聚四氟乙烯型印刷线路板的热解实验

PTFE

聚四氟乙烯型印刷线路板的热解实验
Experimental research on pyrolysis of polytetrafluoroethylene-printed circuit boards
作　　者：郭晓娟 张于峰 魏莉莉 马洪亭

Guo Xiaojuan ,Zhang Yufeng ,Wei Lili Ma Hongting （School of Environmental Science and Engineering, Tianjing University, Tianjin 300072, China）

机构地区：天津大学环境科学与工程学院,天津300072

出　　处：《华中科技大学学报：自然科学版》 EI CAS CSCD 2008年第36卷第10期 121-124页,共4页

JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE

基　　金：国家自然科学基金资助项目（50378062）;教育部科学技术研究重点项日（108030）.

摘　　要：利用热重（TG）法进行了聚四氟乙烯（PTFE）型印刷线路板不同升温速率的热解特性实验研究，建立了表观热解反应动力学模型．利用固定床热解试验装置进行了PTFE线路板热解实验，利用气-质联用（GC—MS）和扫描电镜（SEM）分别检测了热解气体和固体产物．结果表明：a．所建热解模型与实验数据符合较好，求得动力学三参数分别为活化能223．606kJ／mol，反应级数0，指前因子1．529×10^13min^-1;b．热解气体产物主要为八氟环丁烷．手动剥离即可实现金属和玻璃纤维等组分的分离富集．富集的金属片主要为铜片及其镀层上含有少量的金、镍等贵重金属；富集的玻璃纤维中含有大量的碳，还有一定量的O，F，Al，Si，Ca，Ti等元素．

Pyrolysis characteristics of waste polytetrafluoroethylene（PTFE）-printed circuit boards were investigated under different heating rates with thermogravimetry （TG）. A kinetic model for expressing the pyrolysis reaction was established. A fixed-bed experimental apparatus was used to pyro lyze the printed circuit boards and the products were analysised by using gas chromatograph and mass spectrometer （GC-MS） and scanning electronic microscopy （SEM）. The results show： a. the kinetics model was in good agreement with the experimental ones at four heating rates, the kinetics parameters of polytetrafluoroethylene-type printed circuit boards was zero-order for reaction order, 223. 606 kJ/mol for the activation energy, 1. 529× 1013 min ^-1 for pre-exponential factor; b. octafluorocyclobutane was the main content of the pyrolysis gas. Glass fiber and metallic fractions were easily seperated and accumulated. The accumulated metals were mainly copper strip and a bit golden and nickel were plated on the strips. The enriched glassfibre consists of amount of carbon and significant concentra- tions of O,F,AI,Si,Ca,Ti.

关 键 词：印刷线路板 热解实验 聚四氟乙烯 反应动力学模型 分离富集 玻璃纤维 气-质联用 八氟环丁烷
printed circuit board polytetrafluoroethylene（PTFE） solid waste pyrolysis kineticmodel analysis of the product
分 类 号： TQ325.4 [工业技术 > 化学工业 > 合成树脂与塑料工业 > 聚合类树脂及塑料] TN41 [工业技术 > 无线电电子学、电信技术 > 微电子学、集成电路（IC）]

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