Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites

Xiaozhen He, Ilkka Rytöluoto, Amirhossein Mahtabani, Rafal Anyszka, Eetta Saarimäki, Kari Lahti, Mika Paajanen, Wilma Dierkes, Anke Blume

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

A systematic study of the influence of surface modification of nanosilica with coupling agents having different polarities on the dielectric properties of a PP/POE/silica blend was performed. The main goal of this investigation was to tailor the chemical composition of the silica surface, in order to modify the charge trapping properties of the nanocomposites. For the modification of the silica surface, a “green” approach was utilized: a dry silanization method, which is performed without the need of a solvent. The results of the thermogravimetric analysis (TGA) indicate that the dry process is an effective method to perform silica surface modification using alkoxysilanes.
The charge trapping properties were studied by Thermally Stimulated Depolarization Current (TSDC) measurements. The obtained TSDC results show significant differences in charge trapping properties of PP/POE composites filled with differently modified silicas. Polar functional groups attached to the surface of the silica appear to have a strong effect on the charge trapping properties: The trap depth distribution becomes deeper and the trap density decreases to significantly lower levels.
All results show that incorporation of surface modified nanosilica into a PP/POE matrix is a promising approach to tailor its dielectric properties. Further development of these composites may lead to benefits for application in high-voltage cable and capacitor applications.
Original languageEnglish
Title of host publicationProceedings of the 26th Nordic Insulation Symposium, NORD-IS 19
Pages32-36
DOIs
Publication statusPublished - 8 Aug 2019
MoE publication typeA4 Article in a conference publication
Event26th Nordic Insulation Symposium on Materials, Components and Diagnostics, NORD-IS 19 - Tampere, Finland
Duration: 12 Jun 201914 Jun 2019
http://www.tut.fi/nordis19/

Publication series

SeriesProceedings of the Nordic Insulation Symposium
Volume26
ISSN2535-3969

Conference

Conference26th Nordic Insulation Symposium on Materials, Components and Diagnostics, NORD-IS 19
CountryFinland
CityTampere
Period12/06/1914/06/19
Internet address

Fingerprint

Silicon Dioxide
Surface treatment
Nanocomposites
Charge trapping
Depolarization
Dielectric properties
Coupling agents
Composite materials
Electric current measurement
Functional groups
Thermogravimetric analysis
Cables
Capacitors
Electric potential
Chemical analysis

Keywords

  • silica surface modification
  • dry silanization
  • charge trapping
  • high voltage cable

Cite this

He, X., Rytöluoto, I., Mahtabani, A., Anyszka, R., Saarimäki, E., Lahti, K., ... Blume, A. (2019). Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites. In Proceedings of the 26th Nordic Insulation Symposium, NORD-IS 19 (pp. 32-36). Proceedings of the Nordic Insulation Symposium, Vol.. 26 https://doi.org/10.5324/nordis.v0i26.3272
He, Xiaozhen ; Rytöluoto, Ilkka ; Mahtabani, Amirhossein ; Anyszka, Rafal ; Saarimäki, Eetta ; Lahti, Kari ; Paajanen, Mika ; Dierkes, Wilma ; Blume, Anke. / Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites. Proceedings of the 26th Nordic Insulation Symposium, NORD-IS 19. 2019. pp. 32-36 (Proceedings of the Nordic Insulation Symposium, Vol. 26).
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title = "Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites",
abstract = "A systematic study of the influence of surface modification of nanosilica with coupling agents having different polarities on the dielectric properties of a PP/POE/silica blend was performed. The main goal of this investigation was to tailor the chemical composition of the silica surface, in order to modify the charge trapping properties of the nanocomposites. For the modification of the silica surface, a “green” approach was utilized: a dry silanization method, which is performed without the need of a solvent. The results of the thermogravimetric analysis (TGA) indicate that the dry process is an effective method to perform silica surface modification using alkoxysilanes.The charge trapping properties were studied by Thermally Stimulated Depolarization Current (TSDC) measurements. The obtained TSDC results show significant differences in charge trapping properties of PP/POE composites filled with differently modified silicas. Polar functional groups attached to the surface of the silica appear to have a strong effect on the charge trapping properties: The trap depth distribution becomes deeper and the trap density decreases to significantly lower levels.All results show that incorporation of surface modified nanosilica into a PP/POE matrix is a promising approach to tailor its dielectric properties. Further development of these composites may lead to benefits for application in high-voltage cable and capacitor applications.",
keywords = "silica surface modification, dry silanization, charge trapping, high voltage cable",
author = "Xiaozhen He and Ilkka Ryt{\"o}luoto and Amirhossein Mahtabani and Rafal Anyszka and Eetta Saarim{\"a}ki and Kari Lahti and Mika Paajanen and Wilma Dierkes and Anke Blume",
year = "2019",
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doi = "10.5324/nordis.v0i26.3272",
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He, X, Rytöluoto, I, Mahtabani, A, Anyszka, R, Saarimäki, E, Lahti, K, Paajanen, M, Dierkes, W & Blume, A 2019, Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites. in Proceedings of the 26th Nordic Insulation Symposium, NORD-IS 19. Proceedings of the Nordic Insulation Symposium, vol. 26, pp. 32-36, 26th Nordic Insulation Symposium on Materials, Components and Diagnostics, NORD-IS 19, Tampere, Finland, 12/06/19. https://doi.org/10.5324/nordis.v0i26.3272

Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites. / He, Xiaozhen; Rytöluoto, Ilkka; Mahtabani, Amirhossein; Anyszka, Rafal; Saarimäki, Eetta; Lahti, Kari; Paajanen, Mika; Dierkes, Wilma; Blume, Anke.

Proceedings of the 26th Nordic Insulation Symposium, NORD-IS 19. 2019. p. 32-36 (Proceedings of the Nordic Insulation Symposium, Vol. 26).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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T1 - Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites

AU - He, Xiaozhen

AU - Rytöluoto, Ilkka

AU - Mahtabani, Amirhossein

AU - Anyszka, Rafal

AU - Saarimäki, Eetta

AU - Lahti, Kari

AU - Paajanen, Mika

AU - Dierkes, Wilma

AU - Blume, Anke

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N2 - A systematic study of the influence of surface modification of nanosilica with coupling agents having different polarities on the dielectric properties of a PP/POE/silica blend was performed. The main goal of this investigation was to tailor the chemical composition of the silica surface, in order to modify the charge trapping properties of the nanocomposites. For the modification of the silica surface, a “green” approach was utilized: a dry silanization method, which is performed without the need of a solvent. The results of the thermogravimetric analysis (TGA) indicate that the dry process is an effective method to perform silica surface modification using alkoxysilanes.The charge trapping properties were studied by Thermally Stimulated Depolarization Current (TSDC) measurements. The obtained TSDC results show significant differences in charge trapping properties of PP/POE composites filled with differently modified silicas. Polar functional groups attached to the surface of the silica appear to have a strong effect on the charge trapping properties: The trap depth distribution becomes deeper and the trap density decreases to significantly lower levels.All results show that incorporation of surface modified nanosilica into a PP/POE matrix is a promising approach to tailor its dielectric properties. Further development of these composites may lead to benefits for application in high-voltage cable and capacitor applications.

AB - A systematic study of the influence of surface modification of nanosilica with coupling agents having different polarities on the dielectric properties of a PP/POE/silica blend was performed. The main goal of this investigation was to tailor the chemical composition of the silica surface, in order to modify the charge trapping properties of the nanocomposites. For the modification of the silica surface, a “green” approach was utilized: a dry silanization method, which is performed without the need of a solvent. The results of the thermogravimetric analysis (TGA) indicate that the dry process is an effective method to perform silica surface modification using alkoxysilanes.The charge trapping properties were studied by Thermally Stimulated Depolarization Current (TSDC) measurements. The obtained TSDC results show significant differences in charge trapping properties of PP/POE composites filled with differently modified silicas. Polar functional groups attached to the surface of the silica appear to have a strong effect on the charge trapping properties: The trap depth distribution becomes deeper and the trap density decreases to significantly lower levels.All results show that incorporation of surface modified nanosilica into a PP/POE matrix is a promising approach to tailor its dielectric properties. Further development of these composites may lead to benefits for application in high-voltage cable and capacitor applications.

KW - silica surface modification

KW - dry silanization

KW - charge trapping

KW - high voltage cable

U2 - 10.5324/nordis.v0i26.3272

DO - 10.5324/nordis.v0i26.3272

M3 - Conference article in proceedings

T3 - Proceedings of the Nordic Insulation Symposium

SP - 32

EP - 36

BT - Proceedings of the 26th Nordic Insulation Symposium, NORD-IS 19

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He X, Rytöluoto I, Mahtabani A, Anyszka R, Saarimäki E, Lahti K et al. Surface Modification of Fumed Silica by Dry Silanization for PP/POE-based Dielectric Nanocomposites. In Proceedings of the 26th Nordic Insulation Symposium, NORD-IS 19. 2019. p. 32-36. (Proceedings of the Nordic Insulation Symposium, Vol. 26). https://doi.org/10.5324/nordis.v0i26.3272