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Biocomposites from ...
Biocomposites from Rice Straw Nanofibers: Morphology, Thermal and Mechanical Properties
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- Carlos Alcantara, Jose (författare)
- Universitat de Girona,University of Girona,Univ Girona, Dept Chem Engn, Polytech Sch, Adv Biomat & Nanotechnol, Girona 17003, Spain.
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- Gonzalez, Israel (författare)
- Universitat de Girona,University of Girona,Univ Girona, Dept Chem Engn, LEPAMAP Grp, Girona 17003, Spain.
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- Merce Pareta, M. (författare)
- Universitat de Girona,University of Girona,Polytech Univ Girona, Dept Architecture & Construct, Girona 17003, Spain.
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- Vilaseca, Fabiola (författare)
- KTH,Fiber- och polymerteknologi,Univ Girona, Dept Chem Engn, Polytech Sch, Adv Biomat & Nanotechnol, Girona 17003, Spain.;Chalmers Univ Technol, Dept Ind & Mat Sci, Engn Mat, SE-41296 Gothenburg, Sweden.,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH),Chalmers tekniska högskola,Chalmers University of Technology,Universitat de Girona,University of Girona
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Universitat de Girona Univ Girona, Dept Chem Engn, Polytech Sch, Adv Biomat & Nanotechnol, Girona 17003, Spain (creator_code:org_t)
- 2020-05-05
- 2020
- Engelska.
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Ingår i: Materials. - : MDPI AG. - 1996-1944. ; 13:9
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Agricultural residues are major potential resources for biomass and for material production. In this work, rice straw residues were used to isolate cellulose nanofibers of different degree of oxidation. Firstly, bleached rice fibers were produced from the rice straw residues following chemical extraction and bleaching processes. Oxidation of rice fibers mediated by radical 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) at pH 10 was then applied to extract rice cellulose nanofibers, with diameters of 3-11 nm from morphological analysis. The strengthening capacity of rice nanofibers was tested by casting nanocomposite films with poly(vinyl alcohol) polymer. The same formulations with eucalyptus nanofibers were produced as comparison. Their thermal and mechanical performance was evaluated using thermogravimetry, differential scanning calorimetry, dynamic mechanical analysis and tensile testing. The glass transition of nanocomposites was shifted to higher temperatures with respect to the pure polymer by the addition of rice cellulose nanofibers. Rice nanofibers also acted as a nucleating agent for the polymer matrix. More flexible eucalyptus nanofibers did not show these two phenomena on the matrix. Instead, both types of nanofibers gave similar stiffening (as Young's modulus) to the matrix reinforced up to 5 wt.%. The ultimate tensile strength of nanocomposite films revealed significant enhancing capacity for rice nanofibers, although this effect was somehow higher for eucalyptus nanofibers.
Ämnesord
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- rice nanofibers
- thermal properties
- biocomposites
- mechanical properties
- casting
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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