Carbon nanotubes and graphene oxide-based solvent-free hybrid nanofluids functionalized mixed-matrix membranes for efficient CO2/N2 separation

Wang, Dechao; Yao, Dongdong; Wang, Yudeng; Wang, Feng; Xin, Yangyang; Song, Shan Shan; Zhang, Zhilin; Su, Fangfang; Zheng, Yaping

doi:10.1016/j.seppur.2019.04.005

Cited by 53 publications

(46 citation statements)

References 67 publications

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“…Similar behavior was reported by Wang et al [ 67 ], where covalently grafted polyetheramine (M2070)-carbon nanotubes or graphene oxide solvent-free hybrid nanofluids were embedded into Pebax-1657. By this effort, the authors achieved a CO 2 /N 2 separation factor of 72 with a CO 2 permeability of 332 Barrer at 1.0 bar and 25 °C under dry mixed feed gases state.…”

Section: Resultssupporting

confidence: 83%

A Study of the Reinforcement Effect of MWCNTs onto Polyimide Flat Sheet Membranes

et al. 2020

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Polyimides rank among the most heat-resistant polymers and find application in a variety of fields, including transportation, electronics, and membrane technology. The aim of this work is to study the structural, thermal, mechanical, and gas permeation properties of polyimide based nanocomposite membranes in flat sheet configuration. For this purpose, numerous advanced techniques such as atomic force microscopy (AFM), SEM, TEM, TGA, FT-IR, tensile strength, elongation test, and gas permeability measurements were carried out. In particular, BTDA–TDI/MDI (Ρ84) co-polyimide was used as the matrix of the studied membranes, whereas multi-wall carbon nanotubes were employed as filler material at concentrations of up to 5 wt.% All studied films were prepared by the dry-cast process resulting in non-porous films of about 30–50 μm of thickness. An optimum filler concentration of 2 wt.% was estimated. At this concentration, both thermal and mechanical properties of the prepared membranes were improved, and the highest gas permeability values were also obtained. Finally, gas permeability experiments were carried out at 25, 50, and 100 °C with seven different pure gases. The results revealed that the uniform carbon nanotubes dispersion lead to enhanced gas permeation properties.

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Section: Resultssupporting

confidence: 83%

A Study of the Reinforcement Effect of MWCNTs onto Polyimide Flat Sheet Membranes

et al. 2020

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“…By comparing the CO 2 and nitrogen permeability, membrane selectivity can be obtained which is also presented in Figure 11 as a black line. Interestingly, this parameter was substantially unaffected by the addition of the filler, somewhat in contrast with the expected behavior since GO is usually considered to be selective towards CO 2 and already proved to be able to improve polymer selectivity when used to obtain mixed matrix membranes [ 41 , 42 , 43 , 44 , 45 , 46 , 47 ].…”

Section: Resultsmentioning

confidence: 93%

“…Among the many possible fillers usually considered, GO-based nanomaterials have recently attracted much interest and have been widely employed in carbon capture for their capability of enhancing membranes’ gas permselective properties and chemical tunability, with many examples already available in literature [ 41 , 42 , 43 , 44 , 45 , 46 , 47 ] and, also, described in reviews such as the one about 0D and 2D filler MMMs by Janakiram et al [ 48 ], or the one specific for graphene and graphene oxide materials from Yoo et al [ 49 ], or even the wider and more general review by Sun et al [ 50 ]. Among the many available studies, one can recall the work from Anastasiou et al [ 46 ], which increased both polysulfone’s CO 2 permeability (from about 0.9 to 1.8 barrer) and CO 2 /N 2 selectivity (from about 0.8 to 5) by using a combined system ZIF-8 plus graphene oxide as nanofiller.…”

Section: Introductionmentioning

confidence: 99%

Pebax® 2533/Graphene Oxide Nanocomposite Membranes for Carbon Capture

et al. 2020

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In this work, the behavior of new GO-based mixed matrix membranes was tested in view of their use as CO2-selective membrane in post combustion carbon capture applications. In particular, the new materials were obtained by mixing of Pebax® 2533 copolymer with different types of graphene oxide (GO). Pebax® 2533 has indeed lower selectivity, but higher permeability than Pebax® 1657, which is more commonly used for membranes, and it could therefore benefit from the addition of GO, which is endowed with very high selectivity of CO2 with respect to nitrogen. The mixed matrix membranes were obtained by adding different amounts of GO, from 0.02 to 1% by weight, to the commercial block copolymers. Porous graphene oxide (PGO) and GO functionalized with polyetheramine (PEAGO) were also considered in composites produced with similar procedure, with a loading of 0.02%wt. The obtained films were then characterized by using SEM, DSC, XPS analysis and permeability experiments. In particular, permeation tests with pure CO2 and N2 at 35°C and 1 bar of upstream pressure were conducted for the different materials to evaluate their separation performance. It has been discovered that adding these GO-based nanofillers to Pebax® 2533 matrix does not improve the ideal selectivity of the material, but it allows to increase CO2 permeability when a low filler content, not higher than 0.02 wt%, is considered. Among the different types of GO, then, porous GO seems the most promising as it shows CO2 permeability in the order of 400 barrer (with an increase of about 10% with respect to the unloaded block copolymer), obtained without reducing the CO2/N2 selectivity of the materials, which remained in the order of 25.

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“…Mainly, the adsorption process occurs in the MMM comes from the dispersed filler particles. The fillers incorporated into the polymer matrix can be classified into porous (zeolite [65], graphene oxide [66], carbon molecular sieve (CMS) [67], metal organic framework (MOF) [68] and carbon nanotubes (CNTs) [69]) and nonporous (silica [70] and titanium oxide (TiO 2 ) [71]) fillers [72]. For porous filler, the transportation of gas molecules through the filler follows the effects of molecular sieve and surface diffusion [73].…”

Section: Gas Permeation Mechanism Through Mixed Matrix Membrane (Mmm)mentioning

confidence: 99%

Potential of adsorbents from agricultural wastes as alternative fillers in mixed matrix membrane for gas separation: A review

Ghazali

Rahman

Samah

2020

Green Processing and Synthesis

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AbstractMixed matrix membrane (MMM), formed by dispersing fillers in polymer matrix, has attracted researchers’ attention due to its outstanding performance compared to polymeric membrane. However, its widespread use is limited due to high cost of the commercial filler which leads to the studies on alternative low-cost fillers. Recent works have focused on utilizing agricultural wastes as potential fillers in fabricating MMM. A membrane with good permeability and selectivity was able to be prepared at low cost. The objective of this review article is to compile all the available information on the potential agricultural wastes as fillers in fabricating MMM for gas separation application. The gas permeation mechanisms through polymeric and MMM as well as the chemical and physical properties of the agricultural waste fillers were also reviewed. Additionally, the economic study and future direction of MMM development especially in gas separation field were discussed.

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Carbon nanotubes and graphene oxide-based solvent-free hybrid nanofluids functionalized mixed-matrix membranes for efficient CO2/N2 separation

Cited by 53 publications

References 67 publications

A Study of the Reinforcement Effect of MWCNTs onto Polyimide Flat Sheet Membranes

A Study of the Reinforcement Effect of MWCNTs onto Polyimide Flat Sheet Membranes

Pebax® 2533/Graphene Oxide Nanocomposite Membranes for Carbon Capture

Potential of adsorbents from agricultural wastes as alternative fillers in mixed matrix membrane for gas separation: A review

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