BIBLIOS

Document type
Conference papers

Document subtype
Abstract

Title
IoNanofluids From Graphene. The Right Approach?

Participants in the publication
Salomé I. C. Vieira (Author)
Dep. Química e Bioquímica
Francisco E. B. Bioucas (Author)
CQE
Kristiina Kreek (Author)
Ângela Lamas (Author)
Maria José V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
Fernando J. V. Santos (Author)
Dep. Química e Bioquímica
CQE
Xavier Paredes (Author)
Dep. Química e Bioquímica
CQE
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Mikhel Koel (Author)

Summary
The research on nanofluids raised several problems about the characterization of nanomaterials used, preparation and short/long term stability of the prepared dispersions, and the adequacy of the experimental techniques used to measure the thermophysical properties, namely thermal conductivity, due to the scatter of published data. These problems are aggravated with IoNanofluids, because the structure of the base liquids, the ionic liquids (IL’s), is by far more complex than the common molecular solvents like water, glycols, and also because their interactions with nanomaterials are more complex, due to specific interactions between the ions and the nanoparticles [1].\nIt is the purpose of this paper to report on a systematic study of IoNanofluids of one very well characterized nano-graphene (NG), in several ionic liquids ([C2mim][N(CN)2], [C2mim][SCN], [C2mim][CH3SO3], [C2mim][C(CN)3]) and [C12mim][N(CN)2]), by using the same method of preparation, and stability assessment. Graphene was obtained from Sky Spring Nanomaterials Inc. USA (Product #041DX), with thickness (6-8 nm) and average particle diameter of 15 μm.\nThe nanomaterial particle dimensions were characterized by TEM imagining. Measurements of thermal conductivity were performed with a thermal conductivity meter, Hukseflux model (TPSYS02), with probe TP08. A special thermostated cell was constructed, and temperature was controlled within 0.1
C. The instrument quality was tested with water (MilliporeR ) between room temperature and 70 ºC. Deviations from the IUPAC standard reference correlation of Ramires et al [2] (accuracy 0.5 %) where found smaller than 1.5 %. The estimated uncertainty of the data herein presented is assumed to be 2 %. The results show that good and coherent experimental results can be obtained when well planned experiments are used, demonstrating that IoNanofluids can be used in many applications\nwith success.

Editor(s)
Gernot Potlacher


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Event
21th European Conference on Thermophysical Properties, ECTP2017, September 3-8, 2017

Publication Identifiers
ISBN - 9783851255461

Address
Graz, Austria

Organizers
Institute of Experimental Physics, TU Graz

Publisher
TU-Graz

Collection
Abstract Book



Document Identifiers
DOI - https://doi.org/10.3217/978-3-85125-546-1

Keywords
Ionanofluids Graphene Ionic Liquids Stability