New emerging review on advances in block copolymer based water purification membranes

John, Rini; Pal, Kaushik; Jayan, Jitha S.; Saritha, Appukuttan; Joseph, Kuruvilla

doi:10.1016/j.molstruc.2021.129926

Cited by 15 publications

(9 citation statements)

References 122 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of an infinite component implies a long-lived state being populated, which does not decay within the experimentally accessible delay time. This long-lived state is associated with a 3 MLCT state (see T 1 spin density in Figure S9), typically dominating the ns-photochemistry of this type of Ru-complexes. τ 1 = 1 ps and τ 2 = 13 ps reflect the formation of the longlived state by intramolecular vibrational relaxation, cooling and thermalization of the 3 MLCT on the ip-ligand, which presents the ligand with the energetically lowest lying acceptor orbital.…”

Section: Absorption Resonance Raman and Emission Spectroscopymentioning

confidence: 99%

“…Hence, when dissolved in water (or embedded in the water wetted polymer membranes) the equilibrium shifts towards the protonated form of the complex as compared to ACN as solvent. The charge density shift from the imidazole-phenanthroline centered 3 MLCT to an aniline-centered 3 MLCT in the protonated form of the complex is hence reflected in the 645 ps component.…”

Section: Absorption Resonance Raman and Emission Spectroscopymentioning

confidence: 99%

“…Nanoporous block copolymer membranes, which are typically formed by self‐assembly processes, are versatile platforms that can be used for a variety of applications, for example, in flow reactors, for catalysis, for water purification, or protein separation. [ 1 , 2 , 3 , 4 , 5 ] Hereby, the underlying amphiphilic block copolymers can be adapted for different purposes, may contain a large variety of functional groups, and have large impact on the properties of the resulting membranes. The tuning of membrane properties can primarily be conducted by the application of different monomers and variation of the ratio of the share of hydrophilic and hydrophobic block.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Molecular Photosensitizer in a Porous Block Copolymer Matrix‐Implications for the Design of Photocatalytically Active Membranes

Chettri

Kruse

Jha

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

Recently, porous photocatalytically active block copolymer membranes were introduced, based on heterogenized molecular catalysts. Here, we report the integration of the photosensitizer, i. e., the light absorbing unit in an intermolecular photocatalytic system into block copolymer membranes in a covalent manner. We study the resulting structure and evaluate the orientational mobility of the photosensitizer as integral part of the photocatalytic system in such membranes. To this end we utilize transient absorption anisotropy, highlighting the temporal reorienta-tion of the transition dipole moment probed in a femtosecond pump-probe experiment. Our findings indicate that the photosensitizer is rigidly bound to the polymer membrane and shows a large heterogeneity of absolute anisotropy values as a function of location probed within the matrix. This reflects the sample inhomogeneity arising from different protonation states of the photosensitizer and different intermolecular interactions of the photosensitizers within the block copolymer membrane scaffold.

show abstract

Section: Absorption Resonance Raman and Emission Spectroscopymentioning

confidence: 99%

Section: Absorption Resonance Raman and Emission Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Molecular Photosensitizer in a Porous Block Copolymer Matrix‐Implications for the Design of Photocatalytically Active Membranes

Chettri

Kruse

Jha

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…BCP templating can readily construct isoporous membranes at a low cost, which makes it one of the most attractive approaches for fabricating ultrafiltration membranes. To date, there are numerous reports about the use of BCP self-assembly to prepare ultrafiltration membranes, which have been extensively applied in the chemical industry, food production, environmental studies, and biomedicine (Jackson and Hillmyer, 2010;Werber et al, 2016;Greil et al, 2017;John et al, 2021).…”

Section: Ultrafiltration Membranesmentioning

confidence: 99%

Fabrication of Nanodevices Through Block Copolymer Self-Assembly

Xiong

2022

Front. Nanotechnol.

View full text Add to dashboard Cite

Block copolymer (BCP) self-assembly, as a novel bottom-up patterning technique, has received increasing attention in the manufacture of nanodevices because of its significant advantages of high resolution, high throughput, low cost, and simple processing. BCP self-assembly provides a very powerful approach to constructing diverse nanoscale templates and patterns that meet large-scale manufacturing practices. For the past 20 years, the self-assembly of BCPs has been extensively employed to produce a range of nanodevices, such as nonvolatile memory, bit-patterned media (BPM), fin field-effect transistors (FinFETs), photonic nanodevices, solar cells, biological and chemical sensors, and ultrafiltration membranes, providing a variety of configurations for high-density integration and cost-efficient manufacturing. In this review, we summarize the recent progress in the fabrication of nanodevices using the templates of BCP self-assembly, and present current challenges and future opportunities.

show abstract

“…Then, governing factors in the SNIPS process which affect the preparation and structural characteristics of integral asymmetric isoporous membranes will be fully reviewed in an interpretative way. Considering the topic, following aspects are not included in this paper; studies on BCP thin film membranes, [27] modeling, and simulation of nonequilibrium processes in membrane formation via SNIPS, [56] membrane fabrication methods along with separation mechanisms and applications, [57,58] developments in membranes based on tailored BCPs, [43,59,60] and perspectives in the field of BCP membranes, [26,55] which have been already reviewed. In spite of previously published reviews on the subject of BCP membranes, mechanisms of pore-formation and effective factors of the process have not yet been summarized/reviewed all in together.…”

Section: Introductionmentioning

confidence: 99%

How does Micro‐ and Macro‐Phase Separation of Block Copolymers Affect the Formation of Integral Asymmetric Isoporous Membranes? A Review on Effective Factors

Foroutani

Ghasemi

2022

Macro Materials & Eng

View full text Add to dashboard Cite

Self-standing isoporous membranes based on amphiphilic block copolymers (BCPs) are an outstanding candidate for efficient separation processes. Such fascinating membranes have been generated through combining the BCP self-assembly (micro-phase separation) together with the classical non-solvent induced phase separation (macro-phase separation), known as SNIPS process. However, the controllability, reproducibility, and cost-effectiveness of the process along with the mechanism for pores generation are still challenging in the SNIPS strategy, especially when new BCP or conditions are utilized. It is mainly due to the narrow efficacy window of numerous variables influencing the desired structure formation. In this review, first, an overview of the one-step readily scalable SNIPS technique and the stepwise explanation of the process are given. Then the formation mechanism of SNIPS membranes, according to the related hypotheses and assumptions proposed on the basis of experimental evidence so far, is presented and discussed. As the main focus , governing factors in the SNIPS process which affect the preparation and structural characteristics of final membrane structures are entirely reviewed and interpreted. This review will help to have a better understanding of the connection between determinant factors and final membrane structure, which facilitates successful preparation of BCP membranes via SNIPS.

show abstract

New emerging review on advances in block copolymer based water purification membranes

Cited by 15 publications

References 122 publications

A Molecular Photosensitizer in a Porous Block Copolymer Matrix‐Implications for the Design of Photocatalytically Active Membranes

A Molecular Photosensitizer in a Porous Block Copolymer Matrix‐Implications for the Design of Photocatalytically Active Membranes

Fabrication of Nanodevices Through Block Copolymer Self-Assembly

How does Micro‐ and Macro‐Phase Separation of Block Copolymers Affect the Formation of Integral Asymmetric Isoporous Membranes? A Review on Effective Factors

Contact Info

Product

Resources

About