Amino Carbon Nanotube Modified Reduced Graphene Oxide Aerogel for Oil/Water Separation

Cai, Jingyi; Tian, Jing; Gu, Hongbo; Guo, Zhanhu

doi:10.30919/esmm5f611

Cited by 24 publications

(22 citation statements)

References 10 publications

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“…Besides, this strategy can also make the carbon aerogels as smart materials in different fields, such as electromagnetic attenuation materials, dielectric capacitor materials, plasmonic materials, and waveguide materials. [ 20–28 ] When it comes to the application of negative permittivity, different kinds of negative permittivity are preferred. When negative permittivity is used in capacitor (20 Hz–100 kHz), the negative permittivity value should be small enough to match with positive permittivity of dielectric layers, and thus the effective permittivity of capacitor could be obviously enhanced.…”

Section: Resultsmentioning

confidence: 99%

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Xie

Sun

et al. 2021

Adv Elect Materials

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Aerogels with negative parameters have become a research hotspot since the discovery of negative Poisson's ratio and negative thermal expansion coefficient in aerogels. The negative parameters are originally brought up and studied in electromagnetic metamaterials, leaving a question that whether aerogels can be used to construct metamaterials with negative electromagnetic parameters. Here, the authors show that negative permittivity (epsilon‐negative) property can be achieved in carbon aerogels, and its value is adjusted continuously by changing the composition of carbon aerogels but keeping their microstructure unchanged. This is a novel strategy different from the typical array‐structure‐containing metamaterials. Moreover, a physical state transition is found when increasing the carbonization temperature, where the initial low‐loss dielectric state evolves into a high‐loss one upon increasing the temperature from 400 to 700 °C followed by a final degenerate semiconductor state when increasing the temperature to 800 °C and above. This work can provide a new method toward the design of electromagnetic metamaterials, starting by choosing the component materials with optimal composition.

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Section: Resultsmentioning

confidence: 99%

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Xie

Sun

et al. 2021

Adv Elect Materials

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“… 10 Moreover, graphene is expected to become an ideal membrane material to separate gases, liquids and ions in terms of the selectivity and permeability, which could outperform the established polymer membranes. 11 , 12 …”

Section: Introductionmentioning

confidence: 99%

Advances on Graphene-Based Nanomaterials and Mesenchymal Stem Cell-Derived Exosomes Applied in Cutaneous Wound Healing

Zhao

Shi

Cai

et al. 2021

IJN

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Graphene is a new type of carbon nanomaterial discovered after fullerene and carbon nanotube. Due to the excellent biological properties such as biocompatibility, cell proliferation stimulating, and antibacterial properties, graphene and its derivatives have become emerging candidates for the development of novel cutaneous wound dressings and composite scaffolds. On the other hand, pre-clinical research on exosomes derived from mesenchymal stem cells (MSC-Exos) has been intensified for cell-free treatment in wound healing and cutaneous regeneration, via ameliorating the damaged microenvironment of the wound site. Here, we provide a comprehensive understanding of the latest studies and observations on the various effects of graphene-based nanomaterials (GBNs) and MSC-Exos during the cutaneous wound repair process, as well as the putative mechanisms thereof. In addition, we propose the possible forward directions of GBNs and MSC-Exos applications, expecting to promote the clinical transformation.

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“…Recently, GO-based nanocomposites have found various applications in many fields due to its active surface functional groups and unique two-dimensional structure [14]- [16]. Of particular note is that there is a growing interest in the tuning of the material conductivity by GO filler [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Improved Electric Field Distribution Within Bushing Insulation by EP/GO Nanocomposites With Reduced Temperature Coefficient of Conductivity

Sun

Kong

et al. 2020

IEEE Access

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Field grading within the dry-type bushing insulation presents a major challenge for DC applications due to the highly temperature-dependent conductivity of the epoxy resin insulation. An electric field regulation method based on the epoxy/graphene oxide (EP/GO) nanocomposites with the reduced temperature coefficient of conductivity is proposed and investigated in this paper. DC conductivity of EP/GO nanocomposites with different loadings of 0, 0.05, 0.1 and 0.5 wt% at various temperature are investigated. Trap level distributions are characterized by the isothermal discharge current (IDC) method to clarify the conduction mechanism. Obtained results show that more shallower traps are introduced and the thermal activation energies of the nanocomposites are reduced by the GO nanoparticles, indicating that the temperature coefficient of conductivity of the nanocomposites is reduced. The improvement of electric field distribution within the bushing insulation under operating voltage is verified when the EP/GO nanocomposite with an appropriate content is employed, based on an established ±800 kV valve-side bushing for a converter transformer. However, more defects will be introduced by the GO fillers with excessive content (0.5 wt%), resulting in an obvious reduction of the DC breakdown strength. INDEX TERMS Valve-side bushing, electric field regulation, temperature coefficient of conductivity, graphene oxide, epoxy-based nanocomposites.

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Amino Carbon Nanotube Modified Reduced Graphene Oxide Aerogel for Oil/Water Separation

Cited by 24 publications

References 10 publications

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Advances on Graphene-Based Nanomaterials and Mesenchymal Stem Cell-Derived Exosomes Applied in Cutaneous Wound Healing

Improved Electric Field Distribution Within Bushing Insulation by EP/GO Nanocomposites With Reduced Temperature Coefficient of Conductivity

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