导向管喷动流化床中废弃印刷线路板的非金属颗粒包覆改性  

Coating modification of non-metal particles of waste printed circuit boards in spout-fluid bed with draft tube

作　　者：谢恒来 吴曼[1] 赵军[1] 陈义忠[1] 郭庆杰[1] 

机构地区：[1]青岛科技大学化工学院,山东省多相流体反应与分离工程重点实验室,山东青岛266042

出　　处：《化工学报》2015年第3期1185-1193,共9页CIESC Journal

基　　金：国家高技术研究发展计划项目(SS2012AA062613);山东省科技攻关项目(2008GG10006010)~~

摘　　要：以3-氨基丙基三乙氧基硅烷(KH-550)为改性剂,在导向管喷动流化床内对废弃印刷线路板的非金属颗粒(NPWPCB)进行包覆改性,研究了颗粒包覆过程中KH-550溶液(体积分数20%)用量、喷雾速率、雾化气速、床层温度及喷动气速等操作参数对NPWPCB改性效果的影响。以聚丙烯(PP)为基体、改性NPWPCB为填料,采用挤出注塑工艺制备了PP/NPWPCB复合材料。通过红外光谱图和扫描电子显微镜对改性前后NPWPCB表面官能团及复合材料冲击断面微观形貌的分析表明,KH-550可以增加NPWPCB与PP基体之间的界面黏结强度,提高PP/NPWPCB复合材料的力学性能。当KH-550溶液用量为75 ml、喷雾速率为3.2 cm·s-1、雾化气速为58.98m·s-1、床层温度为80℃、喷动气速为29.49 m·s-1时,复合材料的弯曲、拉伸和冲击强度较改性前分别提高了15.07%、17.52%和16.32%。Non-metal particles of waste printed circuit boards （NPWPCB） were modified with 3-aminopropyltriethoxysilane （KH-550） by coating in a spout-fluid bed with draft tube. To obtain the range of operating parameters for the modification, the effects of KH-550 solution （20%（vol）） volume, spray rate, atomizing gas velocity, bed temperature, and spouting gas velocity on modification were evaluated. The modified NPWPCB were used as filler to fabricate PP/NPWPCB composites by extrusion and injection molding. The variations of the surface functional groups and the cross-section morphology were characterized by infrared spectroscopy and scanning electron microscopy. Modified NPWPCB improved the interface bonding between NPWPCB and PP, which enhanced the mechanical properties of PP/NPWPCB composites. At KH-550 solution （20%（vol）） volume of 75 ml, spray rate of 3.2 cm·s^-1, atomizing gas velocity of 58.98 m·s^-1, bed temperature of 80℃, and spouting gas velocity of 29.49 m·s^-1, flexural strength, tensile strength, and impact strength of the composites increased by 15.07%, 17.52%and 16.32%, respectively.

关 键 词：导向管喷动流化床 废弃印刷线路板的非金属颗粒 包覆改性 废物处理 复合材料 粉体技术 

分 类 号：X783.2[环境科学与工程—环境工程]