr-Esfahani³

et al. 2020

IJN

Self Cite

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“…metal oxide nanoparticles, 9-13 silica nanoparticles, [14][15][16][17][18][19] zeolites, [20][21][22][23] graphene oxides, [24][25][26] carbon nanotubes (CNTs) [27][28][29] and metalorganic frameworks (MOFs). [30][31][32][33] Nevertheless, the most popular inorganic additives are metal oxide nanoparticles. The broad spectrum of metal oxide nanoparticles that can be introduced into the polymer membrane contains Fe 3 O 4 , ZrO 2 TiO 2 , MgO, CaO, Al 2 O 3 ,CuO, SiO 2 and ZnO.…”

Section: Introductionmentioning

confidence: 99%

New type of alginate/chitosan microparticle membranes for highly efficient pervaporative dehydration of ethanol

Dudek

Turczyn

2018

RSC Adv.

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“…Among all the PVA films studied here, P(AA-AMPS) crosslinked PVA showed the highest mechanical strength. The deposition of this composite as a selective layer on nanofibrous PAN supports via spray coating yielded TFC membranes with desalination performances that outperformed current PV desalination 6,16 (by a factor of 3-20-fold), state-of-the-art vacuum 3 , and direct contact MD membranes 17 .…”

mentioning

confidence: 98%

“…D esalination is a mature technology for addressing freshwater scarcity by removing salt (sodium chloride (NaCl)) from seawater. Common polymer membrane technologies deployed in desalination include seawater reverse osmosis (SWRO) 1,2 , membrane distillation (MD) 3 , and pervaporation (PV) [4][5][6][7] . SWRO is the preferred technology due to low energy cost for producing one cubic meter of clean water (2-4 kw h m −3 ) when compared to thermally driven processes such as MD, multistage flashing, or multi-effect distillation where energy costs are twice as for SWRO (3)(4)(5).5 kw h m −3 ) for creating a phase change in water to drive separations 2,8 .…”

mentioning

confidence: 99%

Tailoring the molecular structure of crosslinked polymers for pervaporation desalination

et al. 2020

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Polymer crosslinking imbues chemical stability to thin films at the expense of lower molecular transportation rates. Here in this work we deployed molecular dynamics simulations to optimise the selection of crosslinking compounds that overcome this trade-off relationship. We validated these simulations using a series of experiments and exploited this finding to underpin the development of a pervaporation (PV) desalination thin-film composite membrane with water fluxes reaching 234.9 ± 8.1 kg m −2 h −1 and salt rejection of 99.7 ± 0.2 %, outperforming existing membranes for pervaporation and membrane distillation. Key to achieving this state-of-the-art desalination performance is the spray coating of 0.73 μm thick crosslinked dense, hydrophilic polymers on to electrospun nanofiber mats. The desalination performances of our polymer nanocomposites are harnessed here in this work to produce freshwater from brackish water, seawater and brine solutions, addressing the key environmental issue of freshwater scarcity.

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Linking defects, hierarchical porosity generation and desalination performance in metal–organic frameworks

Abstract: The composite membranes with defective metal–organic frameworks (MOFs) show a significant increase in water flux, without compromising the high salt rejection.

Cited by 73 publications

References 52 publications

<p>ZIF-8 Modified Polypropylene Membrane: A Biomimetic Cell Culture Platform with a View to the Improvement of Guided Bone Regeneration</p>

<p>ZIF-8 Modified Polypropylene Membrane: A Biomimetic Cell Culture Platform with a View to the Improvement of Guided Bone Regeneration</p>

New type of alginate/chitosan microparticle membranes for highly efficient pervaporative dehydration of ethanol

Tailoring the molecular structure of crosslinked polymers for pervaporation desalination

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