Melt-compounded nanocomposites of titanium dioxide atomic-layer-deposition-coated polyamide and polystyrene powders

Katja Nevalainen, Nora Isomäki, Mari Honkanen, Reija Suihkonen, Tony McNally, Eileen Harkin-Jones, Seppo Syrjälä, Jyrki Vuorinen, Pentti Järvelä

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Polyamide and polystyrene particles were coated with titanium dioxide films by atomic layer deposition (ALD) and then melt-compounded to form polymer nanocomposites. The rheological properties of the ALD-created nanocomposite materials were characterized with a melt flow indexer, a melt flow spiral mould, and a rotational rheometer. The results suggest that the melt flow properties of polyamide nanocomposites were markedly better than those of pure polyamide and polystyrene nanocomposites. Such behavior was shown to originate in an uncontrollable decrease in the polyamide molecular weight, likely affected by a high thin-film impurity content, as shown in gel permeation chromatography (GPC) and scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer. Transmission electron microscope image showed that a thin film grew on both studied polymer particles, and that subsequent melt-compounding was successful, producing well dispersed ribbon-like titanium dioxide with the titanium dioxide filler content ranging from 0.06 to 1.12wt%. Even though we used nanofillers with a high aspect ratio, they had only a minor effect on the tensile and flexural properties of the polystyrene nanocomposites. The mechanical behavior of polyamide nanocomposites was more complex because of the molecular weight degradation. Our approach here to form polymeric nanocomposites is one way to tailor ceramic nanofillers and form homogenous polymer nanocomposites with minimal work-related risks in handling powder form nanofillers. However, further research is needed to gauge the commercial potential of ALD-created nanocomposite materials.

LanguageEnglish
Pages357-366
Number of pages10
JournalPolymers for Advanced Technologies
Volume23
Issue number3
DOIs
Publication statusPublished - 1 Mar 2012

Fingerprint

Atomic layer deposition
Polystyrenes
Nylons
Polyamides
Powders
Titanium dioxide
Nanocomposites
Polymers
Electron microscopes
Molecular weight
titanium dioxide
Thin films
Rheometers
Gel permeation chromatography
Gages
Spectrometers
Fillers
Aspect ratio
Impurities
Scanning

Keywords

  • Atomic layer deposition
  • Nanocomposite
  • Polyamide
  • Polystyrene
  • Titanium dioxide

Cite this

Nevalainen, Katja ; Isomäki, Nora ; Honkanen, Mari ; Suihkonen, Reija ; McNally, Tony ; Harkin-Jones, Eileen ; Syrjälä, Seppo ; Vuorinen, Jyrki ; Järvelä, Pentti. / Melt-compounded nanocomposites of titanium dioxide atomic-layer-deposition-coated polyamide and polystyrene powders. In: Polymers for Advanced Technologies. 2012 ; Vol. 23, No. 3. pp. 357-366.
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abstract = "Polyamide and polystyrene particles were coated with titanium dioxide films by atomic layer deposition (ALD) and then melt-compounded to form polymer nanocomposites. The rheological properties of the ALD-created nanocomposite materials were characterized with a melt flow indexer, a melt flow spiral mould, and a rotational rheometer. The results suggest that the melt flow properties of polyamide nanocomposites were markedly better than those of pure polyamide and polystyrene nanocomposites. Such behavior was shown to originate in an uncontrollable decrease in the polyamide molecular weight, likely affected by a high thin-film impurity content, as shown in gel permeation chromatography (GPC) and scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer. Transmission electron microscope image showed that a thin film grew on both studied polymer particles, and that subsequent melt-compounding was successful, producing well dispersed ribbon-like titanium dioxide with the titanium dioxide filler content ranging from 0.06 to 1.12wt{\%}. Even though we used nanofillers with a high aspect ratio, they had only a minor effect on the tensile and flexural properties of the polystyrene nanocomposites. The mechanical behavior of polyamide nanocomposites was more complex because of the molecular weight degradation. Our approach here to form polymeric nanocomposites is one way to tailor ceramic nanofillers and form homogenous polymer nanocomposites with minimal work-related risks in handling powder form nanofillers. However, further research is needed to gauge the commercial potential of ALD-created nanocomposite materials.",
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Nevalainen, K, Isomäki, N, Honkanen, M, Suihkonen, R, McNally, T, Harkin-Jones, E, Syrjälä, S, Vuorinen, J & Järvelä, P 2012, 'Melt-compounded nanocomposites of titanium dioxide atomic-layer-deposition-coated polyamide and polystyrene powders', Polymers for Advanced Technologies, vol. 23, no. 3, pp. 357-366. https://doi.org/10.1002/pat.1879

Melt-compounded nanocomposites of titanium dioxide atomic-layer-deposition-coated polyamide and polystyrene powders. / Nevalainen, Katja; Isomäki, Nora; Honkanen, Mari; Suihkonen, Reija; McNally, Tony; Harkin-Jones, Eileen; Syrjälä, Seppo; Vuorinen, Jyrki; Järvelä, Pentti.

In: Polymers for Advanced Technologies, Vol. 23, No. 3, 01.03.2012, p. 357-366.

Research output: Contribution to journalArticle

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AU - Nevalainen, Katja

AU - Isomäki, Nora

AU - Honkanen, Mari

AU - Suihkonen, Reija

AU - McNally, Tony

AU - Harkin-Jones, Eileen

AU - Syrjälä, Seppo

AU - Vuorinen, Jyrki

AU - Järvelä, Pentti

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N2 - Polyamide and polystyrene particles were coated with titanium dioxide films by atomic layer deposition (ALD) and then melt-compounded to form polymer nanocomposites. The rheological properties of the ALD-created nanocomposite materials were characterized with a melt flow indexer, a melt flow spiral mould, and a rotational rheometer. The results suggest that the melt flow properties of polyamide nanocomposites were markedly better than those of pure polyamide and polystyrene nanocomposites. Such behavior was shown to originate in an uncontrollable decrease in the polyamide molecular weight, likely affected by a high thin-film impurity content, as shown in gel permeation chromatography (GPC) and scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer. Transmission electron microscope image showed that a thin film grew on both studied polymer particles, and that subsequent melt-compounding was successful, producing well dispersed ribbon-like titanium dioxide with the titanium dioxide filler content ranging from 0.06 to 1.12wt%. Even though we used nanofillers with a high aspect ratio, they had only a minor effect on the tensile and flexural properties of the polystyrene nanocomposites. The mechanical behavior of polyamide nanocomposites was more complex because of the molecular weight degradation. Our approach here to form polymeric nanocomposites is one way to tailor ceramic nanofillers and form homogenous polymer nanocomposites with minimal work-related risks in handling powder form nanofillers. However, further research is needed to gauge the commercial potential of ALD-created nanocomposite materials.

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KW - Atomic layer deposition

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