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Understanding the D...
Understanding the Dispersive Action of Nanocellulose for Carbon Nanomaterials
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- Hajian, Alireza (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,KTH Royal Institute Technology, Sweden,Department of Fiber Technology, KTH
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- Lindström, Stefan (författare)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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- Pettersson, Torbjörn (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,KTH Royal Institute Technology, Sweden,Department of Fiber Technology, KTH
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- Hamedi, Mahiar M. (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,KTH Royal Institute Technology, Sweden,Department of Fiber Technology, KTH
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- Wågberg, Lars (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,KTH Royal Institute Technology, Sweden,Department of Fiber Technology, KTH
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(creator_code:org_t)
- 2017-02-13
- 2017
- Engelska.
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Ingår i: Nano letters (Print). - : American Chemical Society (ACS). - 1530-6984 .- 1530-6992. ; 17:3, s. 1439-1447
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- This work aims at understanding the excellent ability of nanocelluloses to disperse carbon nanomaterials (CNs) in aqueous media to form long-term stable colloidal dispersions without the need for chemical functionalization of the CNs or the use of surfactant. These dispersions are useful for composites with high CN content when seeking water-based, efficient, and green pathways for their preparation. To establish a comprehensive understanding of such dispersion mechanism, colloidal characterization of the dispersions has been combined with surface adhesion measurements using colloidal probe atomic force microscopy (AFM) in aqueous media. AFM results based on model surfaces of graphene and nanocellulose further suggest that there is an association between the nanocellulose and the CN. This association is caused by fluctuations of the counterions on the surface of the nanocellulose inducing dipoles in the sp2carbon lattice surface of the CNs. Furthermore, the charges on the nanocellulose will induce an electrostatic stabilization of the nanocellulose–CN complexes that prevents aggregation. On the basis of this understanding, nanocelluloses with high surface charge density were used to disperse and stabilize carbon nanotubes (CNTs) and reduced graphene oxide particles in water, so that further increases in the dispersion limit of CNTs could be obtained. The dispersion limit reached the value of 75 wt % CNTs and resulted in high electrical conductivity (515 S/cm) and high modulus (14 GPa) of the CNT composite nanopapers.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- nanocellulose
- carbon nanotubes
- graphene
- interaction
- surface charge
- conductivity
- counterions
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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