Treatment of waste printed circuit board by green solvent using ionic liquid

► Recycling waste printed circuit boards (WPCBs) by ionic liquid (IL). ► The epoxy resins of WPCBs are slightly dissolved to produce initial delamination at 240°C. ► The epoxy resins of WPCBs are removed by [EMIM+][BF4-] at 260°C. Recycling of waste printed circuit boards (WPCBs) is an important sub...

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Veröffentlicht in:Waste management (Elmsford) Jg. 32; H. 10; S. 1914 - 1918
Hauptverfasser: Zhu, P., Chen, Y., Wang, L.Y., Zhou, M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Kidlington Elsevier Ltd 01.10.2012
Elsevier
Schlagworte:
Applied sciences
bromine
Bromine Compounds - chemistry
Bromine epoxy resin
Copper foil
delamination
Dissolving
Electronic Waste
epoxides
Epoxy Resins - chemistry
Exact sciences and technology
General treatment and storage processes
glass fibers
Imidazoles - chemistry
ionic liquids
Other wastes and particular components of wastes
Pollution
Recycling
resins
temperature
Waste printed circuit board
waste treatment
Wastes
Waste printed circuit board
Copper foil
Dissolving
Bromine epoxy resin
Pollution
Recycling
Glass fiber
Waste treatment
ISSN:0956-053X, 1879-2456, 1879-2456
Online-Zugang:Volltext
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Zusammenfassung:► Recycling waste printed circuit boards (WPCBs) by ionic liquid (IL). ► The epoxy resins of WPCBs are slightly dissolved to produce initial delamination at 240°C. ► The epoxy resins of WPCBs are removed by [EMIM+][BF4-] at 260°C. Recycling of waste printed circuit boards (WPCBs) is an important subject not only for the protection of environment but also for the recovery of valuable materials. A feasibility study was conducted to dissolve bromine epoxy resins of WPCBs using ionic liquid (IL) of 1-ethyl-3-methylimizadolium tetrafluoroborate [EMIM+][BF4-] (nonaqueous green solvent) for recovering copper foils and glass fibers. Experimental results indicated that the initial delamination had seen from the cross-section of the WPCBs by mean of metallographic microscope and digital camera when WPCBs were heated in [EMIM+][BF4-] at 240°C for a duration of 30min. When temperature was increased to 260°C for a duration of 10min, the bromine epoxy resins of WPCBs were throughout dissolved into [EMIM+][BF4-] and the separations of copper foils and glass fibers from WPCBs were completed. This clean and non-polluting technology offers a new way to recycle valuable materials from WPCBs and prevent the environmental pollution of WPCBs effectively.
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ISSN:0956-053X
1879-2456
1879-2456
DOI:10.1016/j.wasman.2012.05.025