Conductive composite fibres from reduced graphene oxide and polypyrrole nanoparticles

Schirmer, Katharina; Esrafilzadeh, Dorna; Thompson, Brianna C.; Quigley, Anita; Kapsa, Robert M. I.; Wallace, Gordon G.

doi:10.1039/c5tb02130h

Cited by 35 publications

(27 citation statements)

References 67 publications

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“…The aspect ratio ( D / t ) of LCGO sheets was estimated by dividing the average lateral size of the sheets ( D ) from SEM to the average sheet thickness ( t ) from atomic force microscope (AFM). Such exceptionally high aspect ratio ( D / t in the range of 50 000) and flexibility of ultra‐large sheets of LCGO provides a unique environment for matrix‐guided molecular level self‐assembly of nanomaterials . Ultra‐large giant LCGO sheets were formed in the dispersion from exfoliated thermally expanded graphite (EG) ( Figure a).…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS₂‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Chao

Jalili

et al. 2017

Adv Funct Materials

182

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Flexible freestanding electrodes are highly desired to realize wearable/flexible batteries as required for the design and production of flexible electronic devices. Here, the excellent electrochemical performance and inherent flexibility of atomically thin 2D MoS 2 along with the self-assembly properties of liquid crystalline graphene oxide (LCGO) dispersion are exploited to fabricate a porous anode for high-performance lithium ion batteries. Flexible, free-standing MoS 2 -reduced graphene oxide (MG) film with a 3D porous structure is fabricated via a facile spontaneous self-assembly process and subsequent freeze-drying. This is the first report of a one-pot self-assembly, gelation, and subsequent reduction of MoS 2 /LCGO composite to form a flexible, high performance electrode for charge storage. The gelation process occurs directly in the mixed dispersion of MoS 2 and LCGO nanosheets at a low temperature (70 °C) and normal atmosphere (1 atm). The MG film with 75 wt% of MoS 2 exhibits a high reversible capacity of 800 mAh g −1 at a current density of 100 mA g −1 . It also demonstrates excellent rate capability, and excellent cycling stability with no capacity drop over 500 charge/discharge cycles at a current density of 400 mA g −1 .

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Section: Resultsmentioning

confidence: 99%

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS₂‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Chao

Jalili

et al. 2017

Adv Funct Materials

182

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“…rGO-PPy composite fibres were produced by using a rotational wet-spinning approach as described in Schirmer et al [30]. The spinning solutions were prepared by adding PPy nanoparticles to graphene oxide dispersed in water at a weight ratio of 80% graphene and 20% PPy particles.…”

Section: Methodsmentioning

confidence: 99%

Cell compatible encapsulation of filaments into 3D hydrogels

Schirmer¹,

Gorkin²,

Beirne³

et al. 2016

Biofabrication

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Tissue engineering scaffolds for nerve regeneration, or artificial nerve conduits, are particularly challenging due to the high level of complexity the structure of the nerve presents. The list of requirements for artificial nerve conduits is long and includes the ability to physically guide nerve growth using physical and chemical cues as well as electrical stimulation. Combining these characteristics into a conduit, while maintaining biocompatibility and biodegradability, has not been satisfactorily achieved by currently employed fabrication techniques. Here we present a method combining pultrusion and wet-spinning techniques facilitating incorporation of pre-formed filaments into ionically crosslinkable hydrogels. This new biofabrication technique allows the incorporation of conducting or drug-laden filaments, controlled guidance channels and living cells into hydrogels, creating new improved conduit designs.

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“…One such polymer is polypyrrole (PPy); PPy and its composites have attracted interest owing to their intrinsic conductivity, low toxicity, and good biocompatibility. Therefore, they enable biomedical applications involving the electrical stimulation of cells and tissues . Furthermore, PPy is considered very promising for applications such as the regeneration of nerves and spinal cord tissues.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Polymeric Microfibers of PLGA and PLGA/PPy Composite Fabricated by Solution Blow Spinning

Nahuis

Valente

Oliveira

et al. 2019

Macromolecular Symposia

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In this study, microfibers of poly(L‐lactic‐co‐glycolic acid) (PLGA) and PLGA/polypyrrole (PPy) composite (90/10 wt%) are produced by using the solution blow spinning (SBS) technique. PPy is synthesized by the oxidative polymerization method using p‐toluenesulfonic acid (p‐TSA) as the dopant and FeCl3 as the oxidant. The prepared PPy showed microfibers with globular particles morphology. Mixtures of porous and nonporous microfibers and microfibers incorporated with PPy are obtained. A wettability test shows that the PLGA and PLGA/PPy fibrous mats are hydrophobic. The electrical conductivity of the PLGA/PPy composite is of the same order as that of pure PLGA (≈10−10 S cm−1), indicating that the electrical percolation threshold is not reached for PPy loading of 10 wt%. The incorporation of PPy into PLGA microfibers improved the thermal stability of the composite and also increases the PLGA crystalline phase.

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Conductive composite fibres from reduced graphene oxide and polypyrrole nanoparticles

Abstract: Wet–spun composite fibres from graphene and polypyrrole nanoparticles show appropriate mechanical properties, high electrical conductivity and good cytocompatibility.

Cited by 35 publications

References 67 publications

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS₂‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS₂‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Cell compatible encapsulation of filaments into 3D hydrogels

Preparation and Characterization of Polymeric Microfibers of PLGA and PLGA/PPy Composite Fabricated by Solution Blow Spinning

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Conductive composite fibres from reduced graphene oxide and polypyrrole nanoparticles

Abstract: Wet–spun composite fibres from graphene and polypyrrole nanoparticles show appropriate mechanical properties, high electrical conductivity and good cytocompatibility.

Cited by 35 publications

References 67 publications

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS2‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS2‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Cell compatible encapsulation of filaments into 3D hydrogels

Preparation and Characterization of Polymeric Microfibers of PLGA and PLGA/PPy Composite Fabricated by Solution Blow Spinning

Contact Info

Product

Resources

About

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS₂‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries

Self‐Assembly of Flexible Free‐Standing 3D Porous MoS₂‐Reduced Graphene Oxide Structure for High‐Performance Lithium‐Ion Batteries