Pyrograf III Carbon Nanofibers: Properties and Applications of Type PR-19 Nanofibers

Table of Contents

Introduction
PR-19-XT-PS Data Sheet
     Product nomenclature
PR-19-XT-LHT Data Sheet
     Product Nomenclature
PR-19-XT-HHT Data Sheet
     Product Nomenclature
About Pyrograf

Introduction

Pyrograf-III is a very fine, patented, inexpensive, highly graphitic carbon nanofiber. Pyrograf-III is offered in two fiber types having diameters ranging between 70 and 200 nm and length of the as-produced fiber is 50 – 200 µm. Nanofibers are much smaller in diameter when compared to conventional milled or continuous carbon fibers but definitely larger than carbon nanotubes, which lie between 1 and 10 nm.

Figure 1 shows that PR-19 has an average diameter of 150 nm, chemically vapor deposited carbon layer on the fiber surface over a catalytic layer as shown in Figure 1. Since the fibers are obtained in a vapor phase they get entwined during growth resulting in a mesh-like configuration. Debulking of this raw form is then done to offer the customer a uniform bulk density product enabling precise compounding into the final product. Pyrograf-III is presently offered in a debulked form termed as XT. This form has a bulk density of 1-3 lb/ft3.

Figure 1. Transmission electrom micrograph showing catalytic layer

PR-19-XT-PS Data Sheet

Product nomenclature

PR-19 has an average diameter of about 150 nm and has a chemically vapor deposited (CVD) layer of carbon on the fiber surface over a graphitic tubular core fiber. It is available in three grades designated as PS, LHT and HHT. The PS grade carbon nanofiber is obtained by pyrolytically stripping the as- produced fiber to remove polyaromatic hydrocarbons from the fiber surface.

Table 1. Carbon nanofiber properties

Fiber diameter, nm (average): 150
CVD carbon overcoat present on fiber: yes
Surface area, m2/gm: 20-30
Dispersive surface energy, mJ/m2: 120-140
Moisture, wt%: <5
Iron, ppm: <14,000
Polyaromatic hydrocarbons, mg PAH/gm fiber: <1

PR-19 XT-PS finds applications in mechanical, and electrical (for ESD applications)

PR-19-XT-LHT Data Sheet

Product Nomenclature

Heat treatment of the fiber at 1500°C helps obtain the LHT grade. By this, any chemically vapor deposited carbon present on the fiber surface is converted to a short-range ordered structure. There is an increase in the fiber’s inherent conductivity.

Table 2. Carbon nanofiber properties

Fiber diameter, nm (average): 150
CVD carbon overcoat present on fiber: no
Surface area, m2/gm: 20-30
Dispersive surface energy, mJ/m2: 120-140
Moisture, wt%: <5
Iron, ppm: <14,000
Polyaromatic hydrocarbons, mg PAH/gm fiber: <1

PR-19 XT-LHT finds applications in mechanical, and electrical fields.

PR-19-XT-HHT Data Sheet

Product Nomenclature

Heat-treatment of the as-produced carbon nanofiber to 3000°C produces the HHT grade. The fiber is thus converted to a fully graphitized form and creates a highly conductive carbon nanofiber. The iron content that is the catalyst is also reduced to very low levels.

Table 3. Carbon nanofiber properties

Fiber diameter, nm (average): 150
CVD carbon overcoat present on fiber: no
Surface area, m2/gm: 15-25
Dispersive surface energy, mJ/m2: 265-285
Moisture, wt%: <5
Iron, ppm: <100
Polyaromatic hydrocarbons, mg PAH/gm fiber: <1

PR-19 finds applications in Electrical, Thermal, and Electronic Devices.

About Pyrograf

Pyrograf Products, Inc. (PPI) is one of the leading producers of carbon nanofibers worldwide.

Pyrograf Products focuses on manufacturing high- quality, low-cost carbon nanofibers utilizing the proprietary and patented vapor grown carbon fiber (VGCF) process. Pyrograf-III, developed Applied Sciences, Inc. (ASI), is a versatile vapor grown carbon nanofiber with a wide range of applications.

This information has been sourced, reviewed and adapted from materials provided by Pyrograf.

For more information on this source, please visit Pyrograf.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Pyrograf Products Inc.. (2017, July 31). Pyrograf III Carbon Nanofibers: Properties and Applications of Type PR-19 Nanofibers. AZoNano. Retrieved on August 20, 2019 from https://www.azonano.com/article.aspx?ArticleID=3074.

  • MLA

    Pyrograf Products Inc.. "Pyrograf III Carbon Nanofibers: Properties and Applications of Type PR-19 Nanofibers". AZoNano. 20 August 2019. <https://www.azonano.com/article.aspx?ArticleID=3074>.

  • Chicago

    Pyrograf Products Inc.. "Pyrograf III Carbon Nanofibers: Properties and Applications of Type PR-19 Nanofibers". AZoNano. https://www.azonano.com/article.aspx?ArticleID=3074. (accessed August 20, 2019).

  • Harvard

    Pyrograf Products Inc.. 2017. Pyrograf III Carbon Nanofibers: Properties and Applications of Type PR-19 Nanofibers. AZoNano, viewed 20 August 2019, https://www.azonano.com/article.aspx?ArticleID=3074.

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback
Submit