Condensing Vapor Phase Polymerization (CVPP) of Electrochemically Capacitive and Stable Polypyrrole Microtubes

Santino, Luciano M.; Hwang, Erica; Diao, Yifan; Lu, Yanfen; Wang, Hongmin; Jiang, Qisheng; Singamaneni, Srikanth; D’Arcy, Julio M.

doi:10.1021/acsami.7b13874

Cited by 25 publications

(35 citation statements)

References 53 publications

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“…Our approach is to coat fired red bricks with [FeCl 4 ] − -doped poly(3,4-ethylenedioxythiophene) (PEDOT) microtubes, which exhibit hygroscopic behavior, environmental stability, and electrical conductivity, facilitating water uptake and release. The mechanism for microtube evolution is reported in a previous study . The [FeCl 4 ] − dopant is hygroscopic due to the coordinative interaction between Fe 3+ empty electron orbitals and H 2 O electron lone pairs that promote the nucleation of droplets from atmospheric water.…”

Section: Introductionmentioning

confidence: 77%

Microtubular PEDOT-Coated Bricks for Atmospheric Water Harvesting

Wang

Yang

Woon

et al. 2021

ACS Appl. Mater. Interfaces

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Atmospheric water harvesting is a promising technology for alleviating global water scarcity. Current water sorption materials efficiently capture water vapor from ubiquitous air; however, they are difficult to scale up due to high costs, complex device engineering, and intensive energy consumption. Fired red brick, a low-cost masonry construction material, holds the potential for developing large-scale functional architectures. Here, we utilize fired red brick for atmospheric water harvesting by integrating a microtubular coating of the conducting polymer PEDOT within its inorganic microstructure. This microtubular polymer coating affords hygroscopicity and high surface area for water nucleation, enables capillary forces to promote water transport, and enhances the water harvesting efficiency. Our brick composite achieves a maximum water vapor uptake of ∼200 wt % versus polymer mass at 95% relative humidity, decreasing to ∼15 wt % at 40% relative humidity. Facile water release is demonstrated via thermal, electrical, and illuminative heating. This proof-of-concept study demonstrates the potential of masonry construction materials for large-scale atmospheric water harvesting.

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Section: Introductionmentioning

confidence: 77%

Microtubular PEDOT-Coated Bricks for Atmospheric Water Harvesting

Wang

Yang

Woon

et al. 2021

ACS Appl. Mater. Interfaces

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“…Here, the life cycle of OMPW was evaluated in 1 M H 2 SO 4 electrolyte by potential ( Figure 5 c). During the initial 250 cycles, as the number of cycle increased, the electrode material was gradually infiltrated by the electrolyte and more and more sites were activated, resulting in an increase in capacitance [ 27 , 28 , 29 ]. The capacitive retention of OMPW after 1000 cycles was calculated as 71% of the initial value.…”

Section: Resultsmentioning

confidence: 99%

Polypyrrole Nanowires with Ordered Large Mesopores: Synthesis, Characterization and Applications in Supercapacitor and Lithium/Sulfur Batteries

et al. 2019

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In this work, we report the preparation of polypyrrole nanowires with ordered large mesopores (OMPW) by a simple chemical polymerization method from dual templates synthesized by self-assembling silica nanospheres in porous anodic aluminum oxide (AAO) membrane channels. The obtained OMPW showed a large surface area (231.5 m2 g−1), high aspect ratio, and interconnected large mesopores (~23 nm). The OMPW was tested as a supercapacitor electrode and showed a specific capacitance of 453 F g−1 at 0.25 A g−1. A sulfur/OMPW (S/OMPW) cathode was fabricated via a simple solution method and a heat-treatment process for lithium/sulfur batteries (LSBs). The S/OMPW composite delivered a large discharge capacity reaching 1601 mAh g−1 at the initial cycle, retaining 1014 mAh g−1 at the 100th cycle at 0.1 C. The great electrochemical performances of the OMPW capacitor electrode and S/OMPW composite were attributed to the large specific surface areas and interconnected mesopores that could supply more active sites for the electrochemical reaction and facilitate mass transfer.

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“…Vapour phase deposition reactions of CVD and ALMD are similar to as both utilises gaseous reagents for nurturing a film [60][61][62][63] . CVD is a single step process.…”

Section: Vapour Coating Of Powdersmentioning

confidence: 99%

“…Fluidised-bed chemical vapour coating: CVD on fluidisedbed of powder is one of most efficient technique to functionalise and to deposit on or coat individual powder particles from gaseous species by combining two processes 63 . One process is deposition itself while other process aims to suspend particles in deposition zone, i.e., most often by upwardly flowing the gas through the powders 63 . In general the method is transport limited.…”

Section: Vapour Coating Of Powdersmentioning

confidence: 99%

Dry-Coating of Powder Particles is Current Trend in Pharmaceutical Field

Alli¹

2021

J. Drug Delivery Ther.

608

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Modification of surface attributes of particles, usually accomplished by coating, is desirous to enhance and maintain their usability. Coating is a multi-step process involves application of the coating material (CoM) onto the substrate, herein powder particles, where the process along with device/ equipment monitors surface attributes of the applied coating. Nowadays competitive market calls for cost cutting to survive product(s). Thus saving of energy and time, minimising number and quantity of additives, reducing and shortening process steps; consequently minimising the coating process cost are main goals while developing coating process for powder particle. Innovation of processes for dry-powder coating (DPC) along with their further development and refinement finds solution to said issues. Further, DPC process does not calls for liquid solvent or solution thus are viewed as cost-effective and environmentally safe, DPC process uses thermo-mechanical methods like mechanofusion, magnetic assisted impaction coating (MAIC), hybridization, rotating fluid-bed process, theta-composer, hot-melt coating (HMC), and many others. Besides these available are non-thermo-mechanical methods namely electrostatic coating; supercritical fluids (SCF) based methods like rapid expansion of supercritical fluid (RESF), gas anti-solvent (GAS), SCF anti-solvent, gas-saturated solution (GSS); vapour coating; and others. Basing on said thermo-mechanical and non-thermo-mechanical principle several DPC methods/ process had been reported in scientific literatures and patents. Said DPC method founds multidisciplinary applications like drug delivery and drug development. Diverse devices are there for the DPC process; their method of working, principle, limitations and benefits along with their applicability in pharmaceutical field are discussed and presented in this article. Keywords: Dry, particle, coating, pharmaceutical, process

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Condensing Vapor Phase Polymerization (CVPP) of Electrochemically Capacitive and Stable Polypyrrole Microtubes

Cited by 25 publications

References 53 publications

Microtubular PEDOT-Coated Bricks for Atmospheric Water Harvesting

Microtubular PEDOT-Coated Bricks for Atmospheric Water Harvesting

Polypyrrole Nanowires with Ordered Large Mesopores: Synthesis, Characterization and Applications in Supercapacitor and Lithium/Sulfur Batteries

Dry-Coating of Powder Particles is Current Trend in Pharmaceutical Field

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