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Recycling Technology for Waste Glass Fiber Reinforced Plastics (GFRP) Using Pyrolysis with NaOH

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Abstract:

Glass fiber reinforced plastics (GFRP) are composite materials with high strength and flame retardancy, and the disposal process is expensive to cause illegal dumping. Therefore, new recycling technology of waste GFRP are desired. In this study, recycling of waste GFRP using pyrolysis with sodium hydroxide (NaOH) under an inert atmosphere was attempted by gasification of resin and conversion of glass fiber into soluble sodium silicate. The pyrolysis behavior of GFRP, the characteristics of the obtained residue, the composition and the yield of generated gas, and the silica extraction into the solution were investigated. As a result, the gasification of the resin and the conversion of the glass fiber into soluble sodium silicate were promoted by pyrolysis with NaOH. It was confirmed that the gas yield, especially flammable gases (H2 and CH4), and the silica extraction increased and the residual ratio decreased as the increase of the heating temperature, NaOH addition and heating time.

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Material Science and Engineering Technology IX View Preview

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Periodical:

Materials Science Forum (Volume 1023)

Pages:

91-96

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1023.91

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Online since:

March 2021

Authors:

Masayuki Miyazawa*, Takaaki Wajima

Keywords:

Alkali Fusion, GFRP, NaOH, Pyrolysis

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© 2021 Trans Tech Publications Ltd. All Rights Reserved

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