Advanced characterization of by-product carbon film obtained by thermal chemical vapor deposition during CNT manufacturing

Abstract

-This study is focused on the investigation of the morphology and the characteristics of carbon films, obtained by thermal chemical vapor deposition (T-CVD) on different substrates, during carbon nanotubes (CNTs) manufacturing. These films were examined, by means of optical and electronic microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. Additional measurements were conducted related with the estimation of their nanomechanical properties. The topography is studied, in combination with the assessment of their mechanical behavior at nanoscale. Through nanoindentation, hardness and elastic modulus together with wear resistance index (H/E) were evaluated. According to this study, it may be remarked that the obtained film is classified as an amorphous carbon film.

Towards green carbon fibre manufacturing from waste cotton: a microstructural and physical property investigation

“…Towards this, waste cotton fibres are used as a precursor for qualitative and quantitative production of CFs through pyrolysis, an easy and industrially commonly reported method [16][17][18][19] for conversion of waste cotton fibres to CFs. The pyrolysis parameters such as temperature, heating ramp rate, holding time, gas flow rate and preconditioning of the sample are important for carbonaceous materials [18] and CF production considering the endues applications.…”

“…Carbon fibre based industries and researchers express interest in search of the suitable, low-cost, and effective source of precursors to fulfil the industrial demands of CFs [12][13][14][15]; in the last decade, issues concerning environmental pollution and the increasing awareness of limited resources have motivated the scientific community to study and optimize renewable alternatives to traditional petroleumderived plastics, like biobased composite materials that are sourced from carbon-neutral feedstocks [14]. Towards this, waste cotton fibres are used as a precursor for qualitative and quantitative production of CFs through pyrolysis, an easy and industrially commonly reported method [16][17][18][19] for conversion of waste cotton fibres to CFs. The pyrolysis parameters such as temperature, heating ramp rate, holding time, gas flow rate and preconditioning of the sample are important for carbonaceous materials [18] and CF production considering the endues applications.…”

Lubricity Assessment, Wear and Friction of CNT-Based Structures in Nanoscale

“…These deviations in the surface deformation mode influence the quantitative analysis of the contact pressure (as hardness). If piling-up or sinking-in are not considered appropriately during micro-and nanoindentation hardness tests, significant errors may occur when extracting hardness values from the experimental data [31,32]. Creep deformation during nanoindentation testing has an effect on pile-up, which leads to erroneous assessment of the sample properties.…”

Effect of Lignin and CNTs on the properties of melt-spun polymeric fibers

“…The synthesis of MWCNTs was performed according to our previous work [17] via chemical vapor deposition method using a thermal reactor that consists of an horizontal quartz tube housed in a three-zone cylindrical furnace. Briefly, a pyrex flask containing the reagent mixture, which was composed by camphor as carbon precursor and ferrocene as catalyst compound in a 20/1 mass ratio, was connected to the tube nearby the nitrogen inlet.…”