In this research paper, we reported the synthesis of biochar-based composites using biochar derived from exhausted tea leaves and polypropylene. The resulting materials were deeply characterized investigating mechanical (dynamic mechanical thermal analysis), thermal (thermogravimetrical analysis and differential scanning calorimetry), morphological (field emission scanning microscopy) and electrical properties vs. temperature. Furthermore, electrical conductivity was studied for a wide range of pressures showing an irreversible plastic deformation. An increment of one order of magnitude in the conductivity was observed in the case of 40 wt% biochar loading, reaching a value of 0.2 S/m. The material produced exhibited the properties of an irreversible pressure sensor.

中文翻译：

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压力响应性聚丙烯和生物炭基材料的开发。

在这篇研究论文中，我们报道了使用由枯竭的茶叶和聚丙烯制成的生物炭合成生物炭基复合材料的方法。对所得材料进行了深入的表征，研究了机械（动态机械热分析），热（热重分析和差示扫描量热法），形态学（场发射扫描显微镜）以及电性能随温度的变化。此外，还对显示出不可逆塑性变形的各种压力下的导电性进行了研究。在生物炭负载量为40 wt％的情况下，电导率增加了一个数量级，达到0.2 S / m。产生的材料表现出不可逆压力传感器的特性。