Ultrathin nanoporous membrane fabrication based on block copolymer micelles

Zhang, Wanna; Cheng, Panpan; Cheng, Juan; Li, Nan; Wang, Yong; Yang, Jingying; Qiu, Xiaoyan; Tan, Hui; Yu, Haizhou

doi:10.1016/j.memsci.2018.10.066

Cited by 14 publications

(7 citation statements)

References 30 publications

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“…The separation ability of the MSTF⊥AAO membrane was evaluated using a dead-end filtration device (Figure S4). For tests with pure water, a ultrahigh-flux permeate flux (1027 ± 20 L m –2 h –1 bar –1 ) was determined; this value is significantly higher than the permeability of commercial ultrafiltration membranes (1–5 L m –2 h –1 bar –1 ) , and precedes most of the reported inorganic and polymer membranes, for example, amine-functionalized SBA-15, polysulfone (PSf UF), , PS- b -PAA, carbon nanotube (CNT) membranes, ZSM-5, PET, and Al 2 O 3 –TiO 2 (Figure a,b). Significantly, the MSTF⊥AAO membrane achieves such a high permeability (1027 ± 20 L m –2 h –1 bar –1 ) under the low pressure of 0.07 bar, which means that less pumping energy is demanded during filtration.…”

Section: Resultsmentioning

confidence: 88%

Diatom-Mimicking Ultrahigh-Flux Mesoporous Silica Thin Membrane with Straight-Through Channels for Selective Protein and Nanoparticle Separations

et al. 2019

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A nature-inspired mesoporous ultrafiltration membrane with unprecedented permeability and high selectivity for selective protein and nanoparticle separations is reported herein. We describe a diatom-mimicking hierarchically porous membrane that consists of a single-layer mesoporous silica thin film (MSTF) with perpendicular pores supported on top of a macroporous anodic aluminum oxide (AAO) membrane (MSTF⊥AAO) for ultrafiltration. The MSTF, with a thickness of ca. 30 nm, uniform vertical straight-through mesoporous channels (pore diameter of 5.9 ± 0.4 nm), superhydrophilicity, and continuous nonbreaking to centimeter range (area of 17.3 cm2), is overlaid on the AAO straight-through membrane, which counterintuitively exhibits both ultrahigh water permeability (1027 ± 20 L m–2 h–1 bar–1) and an excellent rejection rate (>99%) for molecules larger than 7 nm. The water permeability result is significantly higher than that of the reported nanosized channeled membranes. A model equation for calculating the theoretical permeability flux of the vertically nanochanneled membrane is established and compared with experimental results.

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Section: Resultsmentioning

confidence: 88%

Diatom-Mimicking Ultrahigh-Flux Mesoporous Silica Thin Membrane with Straight-Through Channels for Selective Protein and Nanoparticle Separations

et al. 2019

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“…[225] Phillip et al obtained a monodispersed pore size of 24 nm using poly(styrene-b-lactide) on PES support using thermally induced phase separation. [227] Zhu et al used adipic acid as an additive to stabilize poly(styrene-co-vinyl pyridine) isoporous membranes. [226] Zhang et al obtained an effective pore size of 8 nm using poly(styrene-b-acrylic acid) on a polycarbonate membrane.…”

Section: Recent Trends In Surface Modification Strategiesmentioning

confidence: 99%

“…Sutisna et al achieved featherlike and lamellar structures from poly(styrene‐b‐γ‐benzyl‐l‐glutamate) via phase inversion and spin‐coating followed by drying . Zhang et al obtained an effective pore size of 8 nm using poly(styrene‐b‐acrylic acid) on a polycarbonate membrane . Zhu et al used adipic acid as an additive to stabilize poly(styrene‐co‐vinyl pyridine) isoporous membranes .…”

Section: Membrane Modifications For Antibacterial and Antifouling Appmentioning

confidence: 99%

The Key Role of Modifications in Biointerfaces toward Rendering Antibacterial and Antifouling Properties in Polymeric Membranes for Water Remediation: A Critical Assessment

Samantaray

Madras

Bose

2019

Advanced Sustainable Systems

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Safe drinking water for all is a major challenge and needs critical attention, as freshwater aquifers are rapidly declining. A strategy based on addressing scarcity through membrane‐based purification and desalination can be an immediate and robust solution. The current scientific advances toward tailoring the structure and chemical properties of existing membrane materials have enabled key insights leading to new water purification alternatives. In the first part of the article, the key requirements for water decontamination addressed through state‐of‐the‐art literature on membranes are discussed. In the next part, the specific membrane modification strategies to impede bacterial growth and enhance fouling resistance are discussed, bringing in the underlying mechanisms. Finally, promising next‐generation separation techniques that are inspired by nature, inorganic and carbonaceous nanomaterial‐based membranes, layer‐by‐layer assembly, and dynamic composite membranes, are highlighted. This perspective article will help guide researchers working in this field from both industrial and academic standpoints, especially where the research is focused toward developing strategies to modify the existing solution besides finding alternative and sustainable new materials.

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“…For example, an isoporous membrane with high permeability and selectivity was prepared by self-assembly of PS-P4VP complexed with metal ions (such as copper, iron, and cobalt) . In another study, PS-PAA nanospheres cross-linked with zinc acetate were self-assembled and then filtered on a support membrane to prepare a ultrathin nanoporous membrane . In addition, the proportion of additive (glycerol) was adjusted to control the pore size of an isoporous membrane .…”

Section: Introductionmentioning

confidence: 99%

“…9 In another study, PS-PAA nanospheres cross-linked with zinc acetate were self-assembled and then filtered on a support membrane to prepare a ultrathin nanoporous membrane. 10 In addition, the proportion of additive (glycerol) was adjusted to control the pore size of an isoporous membrane. 11 However, the conventional isoporous membranes with fixed pore sizes could only be deployed in series for practical applications such as nanoparticle fractionation.…”

Section: Introductionmentioning

confidence: 99%

High-Flux pH-Responsive Ultrafiltration Membrane for Efficient Nanoparticle Fractionation

Wang

Cheng

et al. 2021

ACS Appl. Mater. Interfaces

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Fractionation of nanoparticles with different sizes from the mixture by using a single membrane would reduce the membrane cost and enhance the efficiency. In this study, an amphiphilic pH-responsive copolymer was prepared by grafting a pHresponsive hydrophilic polymethacrylic acid (PMAA) side chain from a hydrophobic poly(vinylidene fluoride-co-chlorotrifluoroethylene), P(VDF-CTFE) backbone. Subsequently, the isoporous pH-responsive membranes (PPMs) were prepared from the functional copolymers with different PMAA chain lengths. PPM indicated reversible pore size decreasing with the increasing pH of the feed. Moreover, the membrane pore size variation range was further extended by adjusting the PMAA side chain length of the copolymer to reach a wide range from 10.2 to 34.5 nm. Owning to the amphiphilic nature of the copolymer, PPM showed a narrow pore size distribution which is responsible for the much higher pure water flux of PPM than the conventional UF membrane with similar retention capability. In the fractionation test, the mixed 20 and 30 nm polystyrene nanoparticles were penetrating PPM at pH 11 and 3, respectively. The pH-responsive PPM indicated great potential for nanoparticle fractionation, while the uniform pores of PPM further enhanced the membrane performance in terms of permeability and selectivity.

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Ultrathin nanoporous membrane fabrication based on block copolymer micelles

Cited by 14 publications

References 30 publications

Diatom-Mimicking Ultrahigh-Flux Mesoporous Silica Thin Membrane with Straight-Through Channels for Selective Protein and Nanoparticle Separations

Diatom-Mimicking Ultrahigh-Flux Mesoporous Silica Thin Membrane with Straight-Through Channels for Selective Protein and Nanoparticle Separations

The Key Role of Modifications in Biointerfaces toward Rendering Antibacterial and Antifouling Properties in Polymeric Membranes for Water Remediation: A Critical Assessment

High-Flux pH-Responsive Ultrafiltration Membrane for Efficient Nanoparticle Fractionation

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