Recycling Non-Metallic Powder of Waste Printed Circuit Boards to Improve the Performance of Asphalt Material.
Recycling Non-Metallic Powder of Waste Printed Circuit Boards to Improve the Performance of Asphalt Material.
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回收废旧印刷电路板非金属粉末提高沥青材料性能
DOI：
10.3390/ma15124172
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发表时间：
2022-06-12
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
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废印刷电路板（PCB）中的非金属组分（NMF）主要由固化树脂和纤维组成。在这项研究中，从PCB的NMF材料研磨成粉末，并添加到基质沥青，以生产PCB-NMF-改性沥青。为了改善PCB-NMF与沥青的相容性，还开发了由桐油和甘油组成的相容剂。通过一系列实验室测试，包括软化点、针入度、延展性和软化点差（SPD），确定最佳相容剂含量为PCB-NMF重量的8%。通过傅里叶变换红外光谱（FTIR）和扫描电镜（SEM）分析了NMF粉末改性沥青的微观机理。采用动态剪切流变仪（DSR）和低温弯曲梁流变仪（BBR）对PCB-NMF改性沥青的性能进行了评价。最佳相容剂含量为NMF粉末的8重量%，基于综合评价，确定NMF粉末的最佳含量为沥青的30重量%。结果表明，在适当的掺量下，PCB-NMF能显著提高沥青材料的刚度、抗车辙能力、高温稳定性和温度敏感性。BBR测试表明，PCB-NMF略微削弱了沥青在低温下的抗裂性。SEM测试表明，相容剂的加入使NMF粉体分散均匀，提高了相容性。FTIR测试结果表明，PCB-NMF、相容剂和基质沥青之间可能没有发生化学反应。总体而言，利用多氯联苯-NMF作为沥青材料的改性剂并以低成本减少电子废物处理是一种有前途的可持续方式。
Non-metallic fractions (NMFs) from waste printed circuit boards (PCBs) are mostly composed of cured resin and fiber. In this study, NMF material from a PCB was ground into powder and added into matrix asphalt to produce PCB-NMF-modified asphalt. To improve the compatibility of PCB-NMF and asphalt, a compatibilizer consisting of tung oil and glycerol was also developed. The optimum compatibilizer content was determined to be 8% by weight of the PCB-NMF through a series of laboratory tests, including the softening point, penetration, ductility, and softening point difference (SPD). The micro-mechanism of NMF powder-modified asphalt was analyzed through Fourier transform infrared spectroscopy (FTIR) and a scanning electron microscope test (SEM). The performances of PCB-NMF-modified asphalt were evaluated by the dynamic shear rheology (DSR) test and the low-temperature bending beam rheometer (BBR) test. The optimum compatibilizer content was 8% by weight of the NMF powder and the optimum content of NMF powder was determined to be 30% by weight of the asphalt based on a comprehensive evaluation. The results show that PCB-NMF can significantly improve stiffness, rutting resistance, high-temperature stability, and temperature sensitivity of asphalt material at an appropriate content. The BBR tests revealed that PCB-NMF slightly weakened the cracking resistance of asphalt at low temperatures. The SEM test showed that the addition of a compatibilizer can increase the compatibility by making the NMF powder evenly dispersed. The FTIR test results implied that a chemical reaction may not have happened between PCB-NMF, compatibilizer, and the matrix asphalt. Overall, it is a promising and sustainable way to utilize PCB-NMF as a modifier for asphalt material and reduce electronic waste treatment at a low cost.
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影响因子：
11.1
作者：
Lv, Songtao;Xia, Chengdong;Zheng, Jianlong
通讯作者：
Zheng, Jianlong
影响因子：
5.3
作者：
Ilyin, Sergey O.;Strelets, Larisa A.
通讯作者：
Strelets, Larisa A.
DOI：
10.1061/(asce)mt.1943-5533.0000504
发表时间：
2012-10-01
影响因子：
3.2
作者：
Colbert, Baron W.;You, Zhanping
通讯作者：
You, Zhanping
影响因子：
3.8
作者：
Angelone, Silvia;Cauhape Casaux, Marina;Martinez, Fernando O.
通讯作者：
Martinez, Fernando O.
影响因子：
8.7
作者：
Yang, Fan;Sun, Shuiyu;Wu, Jiaqi
通讯作者：
Wu, Jiaqi