Nickel hydroxide nanosheet membranes with fast water and organics transport for molecular separation

Qu, Yan; Zhang, Qiu Gen; Liu, Changkun; Gao, Runsheng; Lv, Rui Xue; Lin, Chen; Chen, Meng Meng; Zhu, Ai Mei

doi:10.1039/c6nr06612g

Cited by 23 publications

(19 citation statements)

References 43 publications

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“…Unlike polymers, 2D materials comprise rigid lamellar layers. Solvents can pass through the pores of lamellar layers, the edges of adjacent 2D materials and the nanochannels that are created through functionalization 58,[62][63][74][75][76]. The rejection performance depends on the interval between two lamellar layers, surface charge and the total number of lamellar layers, i.e., membrane thickness.…”

Section: Ums Membrane Materialsmentioning

confidence: 99%

“…By incorporating carbon nanodots between GO sheets, Wang et al obtained water permeances as high as 439 L m −2 h −1 bar −1 in a GO composite that rejected 96 % of Rhodamine [37]. Other 2D materials were also deployed to fabricate the UMS membranes [53,54,58]. Laminar MoS 2 sheets with single atom thickness exhibited a water permeance of 245 L h −1 m −2 bar −1 .…”

Section: D Materials: An Emerging Ums Membrane Materialsmentioning

confidence: 99%

“…Hence, the technology-readiness level and potential of graphene/graphene oxide-based materials to be manufactured as UMS membranes is marked as medium. [61,254] 2D materials Graphene/Graphene oxide (NF) Filtration-coating High selectivity Far [32,35] Graphene/Graphene oxide with nanochannels (NF) Filtration-coating High selectivity and high permeability Medium [36,37,55,62] Other 2D materials (NF) with nanochannels Filtration-coating High selectivity and high permeability Medium [52,53,58] Other materials Carbon or Si-based materials (NF) CVD/3D printing High selectivity and high permeability Medium [31,169,181] Liquid crystal materials Transcription method High selectivity Far [263][264][265][266] Janus membranes Surface modifications High permeability Far [275,276] 5 Outlook-challenges overhead…”

Section: Other Promising Emerging Materialsmentioning

confidence: 99%

“…For polymeric membranes, the main way to facilitate the water or solvent passing through the UMS membranes is to build an ultrathin selective layer and build nanochannels [24][25][26][27][28][29]57], since polymeric membranes are soft and. For 2D material-based UMS membranes, it is easier to accelerate the permeance through etching pores on lamellar layers, enlarging the interval between each lamellar layer through the incorporation of nanotubes or nanodots, adjusting the whole thickness of the selective layer, tailoring the size of each lamellar layer and building nanochannels [32][33][34][35][36][37][52][53][54][55][56]58,[74][75][76][77]. - [26] PLAC/NF Millipore Regenerated cellulose Unknown Protoporphyrin (100 %) 1 <2 Extremely low - [26] UMS (NF) Gorgojo a Referred from internet: http://www.millipore.com/techpublications/tech1/pf1172en00, http://www.sterlitech.com/flat-sheet-membranes-specifications.html#UF; UMS (UF) means the pores of UMS membranes are in UF range, correspondingly the UMS (NF) means the pore of UMS membranes are in NF range.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Towards sustainable ultrafast molecular-separation membranes: From conventional polymers to emerging materials

Cheng

Wang

Jiang

et al. 2018

Progress in Materials Science

265

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Ultrafast molecular separation (UMS) membranes are highly selective towards active organic molecules such as antibiotics, amino acids and proteins that are 0.5-5 nm wide while lacking a phase transition and requiring a low energy input to achieve high speed separation. These advantages are the keys for deploying UMS membranes in a plethora of industries, including petrochemical, food, pharmaceutical, and water treatment industries, especially for dilute system separations. Most recently, advanced nanotechnology and cutting-edge nanomaterials have been combined with membrane separation technologies to generate tremendous potential for accelerating the development of UMS membranes. It is therefore critical to update the broader scientific community on the important advances in this exciting, interdisciplinary field. This review emphasizes the unique separation capabilities of UMS membranes, theories underpinning UMS membranes, traditional polymeric materials and nanomaterials emerging on the horizon for advanced UMS membrane fabrication and technical

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Section: Ums Membrane Materialsmentioning

confidence: 99%

Section: D Materials: An Emerging Ums Membrane Materialsmentioning

confidence: 99%

Section: Other Promising Emerging Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Towards sustainable ultrafast molecular-separation membranes: From conventional polymers to emerging materials

Cheng

Wang

Jiang

et al. 2018

Progress in Materials Science

265

View full text Add to dashboard Cite

show abstract

“…Their performance has been improved by many strategies, including crosslinking, developing new and improved fabrication processes, membrane modification, and fabricating nanocomposite and mixed matrix membranes . Lately, research on SRNF membranes has focused on fabricating membranes from completely new materials such as graphene and other carbon materials, metal hydroxides, and metal–organic framework membranes, or from new polymers . One very promising group of materials for SRNF TFC membranes is polyelectrolyte (PE).…”

Section: Introductionmentioning

confidence: 99%

Thin‐Film Composite Polyionic Liquid Gel Membranes and Their Potential for Nanofiltration in Organic Solvents

Alkharabsheh

Bernstein

2018

Adv Materials Inter

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processes, [13][14][15][16] membrane modification, [17] and fabricating nanocomposite and mixed matrix membranes. [1,[18][19][20][21][22][23] Lately, research on SRNF membranes has focused on fabricating membranes from completely new materials such as graphene and other carbon materials, [24][25][26] metal hydroxides, [27] and metal-organic framework membranes, [28,29] or from new polymers. [30][31][32][33][34] One very promising group of materials for SRNF TFC membranes is polyelectrolyte (PE). PE-based SRNF membranes fabricated by layer-by-layer deposition or coating techniques [35][36][37] showed promising high selectivities, however, their permeabilities were low. [38] The low solubility of PEs in organic solvents due to charge condensation as well as thick active layers were probably the two main reasons for the low permeabilities. [39] Reducing the active layer thickness by decreasing the number of layers improved the permeability, but also reduced the selectivity. [38] Other approaches to increasing the permeability of PE-based membranes included incorporating graphene oxide nanosheets into the PE, [40] fabricating an ionically crosslinked asymmetric PE membrane, [41] using a weak PE [42] and a branched PE. [38] A promising new type of PE for fabricating SRNF TFC membranes which is yet to be explored is polymeric ionic liquids (PILs). PILs are solid, strong PEs that carry an ionic liquid species (cationic or anionic) constrained to the repeating units in the PE chain. [43] Unlike traditional PEs, in organic solvents PILs can swell and their counterion is delocalized, depending on the polymer and counterion types, mainly due to the hydrophobic character of the counterion and the reduced Coulombic interactions. [43,44] The swelling of the active layer in solvents is an important parameter that influences the membrane performance, that is, permeance and selectivity. [35] Low membrane permeance can be attributed to low swelling of the active layer, [45,46] but high swelling results in low selectivity or low membrane stability, [38,47,48] hence, the swelling degree of PILbased membranes must be restricted. This can be achieved by the addition of a cross-linker monomer (i.e., PIL gel) and by the choice of the PIL monomer and counterion. [49,50] Membrane permeance is also proportional to the active layer thickness: high permeability requires a thin active layer. [14,38] The selectivity of crosslinked PE-based nanofiltration membranes is proportional to the surface charge and the membrane molecular weight cutoff, namely, the cross-linker density. [35,38] The Polymeric ionic liquid (PIL) gels can serve as a promising material for the fabrication of solvent resistance nanofiltration (SRNF) membranes, given the solubility and the high delocalization of the counterion of PILs in organic solvents. This research describes the fabrication of a new thin-film composite membrane (TFC) with a crosslinked PIL (i.e., PIL gel) as an active layer and demonstrates its great potential as an SRNF membrane. A hydrophobic and positiv...

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Lightweight All Graphene‐Based Two‐Phase Heat Transport Devices

Zheng

Shen

Wang

et al. 2023

Adv Materials Inter

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interactions of weak van der Waals force to form thick graphene-based film, and the films are not strong enough to withstand tensile and compression due to weak connection. [1] Past efforts in solving this problem were focused on improving the strength of graphene-based films through incorporating a polymer as a binder. [2][3][4] While this strategy has helped improve the mechanical performance of graphene-based films, it leads to the deterioration of other properties, such as thermal properties. The use of polymer binders greatly reduces the thermal conductivity of graphene-based film due to the low thermal conductivity of polymers and the high inherent interfacial thermal resistance between graphene and polymers. [5,6] To improve the thermal conductivity of graphene-based films, one effective solution is to incorporate polymers with high intrinsic thermal conductivity, [7] but the improvement is limited to a certain level.In order to generate graphene-based systems with high thermal conductivity, graphene films can be used as casing materials to prepare a two-phase heat transport device (TPHTD). Such a device mainly relies on the phase change heat transfer process and takes advantage of both the large latent heat and the fast flow of the vapor from the evaporator to the condenser to realize efficient heat transfer, thus achieving high thermal conductivity, enabling its extensive use in thermal management devices. [8][9][10] So far, graphene has been used in two different ways for the TPHTD. In one way, graphene is coated on the inner wall of the metal-based casing in the TPHTD. [11][12][13][14] While this approach improves the thermal conductivity of the TPHTD due to good-wettability and low flow resistance of working medium on the surface of graphene, the resulting device is still heavy due to the metal-based casing, which does not take advantage of the lightweight property of graphene. The other is to use graphene as the casing material and metal frame as the support to prepare TPHTDs. [15] Such an approach still has not yet been realized to lightweight all graphene-based TPHTDs. To achieve all graphene-based TPHTDs with high thermal performance, an alternative approach is needed to form reliable binding between graphene nanosheets at nanoscale and achieve desired geometry of devices at macroscale. Graphene-based composites show great potential in the development of lightweight functional devices and systems, and polymers are usually used as binders to enhance the mechanical properties of these composites. Due to the low thermal conductivity of the polymer and the high inherent interfacial thermal resistance between polymer and graphene, however, the developed devices and systems generally possess low thermal conductivity, which seriously limits their further thermal-related applications. Here, a lightweight two-phase heat transport device (TPHTD) based on a vapor-liquid phase transition-based heat transfer by using a graphene-based composite material as the casing is generated. The graphene-based TPHTD has h...

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Nickel hydroxide nanosheet membranes with fast water and organics transport for molecular separation

Cited by 23 publications

References 43 publications

Towards sustainable ultrafast molecular-separation membranes: From conventional polymers to emerging materials

Towards sustainable ultrafast molecular-separation membranes: From conventional polymers to emerging materials

Thin‐Film Composite Polyionic Liquid Gel Membranes and Their Potential for Nanofiltration in Organic Solvents

Lightweight All Graphene‐Based Two‐Phase Heat Transport Devices

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