Abstract
A better understanding of the bonding and aggregation processes occurring between carbon nanomaterials and metal oxide particles in aqueous solutions is important in the development of novel nanosolids for applications in the areas of sensor development, highly conductive paint, nanotube alignment, polymer composites, Li-ion batteries, and many other areas. The current investigation reviews these processes and presents a detailed description of the aggregation processes occurring between carbon nanomaterials and metal oxide particles (metals) in various aqueous solutions. The results indicate that the charge attraction between the particles results in a strong homogeneous bonding that occurs within the aqueous solution and for the first time demonstrate and describe the aggregation process of these nanoparticles. The relative importance of many parameters that impact the aggregation process is identified and discussed, and guidelines for controlling the aggregation process are presented. This is a simple and cost-effective process to manufacture a novel nano-solid based on carbon nano-material and metal oxide. In addition, the process is easy to scale up and optimize. The methodology could lead to many significant applications as well as commercialization.
Highlights
Carbon nanomaterials and metal oxide nanoparticles have attracted significant consideration for the last two decades because of their attractive mechanical, electrical, and thermophysical properties
The results obtained by Paiva et al [7] showed that Young’s modulus of SWNT/poly(vinyl alcohol) (PVA) composite has improved by 55% when only 5 wt% of functionalized SWNTs has been used to fabricate the composite
The goal of this work is to gain a comprehensive grasp of the bonding and aggregation processes that occur between CNMs and metal-oxide nanoparticles
Summary
Carbon nanomaterials and metal oxide nanoparticles have attracted significant consideration for the last two decades because of their attractive mechanical, electrical, and thermophysical properties. The concomitant rise in viscosity of the fluids results in a poor dispersion because of the use of high weight percentages of CNTs or NPs and is the principal constraint limiting the practical implementation of nanofluids in thermal management applications [15]. A number of different approaches have been pursued; one of the most common is the alignment of CNTs or nanoparticles in aqueous solutions to enhance nanofluids’ TC This approach is only applicable for magnetically sensitive nanomaterials. A new concept for fabricating novel solids based on carbon nanomaterials and metal oxides through aqueous solutions is developed and their use in several important applications is proposed and discussed. The goal of this work is to gain a comprehensive grasp of the bonding and aggregation processes that occur between CNMs and metal-oxide nanoparticles
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