Recycling of waste automotive laminated glass and valorization of polyvinyl butyral through mechanochemical separation

• Published in: Environmental research 2015-10, Vol.142, p.615-623
• Main Authors: Swain, Basudev, Ryang Park, Jae, Yoon Shin, Dong, Park, Kyung-Soo, Hwan Hong, Myung, Gi Lee, Chan
• Format: Article
• Language: English
• Subjects: ABSORPTION SPECTROSCOPY; Automobiles; Automotive components; Automotive glass; Automotive waste; CHEMICAL WASTES; Environmental Pollutants - analysis; Environmental Pollutants - chemistry; GLASS; INFRARED SPECTRA; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; Laminated glass recycling; Land; Mechanochemical separation; Microscopy, Electron, Scanning; NUCLEAR MAGNETIC RESONANCE; Polyvinyl butyral; POLYVINYLS; Polyvinyls - chemistry; PVB recycling; RECYCLING; Republic of Korea; RESINS; SCANNING ELECTRON MICROSCOPY; Separation; SEPARATION PROCESSES; Spectrum Analysis - methods; Wastes; X-RAY SPECTROSCOPY
• ISSN: 0013-9351; 1096-0953
• DOI: 10.1016/j.envres.2015.08.017

Due to strong binding, optical clarity, adhesion to many surfaces, toughness and flexibility polyvinyl butyral (PVB) resin films are commonly used in the automotive and architectural application as a protective interlayer in the laminated glass. Worldwide million tons of PVB waste generated from end-of-life automotive associated with various environmental issues. Stringent environmental directive, higher land cost eliminates land filling option, needs a study, we have developed a mechanochemical separation process to separate PVB resins from glass and characterized the separated PVB through various techniques, i.e., scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), infrared spectroscopy (IR) and nuclear magnetic resonance spectroscopy (NMR). Commercial nonionic surfactants D201 used for the mechanochemical separation purpose. Through parameter optimization following conditions are considered to be the optimum condition; 30vol% D201, stirring speed of 400rpm, 35°C temperature, operation time 1h, and dilute D201 volume to waste automotive laminated glass weight ratio of ≈25. The technology developed in our laboratory is sustainable, environmentally friendly, techno-economical feasible process, capable of mass production (recycling). [Display omitted] •Waste automotive laminated glass and polyvinyl butyral mechanochemically separated.•An economical total recovery and environment-friendly process has been developed.•It is a global problem rather than regional environmental issue has been addressed.•Without using hazardous chemical wastes are being converted to a wealth.