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Colloid and Polymer Science

, Volume 295, Issue 9, pp 1575–1583 | Cite as

Influence of temperature and particle concentration on the pH of complex nanocolloids

  • Ajay KatiyarEmail author
  • A. R. Harikrishnan
  • Purbarun DharEmail author
Original Contribution

Abstract

The pH of colloids is an important electrokinetic property which determines phase stability. We report the effect of temperature and nanoparticle concentration on pH of different nanocolloids of nanomaterials of varied morphologies and sizes. Measurements over a temperature range show that the pH of nanocolloids is a strong function of temperature and the concentration of the dispersed phase. Charge transport mechanisms leading to changes in the effective proton population are discussed. The mannerism in which the electric double layer (EDL) at the particle-fluid interface affects the pH of nanocolloids is presented by appealing to the DLVO theory of electrokinetics dispersion.

Keywords

Nanofluids pH Temperature Concentration Electric double layer DLVO theory 

Notes

Acknowledgements

The authors are thankful to the Sophisticated Analytical Instruments Facility (SAIF), IIT Madras for material characterizations. AK is also thankful to the Director, Research and Innovation Centre (DRDO), Chennai, for giving permission to publish the present work. ARH would like to thank MHRD, Govt. of India, for his doctoral scholarship. Authors acknowledge the Defence Research and Development Organization (DRDO) of India for funding of the present work (Grant no. ERIP/ER/RIC/2013/M/01/2194/D (R&D)).

Compliance with ethical standards

Conflict of interest statement

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Research and Innovation Centre (DRDO)IIT Madras Research ParkChennaiIndia
  2. 2.Department of Mechanical EngineeringIndian Institute of Technology MadrasChennaiIndia
  3. 3.Department of Mechanical EngineeringIndian Institute of Technology RoparRupnagarIndia

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