A new technology for separation and recovery of materials from waste   printed circuit boards by dissolving bromine epoxy resins using ionic   liquid

doi:10.1016/j.jhazmat.2012.08.071

CORC > 北京大学 > 信息科学技术学院

	A new technology for separation and recovery of materials from waste printed circuit boards by dissolving bromine epoxy resins using ionic liquid
	Zhu, P. ; Chen, Y. ; Wang, L. Y. ; Qian, G. Y. ; Zhou, M. ; Zhou, J.
刊名	journal of hazardous materials
	2012
关键词	WPCBs Recycling Ionic liquid Melting Dissolution Separation PYROLYSIS DECOMPOSITION NONMETALS PRODUCTS SCRAP
DOI	10.1016/j.jhazmat.2012.08.071
英文摘要	Recovery of valuable materials from waste printed circuit boards (WPCBs) is quite difficult because WPCBs is a heterogeneous mixture of polymer materials, glass fibers, and metals. In this study,WPCBs was treated using ionic liquid (1-ethyl-3-methylimizadolium tetrafluoroborate [EMIM+][BF4-]). Experimental results showed that the separation of the solders went to completion, and electronic components (ECs) were removed in WPCBs when [EMIM+][BF4-] solution containing WPCBs was heated to 240 degrees C. Meanwhile, metallographic observations verified that the WPCBs had an initial delamination. When the temperature increased to 260 degrees C, the separation of the WPCBs went to completion, and coppers and glass fibers were obtained. The used [EMIM+][BF4-] was treated by water to generate a solid-liquid suspension, which was separated completely to obtain solid residues by filtration. Thermal analyses combined with infrared ray spectra (IR) observed that the solid residues were bromine epoxy resins. NMR (nuclear magnetic resonance) showed that hydrogen bond played an important role for [EMIM+][BF4-] dissolving bromine epoxy resins. This clean and non-polluting technology offers a new way to recycle valuable materials from WPCBs and prevent environmental pollution from WPCBs effectively. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000310763600033&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Engineering, Civil; Environmental Sciences; SCI(E); EI; 15; ARTICLE; 270-278; 239
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/229339]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhu, P.,Chen, Y.,Wang, L. Y.,et al. A new technology for separation and recovery of materials from waste printed circuit boards by dissolving bromine epoxy resins using ionic liquid[J]. journal of hazardous materials,2012.
APA	Zhu, P.,Chen, Y.,Wang, L. Y.,Qian, G. Y.,Zhou, M.,&Zhou, J..(2012).A new technology for separation and recovery of materials from waste printed circuit boards by dissolving bromine epoxy resins using ionic liquid.journal of hazardous materials.
MLA	Zhu, P.,et al."A new technology for separation and recovery of materials from waste printed circuit boards by dissolving bromine epoxy resins using ionic liquid".journal of hazardous materials (2012).