The thermophysical properties and the stability of nanofluids containing carboxyl-functionalized graphene nano-platelets and multi-walled carbon nanotubes

Karami H., Papari-Zare S., Shanbedi M., Eshghi H., Dashtbozorg A., Akbari A., ...Daha Fazla

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, cilt.108, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 108
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.icheatmasstransfer.2019.104302
  • Dergi Adı: INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Nanofluids, Graphene nano-platelets, Carbon nanotubes, Functionalization, Thermophysical properties, Stability, THERMO-PHYSICAL PROPERTIES, BOILING HEAT-TRANSFER, WATER, CONDUCTIVITY, DISPERSION, SURFACE, NANOPARTICLES, GENERATION, ROUGHNESS
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Two structures of carbon-based materials with sp(2)-hybridized are carbon nanotubes and graphene arrayed in the concentric tube and two-dimensional sheet, respectively. The most important problems of graphene and carbon nanotube for use in various applications are insufficient dispersibility and their inadequate stability in different organic and aqueous solvents. The low interaction with other materials is second category problems of carbon nanostructures. Functionalization, a common method suggested by numerous researchers, can be employed to enhance this property. In this regard, the nanofluids containing graphene nanoplatelets and carboxylated multi-walled carbon nanotube were synthesized and dispersed in deionized water to prepare homogeneous samples of 0.1 and 0.2 wt%. The stability dependency of samples was investigated, for the first time, on ultrasonic time and microwave irradiation. Thermophysical properties including shear stress, viscosity, surface tension, density and stability were also measured and reported.