Reduction of Discard Glass Fiber Reinforced Plastics (GFRP) Using Thermal Decomposition after Immersion in Sodium Hydroxide Solution
Keywords:
GFRP, NaOH, Thermal decomposition, Alkali fusion, Volume reductionAbstract
In this study, the reduction of discarded glass fiber-reinforced plastics (GFRP) using thermal decomposition with sodium hydroxide was attempted as a new technology. After immersing GFRP in NaOH solution to adhere NaOH on the surface of GFRP, thermal decomposition treatment was performed under an inert atmosphere to occur gasification of resin and conversion of glass fiber into soluble sodium silicate in the GFRP. As a result, the gasification of the resin and the conversion of the glass fiber into soluble sodium silicate were promoted by thermal decomposition treatment after immersion in the NaOH solution. Furthermore, it was confirmed that the reduction of the weight and strength of the residue was promoted by the treatment with HCl due to the extraction of silica and calcium.
References
Kondo A, Abe H, Isu N, et al., 2010, Development of Light Weight Materials with Low Thermal Conductivity by Making Use of Waste FRP. J Soc Powder Technol, 47(11): 768–772.
Fujii Y, 2008, Advances in Composite Materials Technology for Reducing Environmental Impact. Journal of the Society of Materials Science, 57(6): 621–625.
Iwaya T, Tokuno S, Sasaki M, et al., 2008, Recycling of Fiber Reinforced Plastics Using Depolymerization by Solvothermal Reaction with Catalyst. Mater Sci, 43: 2452–2456.
Nakagawa N, Urabe T, Hidaka M, et al., 2006, Development of FRP Recycling Technology by Subcritical Water Splitting. Network Polymer, 27(2): 88–94.
Katano S, Wajima T, Nakagome H, 2014, Recovery of Tantalum Sintered Compact from Used Tantalum Condenser Using Steam Gasification with Sodium Hydroxide. APCBEE Procedia, 10(2014): 182‒186.
Matsuie S, Wajima, T. Proceedings of the 19th Society of Chemical Engineers Student Presentation, March 4, 2017: Development of Recycling Technology for Waste Heat Insulation Materials Utilizing Alkali Hydroxide. 2017, Society of Chemical Engineers, Public Interest Incorporated Association, Tokyo.
Baba K, Wajima T, 2017, Recycling Technology of Fiber-Reinforced Plastics Using Sodium Hydroxide. MMSE, 9(2): 150–155.
Flammable Gases: Basic Knowledge about Gases. Viewed September 30, 2019. https://www.figaro.co.jp/knowledge/inflammablegas.html
