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Open AccessArticle

Stacked-Cup Carbon Nanotube Flexible Paper Based on Soy Lecithin and Natural Rubber

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Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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Dipartimento di Informatica Bioingegneria, Robotica e Ingegneria dei Sistemi (DIBRIS), Universita Degli Studi di Genova, Via All’Opera Pia 13, 16145 Genova, Italy
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GEA Mechanical Equipment Italia S.p.A., Via da Erba Edoari Mario, 29, 43123 Parma, Italy
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(6), 824; https://doi.org/10.3390/nano9060824
Received: 6 May 2019 / Revised: 24 May 2019 / Accepted: 28 May 2019 / Published: 31 May 2019
(This article belongs to the Special Issue Engineering Bionanocomposites for Functional Applications)
Stacked-cup carbon nanotubes (SCCNTs) are generally referred to as carbon nanofibers (CNFs). SCCNTs are much less expensive to fabricate and are regarded as good polymer modifiers suitable for large-scale production. Flexible, SCCNT-based soy lecithin biocomposites were fabricated using liquid natural rubber latex as binder. Natural polymers and the SCCNTs were dispersed in a green solvent using a benchtop high-pressure homogenizer. The inks were simply brush-on painted onto cellulose fiber networks and compacted by a hydraulic press so as to transform into conductive paper-like form. The resulting flexible SCCNT papers demonstrated excellent resistance against severe folding and bending tests, with volume resistivity of about 85 Ω·cm at 20 wt % SCCNT loading. The solvent enabled formation of hydrogen bonding between natural rubber and soy lecithin. Thermomechanical measurements indicated that the biocomposites have good stability below and above glass transition points. Moreover, the SCCNT biocomposites had high through-plane thermal conductivity of 5 W/mK and 2000 kJ/m3K volumetric heat capacity, ideal for thermal interface heat transfer applications. View Full-Text
Keywords: soy lecithin; carbon nanotubes; carbon nanofibers; natural rubber; biocomposites; conductive paper; thermal conductivity soy lecithin; carbon nanotubes; carbon nanofibers; natural rubber; biocomposites; conductive paper; thermal conductivity
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Shayganpour, A.; Naderizadeh, S.; Grasselli, S.; Malchiodi, A.; Bayer, I.S. Stacked-Cup Carbon Nanotube Flexible Paper Based on Soy Lecithin and Natural Rubber. Nanomaterials 2019, 9, 824.

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