Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments

Eduardo Saez Rodriguez, Liu Yang, James Thomason

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

The strength loss of thermally treated glass fibre (GF) at elevated temperature is well reported in literature. This phenomenon even occurs at short period of time such as 25 minutes. In the recycling technologies for composites, GFs are usually recovered by degradation of polymeric matrix with thermal and/or chemical treatments. Therefore thermal effect on the strength of GF is a significant factor when restricting the possibilities of recycling this material for a second life.
This study reports on the strength of thermally treated commercial GF after acid treatment and silanization of the fibre surface to achieve a proper combination of treatments which may provide us with the ability to recover the mechanical properties of the heat treated GFs. It is thought that silane coupling agents can directly increase and recover the strength of GFs. Two factors associated with this recovery are the possibility of the sizing repairing the damage on the surface of the heat treated GFs and the reduction of the fibre-fibre friction in the bundle through lubricating effect.
GF samples were heat treated at 4500C for 25 minutes and coated with silanes, applying different combinations of hydrochloric acid (HCl) and the two silanes used in this study, γ-Aminopropyltrimethoxy Silane (APS) and γ- Methacryloxypropyltrimethoxy Silane (MPS); these fibres were characterized by single fibre testing for strength. The results obtained demonstrated that the fibre strength improves slightly after combination of HCl and MPS treatment, and has a negative effect when the combination of HCl and APS was used. The surface deposition of silane on the surface of the fibre is also discussed using a Scanning Electron Microscope (SEM).
LanguageEnglish
Number of pages12
Publication statusPublished - 28 Jul 2013
Event19th International Conference on Composite Materials - Montréal, Canada
Duration: 28 Jul 20132 Aug 2013

Conference

Conference19th International Conference on Composite Materials
CountryCanada
CityMontréal
Period28/07/132/08/13

Fingerprint

Silanes
Glass fibers
Recovery
Fibers
Hydrochloric Acid
Hydrochloric acid
Recycling
Hot Temperature
fiberglass
Coupling agents
Thermal effects
Electron microscopes
Friction
Scanning
Degradation
Mechanical properties
Acids
Composite materials
Testing

Keywords

  • glass fibres
  • recycling
  • mechanical properties
  • hydrochloric acid
  • silane

Cite this

Saez Rodriguez, E., Yang, L., & Thomason, J. (2013). Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments. Paper presented at 19th International Conference on Composite Materials, Montréal, Canada.
Saez Rodriguez, Eduardo ; Yang, Liu ; Thomason, James. / Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments. Paper presented at 19th International Conference on Composite Materials, Montréal, Canada.12 p.
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Saez Rodriguez, E, Yang, L & Thomason, J 2013, 'Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments' Paper presented at 19th International Conference on Composite Materials, Montréal, Canada, 28/07/13 - 2/08/13, .

Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments. / Saez Rodriguez, Eduardo; Yang, Liu; Thomason, James.

2013. Paper presented at 19th International Conference on Composite Materials, Montréal, Canada.

Research output: Contribution to conferencePaper

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T1 - Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments

AU - Saez Rodriguez, Eduardo

AU - Yang, Liu

AU - Thomason, James

PY - 2013/7/28

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N2 - The strength loss of thermally treated glass fibre (GF) at elevated temperature is well reported in literature. This phenomenon even occurs at short period of time such as 25 minutes. In the recycling technologies for composites, GFs are usually recovered by degradation of polymeric matrix with thermal and/or chemical treatments. Therefore thermal effect on the strength of GF is a significant factor when restricting the possibilities of recycling this material for a second life.This study reports on the strength of thermally treated commercial GF after acid treatment and silanization of the fibre surface to achieve a proper combination of treatments which may provide us with the ability to recover the mechanical properties of the heat treated GFs. It is thought that silane coupling agents can directly increase and recover the strength of GFs. Two factors associated with this recovery are the possibility of the sizing repairing the damage on the surface of the heat treated GFs and the reduction of the fibre-fibre friction in the bundle through lubricating effect.GF samples were heat treated at 4500C for 25 minutes and coated with silanes, applying different combinations of hydrochloric acid (HCl) and the two silanes used in this study, γ-Aminopropyltrimethoxy Silane (APS) and γ- Methacryloxypropyltrimethoxy Silane (MPS); these fibres were characterized by single fibre testing for strength. The results obtained demonstrated that the fibre strength improves slightly after combination of HCl and MPS treatment, and has a negative effect when the combination of HCl and APS was used. The surface deposition of silane on the surface of the fibre is also discussed using a Scanning Electron Microscope (SEM).

AB - The strength loss of thermally treated glass fibre (GF) at elevated temperature is well reported in literature. This phenomenon even occurs at short period of time such as 25 minutes. In the recycling technologies for composites, GFs are usually recovered by degradation of polymeric matrix with thermal and/or chemical treatments. Therefore thermal effect on the strength of GF is a significant factor when restricting the possibilities of recycling this material for a second life.This study reports on the strength of thermally treated commercial GF after acid treatment and silanization of the fibre surface to achieve a proper combination of treatments which may provide us with the ability to recover the mechanical properties of the heat treated GFs. It is thought that silane coupling agents can directly increase and recover the strength of GFs. Two factors associated with this recovery are the possibility of the sizing repairing the damage on the surface of the heat treated GFs and the reduction of the fibre-fibre friction in the bundle through lubricating effect.GF samples were heat treated at 4500C for 25 minutes and coated with silanes, applying different combinations of hydrochloric acid (HCl) and the two silanes used in this study, γ-Aminopropyltrimethoxy Silane (APS) and γ- Methacryloxypropyltrimethoxy Silane (MPS); these fibres were characterized by single fibre testing for strength. The results obtained demonstrated that the fibre strength improves slightly after combination of HCl and MPS treatment, and has a negative effect when the combination of HCl and APS was used. The surface deposition of silane on the surface of the fibre is also discussed using a Scanning Electron Microscope (SEM).

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Saez Rodriguez E, Yang L, Thomason J. Investigation of strength recovery of recycled heat treated glass fibres through chemical treatments. 2013. Paper presented at 19th International Conference on Composite Materials, Montréal, Canada.