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Nanomaterials Nanomaterials

Measuring the Thermal Conductivity of Nanomaterials

Nanomaterials offer unique electrical properties, extraordinary strength and great efficiency in heat conduction. Application areas for nanomaterials include electronics, optics, medicine and architecture – offering tremendous potential for ground-breaking discovery. The effective thermal conductivity is often considered a critical performance attribute of the material.

The Modified Transient Plane Source (MTPS) method developed by C-Therm provides the optimal choice for researchers in characterization the thermal conductivity of nanomaterials. Such materials are expensive and time-consuming to produce in the development phase. With the MTPS’ 18mm sensor, researchers are not required to produce the larger volumes of sample material typical for traditional methods. Additionally, the method’s simplicity allows researchers to quickly and easily characterize their samples. There is no need for regression analysis. The single-sided method additionally enables for the thermal mapping of the samples performance in better understanding of the dispersion of nanomaterials in the polymer matrices.

 

  • Single-walled CNT

    Single-walled CNT

  • Multi-walled CNT

    Multi-walled CNT

  • Haydale Composites Solutions Ltd.

    The C-Therm TCi has been a key piece of testing equipment at Haydale, providing fast and accurate thermal conductivity measurements for our product development of nanocomposites. Having this capability has allowed a better understanding of the dispersion of nanomaterials in polymer matrices through thermal mapping sample surfaces. The support and customer service from C-Therm has been excellent over the years, we look forward to dealing with them again in the near future.”

    Stuart Sykes,
    Haydale Composites Solutions Ltd. (Sector: Nanocomposites)

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Case Highlights

Dispersion and Thermal Conductivity of Carbon Nanotube Composites

Recent work, performed by Florida State University and Texas Tech University, leveraged the TCi’s capabilities to help investigate different methods used to shorten carbon nanotubes (CNTs) for improved dispersion with maintained thermal conductivity. Single walled CNT’s were mechanically cut to produce short and open-ended fullerene pipes. A seprate sample set was then acid-oxidized to shorten the CNTs.

Shortened nanotubes were found to improve dispersion into polymer matrices, and resulting in higher thermal conductivity.

Mechanically chopped CNTs performed significantly better than acid oxidized samples, which resulted in degraded CNTs and an overall lower thermal conductivity of the resin composite.

SIMPLIFYING THERMAL CONDUCTIVITY

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