Layer-by-Layer Self-Assembly of Multiwalled Carbon Nanotube Polyelectrolytes Prepared by in Situ Radical Polymerization

Langmuir ◽  
2008 ◽  
Vol 24 (8) ◽  
pp. 3993-3997 ◽  
Author(s):  
Jianfeng Shen ◽  
Yizhe Hu ◽  
Chen Qin ◽  
Mingxin Ye
Keyword(s):  
Carbon Nanotube ◽  
Radical Polymerization ◽  
Self Assembly ◽  
Multiwalled Carbon Nanotube ◽  
Layer By Layer ◽  
Multiwalled Carbon

Double-segregated multiwalled carbon nanotube/silicone composites with large electrical to thermal conductivity ratios via in-situ silicone emulsion polymerization

2020 ◽  
Vol 54 (23) ◽  
pp. 3447-3456
Author(s):  
Dongouk Kim ◽  
Sang-Eui Lee ◽  
Yoonchul Sohn
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Multiwalled Carbon Nanotube ◽  
Layer By Layer ◽  
Multiwalled Carbon ◽  
Water Solvent ◽  
Carbon Nanotube Network ◽  
Silicone Emulsion

Polymer composites with a high electrical conductivity ( σ) to thermal conductivity ( k) ratio have been intensively investigated in recent years. While highly conductive materials, such as metallic fillers or conducting polymers, were used to enhance σ, microstructural engineering was used to decrease k by forming porous structures, such as aerogels or 3D networks. These structures, however, were mechanically vulnerable and could only have limited applications. In this study, multiwalled carbon nanotube /silicone composites with a high σ/k ratio were developed by forming a double-segregated multiwalled carbon nanotube network in the porous body of the composites. The unique microstructure of the composites was created by a novel fabrication process: layer-by-layer deposition with in-situ polymerization of silicone emulsion particles dispersed in a water solvent. This novel process yielded very thick films, >200 µm, with high σ/k values, ∼2 × 104 (S/m)/(W/m·K). These high σ/k composites can be used for various applications, such as resistive heating elements, thermoelectric materials, and wearable thermotherapy.

Buckypaper/DYAD/Buckypaper and Buckypaper/DYAD/ (polyaniline/multiwalled carbon nanotube) composite sensors: Preparation and damping properties characterization

2017 ◽  
Vol 52 (11) ◽  
pp. 1457-1464
Author(s):  
Weiwei Lin ◽  
Yonatan Rotenberg ◽  
Hadi Fekrmandi ◽  
Cesar Levy
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotube ◽  
Damping Ratio ◽  
Multiwalled Carbon Nanotube ◽  
Layer By Layer ◽  
Test Results ◽  
Multiwalled Carbon ◽  
Transmission Electron ◽  
Nanotube Composites ◽  
Matrix Free

Buckypaper/DYAD/Buckypaper and Buckypaper/DYAD/(polyaniline/multiwalled carbon nanotube) composites films were made by frit compression method and layer-by-layer attachment method. Transmission electron microscopy and scanning electron microscopy were used to study the morphology properties of polyaniline/multiwalled carbon nanotube and the results showed that carbon nanotubes were well dispersed in the polymer matrix. Free vibration test results showed that the double-sided attachment of the sensor had higher damping ratio values than single-sided attachment. Also, damping ratios were higher when the composite sensor was placed at the beam's clamped end. Furthermore, the Buckypaper/DYAD/(polyaniline/multiwalled carbon nanotube) combination exhibited higher damping ratios than the other cases tested. Thus, these samples have the potential of being simultaneously strain sensors and dampers.

Fabrication of acrylic acid grafted guar gum-multiwalled carbon nanotube hydrophobic membranes for transdermal drug delivery

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41736-41744 ◽  
Author(s):  
Arindam Giri ◽  
Tridib Bhunia ◽  
Luna Goswami ◽  
Asit Baran Panda ◽  
Abhijit Bandyopadhyay
Keyword(s):  
Carbon Nanotube ◽  
Acrylic Acid ◽  
Guar Gum ◽  
Diclofenac Sodium ◽  
Composite Membranes ◽  
Multiwalled Carbon Nanotube ◽  
Hydrophobic Drug ◽  
Multiwalled Carbon ◽  
Hydrophobic Membranes

Environmentally stable acrylic acid grafted guar gum-carboxy functionalized multiwalled carbon nanotube in situ composite membranes have been developed and characterized for sustained release of a hydrophobic drug, diclofenac sodium.

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