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化工学报  2015 

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

DOI: 10.11949/j.issn.0438-1157.20141351, PP. 1185-1193

Keywords: 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

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Abstract:

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75ml、喷雾速率为3.2cm·s-1、雾化气速为58.98m·s-1、床层温度为80℃、喷动气速为29.49m·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%。

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