Estimating Nanoscale Surface Roughness of Polyethylene Terephthalate Fibers

Románszki, Loránd; Klébert, Szilvia; Héberger, Károly

doi:10.1021/acsomega.9b04211

Cited by 12 publications

(6 citation statements)

References 41 publications

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“…Considering that surface roughness is a scale-dependent value, simple assessments of carbon fiber surface roughness are impossible. The effects of grooves, tip convolution, and scanning conditions all affect surface roughness evaluations that are not representative of the true fiber characteristics. , Surface roughness evaluations like R a are one-dimensional and incur more bias error in surface roughness estimations due to processing bias and line-by-line calculations . PSD in comparison offers holistic analysis of the AFM data.…”

Section: Results and Discussionmentioning

confidence: 99%

Carbon Fiber Surface Functional Landscapes: Nanoscale Topography and Property Distribution

Adstedt

Stojcevski

Newman

et al. 2022

ACS Appl. Mater. Interfaces

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The ultimate properties of carbon fibers and their composites are largely dictated by the surface topography of the fibers and the interface characteristics, which are primarily influenced by the surface distribution of chemical functionalities and their interactions with the matrix resin. Nevertheless, nanoscale insights on the carbon fiber surface in relationship with its chemical modification are still rarely addressed. Here, we demonstrate a critical insight on the nanoscale surface topography characterization of modified novel carbon fibers using high-resolution atomic force microscopy at multiple length scales. We compare the nanoscale surface characteristics relevant to their role in controlling interfacial interactions for carbon fibers manufactured at two different tensions and two distinct chemically functionalized coatings. We used surface dimple (also known as nanopores) profiling, microroughness analysis, power spectral density analysis, and adhesion and electrostatic potential mapping to reveal the fine details of surface characteristics at different length scales. This analysis demonstrates that the carbon fibers processed at lower tension possess a higher fractal dimension with a more corrugated surface and higher surface roughness, which leads to increased surface adhesion and energy dissipation across nano- and microscales. Furthermore, electrochemical surface modification with amine- and fluoro-functional groups significantly masks the microroughness inherent to these fibers. This results in increased fractal dimension and decreased energy dissipation and adhesion due to the high chemical reactivity in the areas of asperities and surface defects combined with a significant increase in the surface potential, as revealed by Kelvin probe mapping. These local surface properties of carbon fibers are crucial for designing next-generation fiber composites with predictable interfacial strength and the overall mechanical performance by considering the fiber surface topography for proper control of interphase formation.

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Section: Results and Discussionmentioning

confidence: 99%

Carbon Fiber Surface Functional Landscapes: Nanoscale Topography and Property Distribution

Adstedt

Stojcevski

Newman

et al. 2022

ACS Appl. Mater. Interfaces

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“…30 During the plasma treatment, several energetic particles (positive ions, electrons, neutral gas atoms or molecules, and UV light) physically and If on one hand contaminants at the surface are removed and the surface cleaned, on the other hand, groups of atoms or small molecules are etched or eliminated from the surface, together with some radicals that are formed due to the impact of those energetic particles, both creating microdefects, which are then responsible to form rougher and activated surfaces. [31][32][33] In the case of EDA_E2050_30_Braid samples (Figures 4d-f), the morphology of the composing filaments becomes completely different.…”

Section: Sem Analysismentioning

confidence: 98%

Bioactive and biopassive treatment of poly(ethylene terephthalate) multifilament textile yarns to improve/prevent fibroblast viability

et al. 2021

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To modulate the physicochemical features of poly(ethylene terephthalate) (PET) multifilaments surface composing a complex textile structure (core and shell system), intended to improve upon current implants for high extension injuries of the Achilles tendon or even for its total replacement, two surface treatments with different purposes (bioactive and biopassive) were studied. The first treatment is based on amino groups grafting using ethylenediamine molecules to be applied in the structure core to improve cell adhesion and proliferation. The other treatment relates to a polytetrafluoroethylene (PTFE) coating to be applied in the structure shell to decrease its coefficient of friction and avoid adhesions. Both treatments were optimized to reach their purposed goals without harming the tensile properties of PET yarns, which were evaluated by static tensile tests. The resazurin assay and scanning electron microscopy analysis showed that the purposed goals related to fibroblast adhesion were achieved for both treatments and in the case of PTFE coating, the abrasion resistance was also improved according to the yarn-on-yarn abrasion tests.

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“…Morphological changes usually result in increased roughness sometimes in the nanometer scale and it may not be visible on regular SEM micrographs. It can be revealed only at higher magnification or with other microscope techniques, based on different principle [129]. It is also worth noting that when treated with a polymerizing gas, the layer formed tends to mask the irregularities on the surface, so in this case the surface roughness reduced indeed.…”

Section: Morphological Changes-microscopically Visible Changesmentioning

confidence: 99%

Can Plasma Surface Treatment Replace Traditional Wood Modification Methods?

2022

Self Cite

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Wood modification is an excellent and increasingly used method to expand the application of woody materials. Traditional methods, such as chemical or thermal, have been developed for the targeted improvement of some selected properties, unfortunately typically at the expense of others. These methods generally alter the composition of wood, and thus its mechanical properties, and enhance dimensional stability, water resistance, or decrease its susceptibility to microorganisms. Although conventional methods achieve the desired properties, they require a lot of energy and chemicals, therefore research is increasingly moving towards more environmentally friendly processes. The advantage of modern methods is that in most cases, they only modify the surface and do not affect the structure and mechanical properties of the wood, while reducing the amount of chemicals used. Cold plasma surface treatment is one of the cheapest and easiest technologies with a limited burden on the environment. In this review, we focus on cold plasma treatment, the interaction between plasma and wood compounds, the advantages of plasma treatment compared to traditional methods, and perspectives.

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Estimating Nanoscale Surface Roughness of Polyethylene Terephthalate Fibers

Cited by 12 publications

References 41 publications

Carbon Fiber Surface Functional Landscapes: Nanoscale Topography and Property Distribution

Carbon Fiber Surface Functional Landscapes: Nanoscale Topography and Property Distribution

Bioactive and biopassive treatment of poly(ethylene terephthalate) multifilament textile yarns to improve/prevent fibroblast viability

Can Plasma Surface Treatment Replace Traditional Wood Modification Methods?

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