Even if the carbon nanotubes (CNTs) and their derivatives are commonly used as reinforcing phase in composite materials, also in commercial products, their tendency to agglomerate generally determines a scarce dispersion, thus not maximizing the effect due to the second phase. In this article, a perfect dispersion of highly entangled nanotubes was achieved by using a very simple approach: exploiting the dispersing effect of a low-cost polymer, polyvinyl butyral (PVB), coupled with standard ultrasound sonication. Several dispersion approaches were tested in order to develop a consistent and widely applicable dispersion protocol. The tape casting technology was subsequently used to produce 100 to 300 μm thick PVB-matrix composite tapes, reinforced by multiwall CNTs dispersed according to the optimized protocol. Their mechanical properties were evaluated, and a simple model was used to demonstrate that the effective dispersion of CNTs is the key to obtain significantly improved properties.

Lavagna, L., Marchisio, S., Merlo, A., Nistico', R., Pavese, M. (2020). Polyvinyl butyral-based composites with carbon nanotubes: Efficient dispersion as a key to high mechanical properties. POLYMER COMPOSITES, 41(9), 3627-3637 [10.1002/pc.25661].

Polyvinyl butyral-based composites with carbon nanotubes: Efficient dispersion as a key to high mechanical properties

Nistico' R.
Penultimo
;
2020

Abstract

Even if the carbon nanotubes (CNTs) and their derivatives are commonly used as reinforcing phase in composite materials, also in commercial products, their tendency to agglomerate generally determines a scarce dispersion, thus not maximizing the effect due to the second phase. In this article, a perfect dispersion of highly entangled nanotubes was achieved by using a very simple approach: exploiting the dispersing effect of a low-cost polymer, polyvinyl butyral (PVB), coupled with standard ultrasound sonication. Several dispersion approaches were tested in order to develop a consistent and widely applicable dispersion protocol. The tape casting technology was subsequently used to produce 100 to 300 μm thick PVB-matrix composite tapes, reinforced by multiwall CNTs dispersed according to the optimized protocol. Their mechanical properties were evaluated, and a simple model was used to demonstrate that the effective dispersion of CNTs is the key to obtain significantly improved properties.
Articolo in rivista - Articolo scientifico
carbon nanotubes; dispersion; mechanical properties; polymer composite; polyvinyl butyral;
English
3627
3637
11
Lavagna, L., Marchisio, S., Merlo, A., Nistico', R., Pavese, M. (2020). Polyvinyl butyral-based composites with carbon nanotubes: Efficient dispersion as a key to high mechanical properties. POLYMER COMPOSITES, 41(9), 3627-3637 [10.1002/pc.25661].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/349798
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