Improvement in the permeation performance of hybrid membranes by the incorporation of functional multi-walled carbon nanotubes

Wang, Ting; Shen, Jiangnan; Wu, Li–guang; Bruggen, Bart Van der

doi:10.1016/j.memsci.2014.04.054

Cited by 33 publications

(44 citation statements)

References 24 publications

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“…Based on the results in our former works [6,8], the p bonding between benzene molecules and nanomaterials in hybrid membranes played key role in the enhancement on the separation performance for benzene, including the swelling performance of membrane. In hybrid membranes containing GO or Ag-GO samples, the p interaction between small Ag nanoparticles or GO and benzene molecules would form instantly, when benzene molecules diffused through the hybrid membranes [6,8]. Therefore, addition of GO or Ag-GO increased greatly the DS at equilibrium of hybrid membranes in benzene, as shown in Fig.…”

Section: Separation Performance Of Different Membranesmentioning

confidence: 94%

“…Therefore, the separation performance of different membranes was evaluated by two parameters in this work, namely, permeation flux (J) and separation factor (b), for clear comparison with the results in our former works [6,8]. Flux is defined as the rate of permeation of a feed component through a unit area of the membrane per unit time.…”

Section: Pervaporation Experiments Of Benzene/cyclohexane Mixturesmentioning

confidence: 99%

“…Based on the results in the previous works [6,15], the relationship between sorption amount and sorption time of benzene and cyclohexane in hybrid membranes containing GO and different Ag-GO samples were investigated (as shown in Figs. S7 and S8, Supporting Material).…”

Section: Separation Performance Of Different Membranesmentioning

confidence: 99%

“…Incorporation of nanomaterials into polymer matrix to generate a novel organic-inorganic membrane has gained increased attention because of its high separation performance [3,4]. Organic-inorganic hybrid membranes containing various nanomaterials have been fabricated and studied; these materials include nanoparticles with zero-dimensional structure [5], nanotubes with one-dimensional structure [6], and nanosheets [7]. Addition of AgCl or Ag nanoparticles into polymer membranes can significantly enhance the separation performance of the resulting membranes because of the combination of Ag + ions and double bonds in the aromatic or olefinic molecules [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Qiu et al [15] reported that CNT-incorporated membranes are easier to penetrate and exhibit higher flux performance than pristine membranes. We also fabricated a PU membrane containing MWCNTs with high separation performance for benzene and CO 2 separation [6]. The maximum separation factor of PU hybrid membrane in PV experiments for benzene/cyclohexane mixtures was more than five times higher than that of the PU membrane.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced performance of polyimide hybrid membranes for benzene separation by incorporating three-dimensional silver–graphene oxide

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et al. 2016

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Section: Separation Performance Of Different Membranesmentioning

confidence: 94%

Section: Pervaporation Experiments Of Benzene/cyclohexane Mixturesmentioning

confidence: 99%

Section: Separation Performance Of Different Membranesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced performance of polyimide hybrid membranes for benzene separation by incorporating three-dimensional silver–graphene oxide

Dai

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et al. 2016

Journal of Colloid and Interface Science

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Improved performance of polyvinylidene fluoride membrane blended with modified multi‐walled carbon nanotubes by electret treatment

Shi,

Wang,

Hou

et al. 2023

J of Applied Polymer Sci

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In this paper, electret treatment was used to enhance the electrostatic repulsion between the membrane and bovine serum albumin, so as to improve the anti‐fouling ability and recycling rate of the membrane. The polarization charge is provided by the dipole orientation of polyvinylidene fluoride (PVDF) materials, and the space charge is composed of the interfacial charge between the filler and the matrix and the bulk charge of the hollow structure of the multi‐walled carbon nanotubes. The results showed that after electret treatment, the surface potential of the membrane increased, the PVDF crystal type changed from α to β, and the crystallinity increased. Grafting of N‐vinylpyrrolidone onto multi‐walled carbon nanotubes (MWCNTs‐g‐PVP), which contain a large number of hydrophilic groups after modification, reduces the contact angle of the composite film from 86.9° to 62.7°. The pure water flux and flux recovery rate of MWCNTs‐g‐PVP/PVDF composite membranes after electret treatment was increased from 189.31 L·m−2·h−1 and 90% to 233.55 L·m−2·h−1 and 94.7%, respectively, and the rejection rate increased about 30%. Through the circulation experiment, it can be seen that the anti‐fouling performance and recycling rate of the membrane is improved, which is caused by electrostatic repulsion.

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Enhancement on the permeation performance of polyimide mixed matrix membranes by incorporation of graphene oxide with different oxidation degrees

Cheng

Chen

et al. 2015

Polymers for Advanced Techs

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Graphene oxide (GO) with different oxidation degrees were synthesized by harsh oxidation of graphite using the improved Hummers method. The GO/polyimide (PI) mixed matrix membrane was successfully fabricated by in situ polymerization of PI monomers (3,3′,4,4′-biphenyltetracarboxylic dianhydride and 4,4′-diaminodiphenyl ether) with GO. The structure of GO was characterized by Fourier transform infrared, transmission electron microscopy, atomic force microscopy, X-ray diffraction, and thermal gravimetric analysis-differential thermal analysis. The performance of different GO/PI mixed matrix membranes was evaluated by permeation experiments of CO 2 /N 2 gas mixture (volume ratio, 1:9). Results showed that more polar functional groups were introduced to GO with the increase in oxidation degree of GO in the preparation process, producing fewer layers and more translucent structures. GO with higher oxidation degree has significant effect on its dispersion in the N,N-dimethylacetamide solvent and polymer matrix materials. The permeability of GO/PI hybrid membranes for CO 2 and N 2 increased. The CO 2 /N 2 permeation selectivity of membranes exhibited a trend of initial increase, followed by a decrease, with the increase in oxidation degree, when the same amount of GO was added. For GO with the same oxidation degree, the permeability and permeation selectivity of hybrid membrane initially increased, and then decreased with the addition content of GO. In the case of hybrid membrane containing 1 wt% monolayer GO, the maximum permeability and permeation selectivity of hybrid membranes for CO 2 were 14.3 and 4.2 times more than that of PI membrane without GO, respectively.

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Improvement in the permeation performance of hybrid membranes by the incorporation of functional multi-walled carbon nanotubes

Cited by 33 publications

References 24 publications

Enhanced performance of polyimide hybrid membranes for benzene separation by incorporating three-dimensional silver–graphene oxide

Enhanced performance of polyimide hybrid membranes for benzene separation by incorporating three-dimensional silver–graphene oxide

Improved performance of polyvinylidene fluoride membrane blended with modified multi‐walled carbon nanotubes by electret treatment

Enhancement on the permeation performance of polyimide mixed matrix membranes by incorporation of graphene oxide with different oxidation degrees

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