Airflow-induced nanochannel orientation in mesoporous polymers and carbon films

Wu, Yimeng; Lü, Xuemin; Lu, Qinghua

doi:10.1016/j.micromeso.2015.03.004

Cited by 3 publications

(4 citation statements)

References 54 publications

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“…For example, Wu et al demonstrated the ability to orient pore channels within mesoporous carbon films through exposure to air flows. 214 Resol and P123 were combined together in solution, and then deposited onto silicon substrates and exposed to a stream of hot air (80 C) for 20 s. The shear force and rapid evaporation of solvent caused by the hot air stream resulted in highly aligned templates with morphologies that can be retained through the carbonization process. Moreover, a recent work (Figure 11) utilized an F127 soft-template, dopamine as a carbon precursor, and benzene as a 202 Reprinted with permission from Qiang et al 202 Copyright 2015.…”

Section: Directional Pore Channels Through Alignmentmentioning

confidence: 99%

Mesoporous carbons from self‐assembled polymers

Robertson

Zagho

Nazarenko

et al. 2022

Journal of Polymer Science

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Polymer self-assembly provides a robust and cost-efficient nanomanufacturing platform for enabling a broad range of applications, such as microelectronics, drug delivery, and separation membranes. This review focuses on discussing the progress and opportunities of self-assembled polymer in the synthesis of mesoporous carbons (MCs), which have aroused significant research interests over the past decades. Specifically, we will discuss the two most established approaches for converting nanostructured polymers to MCs, including templating-based and direct pyrolysis-based methods. We will also review the fundamental ordering mechanisms and kinetics of these polymeric systems and discuss the recent development of engineering methods for providing ondemand control over the pore size and morphology of MCs. Additionally, this review article also includes a section focusing on the strategies to further functionalize these materials from self-assembled polymers to enhance their performance, such as chemical activation, heteroatom doping, introduction of nanoparticles into the carbon matrix, and enhancing graphitization degree of carbon walls. Finally, a brief perspective is provided about the emerging research opportunity in this exciting field.

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Section: Directional Pore Channels Through Alignmentmentioning

confidence: 99%

Mesoporous carbons from self‐assembled polymers

Robertson

Zagho

Nazarenko

et al. 2022

Journal of Polymer Science

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“…[504] Additionally, Pluronic surfactants and resol carbon precursors have been aligned by simply applying air flow to the surface of the system. [505] Manipulating variables like the airflow velocity and precursor concentration resulted in high degrees of orientation, highlighting the potential of this technique to be applied to largescale production processes. Using solvent vapor annealing with shear method, mesoporous carbon films with aligned cylindrical structures can be prepared.…”

Section: Deriving Functional Inorganic Porous Materialsmentioning

confidence: 99%

Developing Anisotropy in Self‐Assembled Block Copolymers: Methods, Properties, and Applications

Robertson

Zhou

et al. 2021

Macromol. Rapid Commun.

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Block copolymers (BCPs) self-assembly has continually attracted interest as a means to provide bottom-up control over nanostructures. While various methods have been demonstrated for efficiently ordering BCP nanodomains, most of them do not generically afford control of nanostructural orientation. For many applications of BCPs, such as energy storage, microelectronics, and separation membranes, alignment of nanodomains is a key requirement for enabling their practical use or enhancing materials performance. This review focuses on summarizing research progress on the development of anisotropy in BCP systems, covering a variety of topics from established aligning techniques, resultant material properties, and the associated applications. Specifically, the significance of aligning nanostructures and the anisotropic properties of BCPs is discussed and highlighted by demonstrating a few promising applications. Finally, the challenges and outlook are presented to further implement aligned BCPs into practical nanotechnological applications, where exciting opportunities exist.

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“…In addition to the zone‐annealing method, Vogt and co‐workers also reported that solvent‐vapor annealing, coupled with shear‐force application using an elastomeric pad, was effective for the alignment of block copolymers, which successfully served as templates for the formation of oriented mesoporous carbon films . Furthermore, Lu and co‐workers reported the synthesis of oriented mesoporous carbon film templated with LC cylinders that were aligned by the air‐flow drying method, as an extension of their work on the synthesis of oriented mesoporous metal oxides (Section ) …”

Section: Macroscopically Oriented Crosslinked Porous Polymers From Lcsmentioning

confidence: 99%

“…This progress report presents an overview of recent studies on the synthesis, properties, and applications of porous materials with macroscopically oriented structures ( Table 1 ). The scope of this report is limited to porous materials with nano‐ or mesoscale periodic channels constructed by supramolecular self‐assembly of atomic and/or molecular components, such as zeolites (Section ), MOFs (Section ), mesoporous oxides (Section ), and polymers based on liquid crystals (LCs) (Section ) . In other words, porous materials produced by physical processes, such as anodic aluminum oxides or porous silicones, are beyond the scope of this report.…”

Section: Introductionmentioning

confidence: 99%

Macroscopically Oriented Porous Materials with Periodic Ordered Structures: From Zeolites and Metal–Organic Frameworks to Liquid‐Crystal‐Templated Mesoporous Materials

Cho¹,

Ishida²

2017

Advanced Materials

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Porous materials with molecular‐sized periodic structures, as exemplified by zeolites, metal–organic frameworks, or mesoporous silica, have attracted increasing attention due to their range of applications in storage, sensing, separation, and transformation of small molecules. Although the components of such porous materials have a tendency to pack in unidirectionally oriented periodic structures, such ideal types of packing cannot continue indefinitely, generally ceasing when they reach a micrometer scale. Consequently, most porous materials are composed of multiple randomly oriented domains, and overall behave as isotropic materials from a macroscopic viewpoint. However, if their channels could be unidirectionally oriented over a macroscopic scale, the resultant porous materials might serve as powerful tools for manipulating molecules. Guest molecules captured in macroscopically oriented channels would have their positions and directions well‐defined, so that molecular events in the channels would proceed in a highly controlled manner. To realize such an ideal situation, numerous efforts have been made to develop various porous materials with macroscopically oriented channels. An overview of recent studies on the synthesis, properties, and applications of macroscopically oriented porous materials is presented.

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Airflow-induced nanochannel orientation in mesoporous polymers and carbon films

Cited by 3 publications

References 54 publications

Mesoporous carbons from self‐assembled polymers

Mesoporous carbons from self‐assembled polymers

Developing Anisotropy in Self‐Assembled Block Copolymers: Methods, Properties, and Applications

Macroscopically Oriented Porous Materials with Periodic Ordered Structures: From Zeolites and Metal–Organic Frameworks to Liquid‐Crystal‐Templated Mesoporous Materials

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