Non-Newtonian Thermosensitive Nanofluid Based on Carbon Dots Functionalized with Ionic Liquids

Area of Science:

• Materials Science
• Nanotechnology
• Sustainable Chemistry

Background:

• Non-Newtonian nanofluids offer advanced energy transfer and conductivity.
• Developing sustainable and high-performance nanofluids is crucial for various industrial applications.

Purpose of the Study:

• To synthesize and characterize novel non-Newtonian nanofluids based on carbon dots (Cdots) functionalized with ionic liquids (ILs).
• To explore the potential of these Cdots/IL nanofluids in energy coatings and heat transfer systems.

Main Methods:

• A single-step method was employed for Cdots synthesis using glucose and waste biomass (chitin).
• Ionic liquids, including 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and a novel [Tmi][Trif], were used as reaction media and for ILs functionalization.
• Characterization of nanofluid properties such as conductivity, viscosity, light absorption, wettability, and thermal sensitivity.

Main Results:

• The developed Cdots/IL nanofluids demonstrated high conductivity, viscosity, light absorption, and good wettability.
• An appealing thermal sensitivity behavior was observed, which was maintained in thin films and enhanced by surface plasmon resonance.
• The use of waste biomass and ILs resulted in a cost-effective and sustainable nanofluid synthesis.

Conclusions:

• The novel Cdots/IL-based nanofluids represent a versatile and sustainable material for advanced applications.
• These nanofluids show significant potential for the energy coatings sector and heat transfer film systems due to their unique properties.
• The study highlights a cost-effective route for producing high-performance thermosensitive non-Newtonian nanofluids.