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Biocomposites from ...
Biocomposites from Natural Rubber : Synergistic Effects of Functionalized Cellulose Nanocrystals as Both Reinforcing and Cross-Linking Agents via Free-Radical Thiol-ene Chemistry
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- Kanoth, Bipinbal Parambath (author)
- KTH,Wallenberg Wood Science Center
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- Claudino, Mauro (author)
- KTH,Fiber- och polymerteknologi
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- Johansson, Mats (author)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center
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- Berglund, Lars A. (author)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center
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- Zhou, Qi (author)
- KTH,Glykovetenskap,Wallenberg Wood Science Center,AlbaNova University Centre
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(creator_code:org_t)
- 2015-07-23
- 2015
- English.
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In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 7:30, s. 16303-16310
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Natural rubber/cellulose nanocrystals (NR/CNCs) form true biocomposites from renewable resources and are demonstrated to show significantly improved thermo-mechanical properties and reduced stress-softening. The nanocomposites were prepared from chemically functionalized CNCs bearing thiols. CNCs served as both reinforcing and cross-linking agents in the NR matrix, and the study was designed to prove the cross-linking function of modified CNCs. CNCs were prepared from cotton, and the cross-linkable mercapto-groups were introduced onto the surface of CNCs by esterification. Nanocomposite films were prepared by dispersing the modified CNCs (m-CNCs) in NR matrix by solution casting. The cross-links at the filler matrix (m-CNCs NR) interface were generated by photochemically initiated thiol-ene reactions as monitored by real-time FTIR analysis. The synergistic effects of reinforcement and chemical cross-linking at the m-CNCs NR interface on structure, thermo-mechanical, and stress-softening behavior were investigated. Methods included field emission scanning electron microscopy (FE-SEM), swelling tests, dynamic mechanical analysis, and tensile tests. Compared to biocomposites from NR with unmodified CNCs, the NR/m-CNCs nanocomposites showed 2.4-fold increase in tensile strength, 1.6-fold increase in strain-to-failure, and 2.9-fold increase in work-of-fracture at 10 wt % of m-CNCs in NR.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- cellulose nanocrystals
- natural rubber
- thiol-ene chemistry
- nanocomposites
- interface
- mechanical properties
Publication and Content Type
- ref (subject category)
- art (subject category)
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