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Cellulose nanocompo...
Cellulose nanocomposites - Controlling dispersion and material properties through nanocellulose surface modification
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- Ansari, Farhan (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center
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- Salajkova, Michaela (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center
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- Zhou, Qi (författare)
- KTH,Skolan för bioteknologi (BIO),Wallenberg Wood Science Center
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visa fler...
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- Berglund, Lars, 1979- (författare)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center
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visa färre...
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(creator_code:org_t)
- International Committee on Composite Materials, 2015
- 2015
- Engelska.
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Ingår i: 20th International Conference on Composite Materials, ICCM 2015. - : International Committee on Composite Materials.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- The use of cellulosic nanofibers as reinforcement in polymer composites offers great advantages over their petroleum counterparts. Apart from being strong, stiff and low density; they are obtained from naturally occurring resources and as such are favorable from an environmental point of view. A major problem while studying nanomaterials is their tendency to agglomerate, thus leading to inhomogeneous distribution within the polymer matrix. This often results in stress concentrations in the matrix rich regions when the material is subjected to load and therefore, limits the potential application of these materials. A common approach to circumvent this is by surface modification, which facilitates the dispersion in non-polar matrices. An environmental friendly approach, inspired by clay chemistry, was used to functionalize the CNC surface. It was shown that the CNC could be modified in a rather convenient way to attach a variety of functional groups on the surface. Primarily, the problem of cellulose nanocrystal (CNC) distribution in a hydrophobic polymer matrix is investigated. Composites prepared from modified CNC were studied and compared with unmodified CNC. The distribution of the CNC is carefully monitored at different stages via UV-Vis spectroscopy and scanning electron microscopy (SEM). The mechanical properties of the resulting materials were characterized by dynamic mechanical as well as uniaxial tensile tests. It was shown that a homogeneous distribution of the CNC exposes a tremendous amount of surface area to interact with the matrix. In such a case, the stress transfer is much more efficient and perhaps, the matrix behavior is modified, which leads to significant improvements in the mechanical properties.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- Cellulose Nanocomposites
- Mechanical Performance
- Surface modification
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)