The use of wastes in the development of useful material is a key aspect of solid waste management. The aim of this study was to utilize biochar from elephant grass (Pennisetum purpureum) as fillers in polystyrene composites with focus on the morphological and thermal properties of the developed composites. The composites were prepared by hand lay-up technique. The prepared resin and final composite were characterized using scanning electron microscopy, differential scanning calorimetry and Fourier-transform infrared spectroscopy. The biochar also did not contain any reactive hydrophilic groups, thus, it is compatible with polystyrene. Estimated heat capacities of the composites from the thermal test results showed that to obtain a composite of heat capacity range between 600 J/kg·K and 760 J/kg·K, a 10–30 wt% range of biochar composition should be maintained. At 30 wt% biochar composition, heat capacity was at a maximum value of 757.66 J/kg·K.

在开发有用材料中使用废物是固体废物管理的关键方面。这项研究的目的是利用大象草（狼尾草）作为聚苯乙烯复合材料中的填料，重点关注已开发复合材料的形态和热性能。通过手工铺层技术制备复合材料。使用扫描电子显微镜，差示扫描量热法和傅里叶变换红外光谱对制备的树脂和最终复合材料进行表征。该生物炭也不含任何反应性亲水基团，因此，它与聚苯乙烯相容。根据热测试结果估算的复合材料的热容量表明，要获得600 J / kg·K至760 J / kg·K的热容量范围的复合材料，应保持10–30 wt％的生物炭成分范围。在生物炭组成为30 wt％时，热容量的最大值为757.66 J / kg·K。