Effect of wet oxidation on the dispersion and electrical properties of multi-walled carbon nanotubes /epoxy nanocomposites

R. Nishata Royan, Abu Bakar Sulong, Hendra Suherman, Jaafar Sahari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Carbon nanotubes (CNTs) have excellent mechanical and electrical properties than conventional materials (carbon black and glass fibers), and are promising candidates as reinforcement material for composites. Formation of electrical conductive with effective dispersion of filler remains a main challenge in the polymer matrix and fillers in order to achieve a good electrical conductivity. Therefore, one of the solutions is to functionalize through wet oxidation of the CNTs besides adding surfactants or assisted liquids. Functionalization of CNTs involves the generation of chemical moieties on their surface that can improve the solubility and processibility. Any functionalization that is undertaken must preferably not influence other key properties such as strength and electrical conductivity of the nano-composite. The matrix used in this study was epoxy and reinforcement filler was multi-walled carbon nanotubes (MWCNTs). MWCNTs were treated with sulfuric acid and nitric acid at 3:1 (v/v) ratio. The present of functional groups on CNTS were investigated using Fourier Transform Infrared (FT-IR). Different weight percentages of MWCNTs (functionalized and as produced) / epoxy composite were prepared. The electrical conductivity of functionalized MWCNTs nanocomposites and as produced MWCNTs nanocomposites were measured by the four point probe. Dispersion state of CNTs in epoxy matrix was observed on fractured surface by scanning electron microscopic. Functionalized CNTs gave better dispersion stability in solvents than non-functionalized CNTs. As expected, non- functionalized CNTs (as produced MWCNTs) are not dispersed at all in all the solvents. However, functionalized CNTs composites give low electrical conductivity. Defects from acid treatment are assumed will damage the original chirality of as produced CNTs and give unbalance polarization on the CNTs, which are the reasons for no formation of conductive pathway networks of acid treated CNTs under electric field.

Original languageEnglish
Title of host publicationKey Engineering Materials
Pages162-166
Number of pages5
Volume471-472
DOIs
Publication statusPublished - 2011
Event8th International Conference on Composite Science and Technology, ICCST8 - Kuala Lumpur
Duration: 22 Mar 201124 Mar 2011

Publication series

NameKey Engineering Materials
Volume471-472
ISSN (Print)10139826

Other

Other8th International Conference on Composite Science and Technology, ICCST8
CityKuala Lumpur
Period22/3/1124/3/11

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Nanocomposites
Electric properties
Oxidation
Fillers
Composite materials
Reinforcement
Soot
Nitric Acid
Acids
Chirality
Nitric acid

Keywords

  • Carbon nanotubes
  • Dispersion
  • Electrical properties
  • Functionalization
  • Nanocomposites

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Royan, R. N., Sulong, A. B., Suherman, H., & Sahari, J. (2011). Effect of wet oxidation on the dispersion and electrical properties of multi-walled carbon nanotubes /epoxy nanocomposites. In Key Engineering Materials (Vol. 471-472, pp. 162-166). (Key Engineering Materials; Vol. 471-472). https://doi.org/10.4028/www.scientific.net/KEM.471-472.162

Effect of wet oxidation on the dispersion and electrical properties of multi-walled carbon nanotubes /epoxy nanocomposites. / Royan, R. Nishata; Sulong, Abu Bakar; Suherman, Hendra; Sahari, Jaafar.

Key Engineering Materials. Vol. 471-472 2011. p. 162-166 (Key Engineering Materials; Vol. 471-472).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Royan, RN, Sulong, AB, Suherman, H & Sahari, J 2011, Effect of wet oxidation on the dispersion and electrical properties of multi-walled carbon nanotubes /epoxy nanocomposites. in Key Engineering Materials. vol. 471-472, Key Engineering Materials, vol. 471-472, pp. 162-166, 8th International Conference on Composite Science and Technology, ICCST8, Kuala Lumpur, 22/3/11. https://doi.org/10.4028/www.scientific.net/KEM.471-472.162
Royan, R. Nishata ; Sulong, Abu Bakar ; Suherman, Hendra ; Sahari, Jaafar. / Effect of wet oxidation on the dispersion and electrical properties of multi-walled carbon nanotubes /epoxy nanocomposites. Key Engineering Materials. Vol. 471-472 2011. pp. 162-166 (Key Engineering Materials).
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