Dias Josinaldo O, Conceição Amanda O, Siqueira Rayara, Coelho Bruno Fonseca, Oliveira Patrícia S
Agricultural Sciences and Engineering Center, Federal University of Espírito Santo, Vitoria 29075-910, Brazil.
Federal Center for Technological Education of Minas Gerais, Belo Horizonte 30421-169, Brazil.
Polymers (Basel). 2025 May 16;17(10):1370. doi: 10.3390/polym17101370.
Incorporating solid waste into polymeric matrices has proven effective in developing composites with enhanced mechanical and thermal properties. This study investigates a composite based on recycled high-density polyethylene (HDPE), reinforced with fine charcoal particles, assessing its thermal, microstructural, and density properties. Two processing methods (compression molding and extrusion) and four charcoal concentrations (0%, 5%, 10%, and 15 wt%) were evaluated. Thermal characterization was performed using thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). The microstructure was analyzed through scanning electron microscopy (SEM) and X-ray diffraction (XRD), while the density was determined via X-ray densitometry. SEM revealed increased porosity with charcoal addition. The thermal properties and crystallinity of the composites were not significantly affected by variations in the manufacturing method or charcoal concentration. FTIR analysis identified characteristic peaks, while TGA indicated mass loss between 400 and 500 °C, with a maximum decomposition temperature of 487 °C. XRD confirmed the semicrystalline structure typical of HDPE. Thus, incorporating charcoal residues can reduce the use of fossil-based materials while providing a sustainable application for industrial waste.
将固体废物掺入聚合物基体已被证明在开发具有增强机械性能和热性能的复合材料方面是有效的。本研究调查了一种以再生高密度聚乙烯（HDPE）为基础、用细木炭颗粒增强的复合材料，评估其热性能、微观结构和密度特性。评估了两种加工方法（压缩成型和挤出）以及四种木炭浓度（0%、5%、10%和15 wt%）。使用热重分析（TGA）和傅里叶变换红外光谱（FTIR）进行热表征。通过扫描电子显微镜（SEM）和X射线衍射（XRD）分析微观结构，同时通过X射线密度测定法测定密度。SEM显示添加木炭后孔隙率增加。复合材料的热性能和结晶度不受制造方法或木炭浓度变化的显著影响。FTIR分析确定了特征峰，而TGA表明在400至500°C之间有质量损失，最大分解温度为487°C。XRD证实了HDPE典型的半结晶结构。因此，掺入木炭残渣可以减少化石基材料的使用，同时为工业废料提供可持续的应用。
