ItemArticle

Effects of Dispersion on Thermal Conductivity and Viscosity in Biomass-Based Nano Systems

Title
Effects of Dispersion on Thermal Conductivity and Viscosity in Biomass-Based Nano Systems
Creator
Bijapur, Kiran; Siddheshwar, Pradeep G.; Bose, Suryasarathi; Hegde, Gurumurthy
Description
Ensuring the long-term stability of nanofluids (NFs) remains a challenge due to nanoparticle aggregation, precipitation, and poor dispersion. Zeta potential (ZP) plays a crucial role in preventing agglomeration and enhancing stability. This study investigates, for the first time, the combined effect of stability and thermal conductivity (TC) enhancement in nanofluids based on biomass-derived carbon nanospheres (CNSs). CNSs synthesized from eight different biowaste sources exhibited ZP values ranging from ?17.0 to ?45.6 mV, influencing dispersion and fluid behavior. These NFs demonstrated exceptional stability for up to 40 days without surfactants and achieved a TC enhancement of up to 111.8%. The research also explores the influence of ZP on TC, dynamic viscosity (V), and thermal diffusivity. The NFs displayed shear-thinning, non-Newtonian behavior, with viscosity values depending on CNS concentration, reaching 0.0000000302 Pas. The effect of pH (312) on stability and TC revealed maximum performance at pH 8, while optimal TC enhancement was achieved at 0.1 wt% CNS concentration. This study bridges the gap between laboratory research and industrial applications, offering sustainable, low-cost, and high-efficiency coolant solutions for the automotive sector. It supports seven Sustainable Development Goals (SDGs) through an innovative waste-to-wealth approach. 2025 Wiley-VCH GmbH.
Source
ChemPlusChem;Volume;90;Issue;8;Article No.;e202500100;
Date
01-01-2025
Publisher
John Wiley and Sons Inc
Subject
biomasses; carbon nanosphere; dispersions; thermal conductivities; viscosity and pH; zeta potential
Coverage
Bijapur K., Department of Chemistry, Christ University, Bengaluru, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Bengaluru, 560029, India; Siddheshwar P.G., Centre for Mathematical Needs, Department of Mathematics, Christ University, Bengaluru, 560029, India; Bose S., Department of Materials Engineering, Indian Institute of Science, Bengaluru, 560012, India; Hegde G., Department of Chemistry, Christ University, Bengaluru, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Bengaluru, 560029, India
Rights
All Open Access; Bronze Open Access
Relation
ISSN: 21926506; CODEN: CHEMM
Format
online
Language
English
Type
Article

Citation

Bijapur, Kiran; Siddheshwar, Pradeep G.; Bose, Suryasarathi; Hegde, Gurumurthy, “Effects of Dispersion on Thermal Conductivity and Viscosity in Biomass-Based Nano Systems,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 17, 2026, https://archives.christuniversity.in/items/show/21764.

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