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Dynamic Nanocellulo...
Dynamic Nanocellulose Networks for Thermoset-like yet Recyclable Plastics with a High Melt Stiffness and Creep Resistance
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- Peterson, Anna, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.
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- Östergren, Ida, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.
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- Lotsari, Antiope, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.
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- Venkatesh, Abhijit, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Ind & Mat Sci, S-41296 Gothenburg, Sweden.
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- Thunberg, Johannes, 1982 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Ind & Mat Sci, S-41296 Gothenburg, Sweden.
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- Ström, Anna, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.
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- Rojas, Ramiro (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH),Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Martin, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.
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- Berglund, Lars, 1979- (författare)
- KTH,Wallenberg Wood Science Center,Fiber- och polymerteknologi,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH),Chalmers tekniska högskola,Chalmers University of Technology
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- Boldizar, Antal, 1957 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Ind & Mat Sci, S-41296 Gothenburg, Sweden.;Chalmers Univ Technol, Wallenberg Wood Sci Ctr, S-41296 Gothenburg, Sweden.
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- Müller, Christian, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.;Chalmers Univ Technol, Wallenberg Wood Sci Ctr, S-41296 Gothenburg, Sweden.
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Chalmers tekniska högskola Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden (creator_code:org_t)
- 2019-09-17
- 2019
- Engelska.
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Ingår i: Biomacromolecules. - : American Chemical Society (ACS). - 1525-7797 .- 1526-4602. ; 20:10, s. 3924-3932
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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https://research.cha...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Many polymers, including polyethylene, feature a relatively low melting point and hence must be cross-linked to make them viable for applications that demand a high stiffness and creep resistance at elevated temperatures. The resulting thermoset plastics cannot be recycled, and therefore alternative materials with a reconfigurable internal network structure are in high demand. Here, we establish that such a thermoset-like yet recyclable material can be realized through the addition of a nanocellulose reinforcing agent. A network consisting of cellulose nanocrystals, nano- or microfibrils imparts many of the characteristics that are usually achieved through chemical cross-linking. For instance, the addition of only 7.5 wt % of either nanocellulose material significantly enhances the melt stiffness of an otherwise molten ethylene-acrylate copolymer by at least 1 order of magnitude. At the same time, the nanocellulose network reduces the meltcreep elongation to less than 10%, whereas the neat molten matrix would rupture. At high shear rates, however, the molten composites do not display a significantly higher viscosity than the copolymer matrix, and therefore retain the processability of a thermoplastic material. Repeated re-extrusion at 140 °C does not compromise the thermomechanical properties, which indicates a high degree of recyclability. The versatility of dynamic nanocellulose networks is illustrated by 3D printing of a cellulose composite, where the high melt stiffness improves the printability of the resin.
Ämnesord
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
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Peterson, Anna, ...
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Östergren, Ida, ...
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Lotsari, Antiope ...
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Venkatesh, Abhij ...
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Thunberg, Johann ...
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Ström, Anna, 197 ...
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Rojas, Ramiro
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Andersson, Marti ...
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Berglund, Lars, ...
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Boldizar, Antal, ...
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Müller, Christia ...
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