离子液体加热法处理废旧印刷电路板  

The Properties of Treating Waste Printed Circuit Boards by Ionic Liquids

作　　者：董晶颢[1] 闫文慧 张婷 郭恒伯 宋柳昱 DONG Jing-hao;YAN Wen-hui;ZHANG Ting;GUO Heng-bo;SONG Liu-yu(Chemical and Environmental Engineering,Harbin University of Science and Technology,Harbin 150040,China)

机构地区：[1]哈尔滨理工大学化学与环境工程学院

出　　处：《哈尔滨理工大学学报》2019年第4期133-138,共6页Journal of Harbin University of Science and Technology

基　　金：黑龙江省自然科学基金(面上项目)(E2018043);黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2015046)

摘　　要：针对废旧印刷电路板处理不当带来的环境污染和资源浪费,本研究使用由两步合成法制备的咪唑类离子液体1-丁基-3甲基咪唑硫酸氢盐([Bmim]HSO 4)为处理液,探究[Bmim]HSO 4分解电路板的特性,考察温度、加热时间及电路板尺寸大小对电路板分解程度的影响。在温度270℃、加热时间20±2 min、电路板尺寸大小为2×2 cm^ 2条件时,溴化环氧树脂的溶解程度最大,电路板的分解程度最大;另外,回收的[Bmim]HSO 4化学组分基本无变化,可循环使用。电路板经[Bmim]HSO 4处理后,铜箔、焊料和玻璃纤维自动分离便于后续的回收,为废旧印刷电路板的无害化处理和资源回收提供了一条新途径。Improper treatment about waste printed circuit boards(WPCBs)can cause serious environmental pollution and resources waste.In this study,1-butyl-3-methyl-imidazolium hydrogen sulfate([Bmim]HSO 4)was synthesized through two-step reaction.Separation properties of WPCBs treated by[Bmim]HSO 4 was investigated.The influence of treatment temperature,reaction time and particle size of WPCBs on dismantlement of WPCBs were focused.Experimental results indicated that WPCBs can be separated efficiently and non-polluted.The maximum dissolution of brominated epoxy resin(BER)in WPCBs occurred by controlling the system temperature,heating time,the size of WPCBs at 270℃,20±2 min and 2×2 cm^2,respectively.The used[Bmim]HSO 4 can be recycled.This study offers an effectively way to recycle WPCBs and prevent the environmental pollution of WPCBs.

关 键 词：废旧印刷电路板 离子液体 溶解 溴化环氧树脂 

分 类 号：O436[机械工程—光学工程]