Healing by the Joule effect of electrically conductive poly(ester-urethane)/carbon nanotube nanocomposites

2016 ◽  
Vol 4 (11) ◽  
pp. 4089-4097 ◽  
Author(s):  
B. Willocq ◽  
R. K. Bose ◽  
F. Khelifa ◽  
S. J. Garcia ◽  
Ph. Dubois ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Self Healing ◽  
Electrically Conductive ◽  
Joule Effect

Recent demands for polymers with autonomous self-healing properties are being constantly raised due to the need for high-performance and reliable materials.

scholarly journals Low-Voltage Icing Protection Film for Automotive and Aeronautical Industries

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1343 ◽  
Author(s):  
Liberata Guadagno ◽  
Fabiana Foglia ◽  
Roberto Pantani ◽  
Maria Dolores Romero-Sanchez ◽  
Blanca Calderón ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Composite Structures ◽  
High Performance ◽  
Low Voltage ◽  
Expanded Graphite ◽  
Operating Conditions ◽  
Motor Vehicles ◽  
Electrically Conductive ◽  
Joule Effect ◽  
Conductive Films

High-performance heater films are here proposed. They manifest great applicative potentiality in the de-icing technology of aircraft and motor vehicles. The films are suitable to be integrated into composite structures for the de/anti-icing function, which can be activated if the need arises. The heating is based on the joule effect of the current flowing through the electrically conductive films. Voltage and current parameters have been set based on the generators’ capacities on-board an aircraft and a car, as well as on the energy consumption during the operating conditions and the autonomy in the time. Green processes have been employed through all preparative steps of the films, which are composed of expanded graphite (60% wt/wt) and polyvinyl alcohol (PVA) (40% wt/wt). The results reveal a very significant influence of the aspect ratio of the filler on the heating and de-icing performance and suggest how to enhance the de-icing efficiency saving energy and adapting the current on-board aircraft/car generators for de-icing operations.

Ultralow percolation threshold and enhanced electromagnetic interference shielding in poly(l-lactide)/multi-walled carbon nanotube nanocomposites with electrically conductive segregated networks

2017 ◽  
Vol 5 (36) ◽  
pp. 9359-9369 ◽  
Author(s):  
Kai Zhang ◽  
Gen-Hui Li ◽  
La-Mei Feng ◽  
Ning Wang ◽  
Jiang Guo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Percolation Threshold ◽  
Electromagnetic Interference ◽  
High Performance ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
Electrically Conductive ◽  
Multi Walled Carbon Nanotube

Segregated PLLA/MWCNTs nanocomposites were synthesized with high-performance EMI shielding.

scholarly journals Electrically conductive and light-weight branched polylactic acid-based carbon nanotube foams

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 96-107
Author(s):  
Wei Liu ◽  
Xian Wu ◽  
Yangjia Ou ◽  
Hao Liu ◽  
Chun Zhang
Keyword(s):  
Carbon Nanotube ◽  
Polylactic Acid ◽  
High Performance ◽  
Foaming Properties ◽  
Light Weight ◽  
Melt Mixing ◽  
Electrically Conductive ◽  
Ring Opening Reaction ◽  
Cost Efficient ◽  
Nucleophilic Ring Opening

Abstract In spite of the high electrical conductivity of carbon nanotube (CNT), its tendency to aggregate and expensive cost in fabricating aerogel, foams, and porous materials remains a problem. Therefore, we described a simple and feasible way to design light-weight, high electrically conductive, and cost-efficient polylactic acid (PLA)/CNT foams. The branched PLA (BPLA) resin with excellent melt elasticity and foamability was induced by nucleophilic ring-opening reaction of epoxy-based acrylic/styrene copolymer and PLA. After that, BPLA/CNT composites and foams were prepared by melt-mixing and supercritical carbon dioxide foaming technology, respectively. The thermal, electrical, and foaming properties were studied. The resultant BPLA/CNT foam possessed a low density of 0.174 g/cm3 and high crystallinity of 3.03%. An improvement of the oriented structure of CNT induced by cell growth in BPLA matrix increased the conductivity of the foam up to 3.51 × 104 Ω/m. The proposed foaming materials provided a way for designing and preparing high performance CNT products.

A review of fundamental principles and applications of polymer nanocomposites filled with both nanoclay and nano-sized carbon allotropes – Graphene and carbon nanotubes

2019 ◽  
Vol 36 (2) ◽  
pp. 209-228 ◽  
Author(s):  
Ayesha Kausar
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Research Field ◽  
Self Healing ◽  
Polymeric Nanocomposites ◽  
Carbon Allotropes ◽  
Characteristic Features ◽  
Primary Focus ◽  
New Processing ◽  
Processing Techniques

Advancements in polymer/nanoclay nanocomposites have supported the development of distinctive preparation strategies and characteristic features. High-performance polymer/nanoclay nanocomposites have applications in aerospace, automotive, construction, environmental, and biomedicine. To further improve polymer/nanoclay nanocomposite performance, nanoclay nanobifillers have been considered. In this regard, nano-sized carbon allotropes are potential contenders to form nanoclay nanobifillers. This article presents a detailed and state-of-the-art review on polymer/nanoclay nanobifiller nanocomposites. The primary focus of this pioneering effort is to deliver an up-to-date overview on polymer/nanoclay nanobifiller nanocomposites along with their categorization, fabrication, properties, and uses. Nanoclay nanobifiller designs using carbon nanotube, graphene, and fullerene are considered. Consequently, ensuing nanocomposite categories are discussed including polymer/nanoclay-carbon nanotube, polymer/nanoclay-graphene, and polymer/nanoclay-fullerene nanocomposites. The dispersion properties and alignment of nanoclay nanobifiller in polymeric nanocomposites have been investigated. Enhancing the interfacial bonding strength between matrix and nanoclay nanobifiller enhances the resulting nanocomposite physical properties. Application areas for polymer/nanoclay nanobifiller nanocomposites include supercapacitors, non-flammable materials, and self-healing materials. The discussion also highlights potential future directions for this emerging research field. Forthcoming advancements in polymer/nanoclay nanobifiller nanocomposites must focus the intensive design control, nanobifiller functionality, new processing techniques, superior dispersion, and enhanced features to further broaden the application prospects of these materials.

scholarly journals Thermally Switchable Electrically Conductive Thermoset rGO/PK Self-Healing Composites

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 339
Author(s):  
Esteban Araya-Hermosilla ◽  
Alice Giannetti ◽  
Guilherme Macedo R. Lima ◽  
Felipe Orozco ◽  
Francesco Picchioni ◽  
...  
Keyword(s):  
Smart Materials ◽  
High Performance ◽  
Polymer Network ◽  
Conductive Polymer ◽  
Alder Reaction ◽  
Diels Alder ◽  
Self Healing ◽  
Stimuli Responsive ◽  
Electrically Conductive ◽  
Suitable Material

Among smart materials, self-healing is one of the most studied properties. A self-healing polymer can repair the cracks that occurred in the structure of the material. Polyketones, which are high-performance thermoplastic polymers, are a suitable material for a self-healing mechanism: a furanic pendant moiety can be introduced into the backbone and used as a diene for a temperature reversible Diels-Alder reaction with bismaleimide. The Diels-Alder adduct is formed at around 50 °C and broken at about 120 °C, giving an intrinsic, stimuli-responsive self-healing material triggered by temperature variations. Also, reduced graphene oxide (rGO) is added to the polymer matrix (1.6–7 wt%), giving a reversible OFF-ON electrically conductive polymer network. Remarkably, the electrical conductivity is activated when reaching temperatures higher than 100 °C, thus suggesting applications as electronic switches based on self-healing soft devices.

HIGH PERFORMANCE MULTI-INSULATOR CARBON NANOTUBE TUNNEL DIODE ARRAYS

2018 ◽  
Author(s):  
Erik C. Anderson ◽  
Thomas L. Bougher ◽  
Baratunde A. Cola
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Tunnel Diode
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