Fabrication of multiwalled carbon nanotubes with polymer shells through surface RAFT polymerization

2007 ◽  
Vol 56 (7) ◽  
pp. 847-852 ◽  
Author(s):  
Guoyong Xu ◽  
Yusong Wang ◽  
Wenmin Pang ◽  
Wei-Tai Wu ◽  
Qingren Zhu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Raft Polymerization ◽  
Multiwalled Carbon ◽  
Polymer Shells

Surface Modification of Multiwalled Carbon Nanotubes with Engineered Self-Assembled RAFT Diblock Coatings

2014 ◽  
Vol 67 (1) ◽  
pp. 151 ◽  
Author(s):  
Yue Liu ◽  
Xiaojuan Hao ◽  
Lynne J. Waddington ◽  
Jieshan Qiu ◽  
Timothy C. Hughes
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Electrostatic Interactions ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Dispersion Stability ◽  
Multiwalled Carbon ◽  
Molecular Weights ◽  
Poly Ethylene ◽  
Positively Charged

A facile method to modify the surface of multiwalled carbon nanotubes (MWCNTs) via electrostatic interactions between polyelectrolytes and oxidized MWCNTs was developed. Diblock copolymers containing poly[2-(methacryloyloxy)ethyltrimethylammonium chloride] (PMETAC), a positively charged block, and poly(ethylene glycol) methacrylate (PEGMA), a neutral block, with tailored molecular weights and low polydispersities were synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization. Acid treated-MWCNTs were coated with the RAFT diblock copolymers to improve their dispersibility in aqueous phosphate buffered saline (PBS) solution. The short positively charged PMETAC block was designed to attach the block copolymers to the surface of MWCNTs via electrostatic interactions, whereas the PEGMA block improved dispersibility of the MWCNTs in aqueous solutions. Extensive screening of the diblock copolymers with different degrees of polymerization (DP) showed that the dispersion stability of the polymer-coated MWCNTs in PBS was greatly improved with increasing chain length of the PEGMA block. In particular, the MWCNTs coated with a diblock copolymer containing PEGMA (DP = 118, the longest block investigated) showed superior dispersion stability in both water and PBS solution.

Matrix-grafted multiwalled carbon nanotubes/poly(methyl methacrylate) nanocomposites synthesized by in situ RAFT polymerization: A kinetic study

2012 ◽  
Vol 44 (8) ◽  
pp. 555-569 ◽  
Author(s):  
Saeid Rahimi-Razin ◽  
Vahid Haddadi-Asl ◽  
Mehdi Salami-Kalajahi ◽  
Farid Behboodi-Sadabad ◽  
Hossein Roghani-Mamaqani
Keyword(s):  
Carbon Nanotubes ◽  
Methyl Methacrylate ◽  
Kinetic Study ◽  
Multiwalled Carbon Nanotubes ◽  
Raft Polymerization ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate

Fabrication of high-k epoxy composites with low dielectric loss based on polymer shell-coated multiwalled carbon nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 53867-53872 ◽  
Author(s):  
Yaotian Su ◽  
Ye Ren ◽  
Guang-Xin Chen ◽  
Qifang Li
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Loss ◽  
Multiwalled Carbon Nanotubes ◽  
Polymer Shell ◽  
Multiwalled Carbon ◽  
Low Dielectric ◽  
High K ◽  
Large Dielectric Loss ◽  
Polymer Shells

A core–shell microstructured hybrid was controllably synthesized by coating cross-linked polymer shells onto multiwalled carbon nanotubes (MWCNTs) via direct in situ free-radical polymerization and was compounded with epoxy to solve the problem of large dielectric loss.

Effect of Multiwalled Carbon Nanotubes On Mechanical Properties of Concrete

2012 ◽  
Vol 2 (6) ◽  
pp. 166-168 ◽  
Author(s):  
Dr.T.Ch.Madhavi Dr.T.Ch.Madhavi ◽  
◽  
Pavithra.P Pavithra.P ◽  
Sushmita Baban Singh Sushmita Baban Singh ◽  
S.B.Vamsi Raj S.B.Vamsi Raj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon
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