材料科学
复合材料
抗弯强度
高密度聚乙烯
热重分析
极限抗拉强度
多孔性
差示扫描量热法
杨氏模量
聚乙烯
弯曲模量
生物炭
热解
化学
有机化学
物理
热力学
作者
Qingfa Zhang,Hang Xu,Wenyu Lu,Donghong Zhang,Xiajin Ren,Wenfan Yu,Juanjuan Wu,Liang Zhou,Xiangsheng Han,Weiming Yi,Hanwu Lei
标识
DOI:10.1016/j.scitotenv.2020.139770
摘要
Activated biochars (AB-0.5, AB-1, AB-1.5, AB-2) prepared under different concentrations of an activating agent were used to manufacturing composites (ABHC-0.5, ABHC-1, ABHC-1.5, ABHC-2) based on high-density polyethylene (HDPE) by compounding and injection molding. Thermal and mechanical properties of the composites were characterized and analyzed. The addition of activated biochars improved the thermal properties of HDPE shown by Differential scanning calorimetry and Thermogravimetric analysis. Additionally, ABHC-0.5 exhibited the best flexural strength (38.66 MPa), flexural modulus (2.46 GPa), tensile strength (32.17 MPa), tensile modulus (1.95 GPa), rigidity, elasticity, creep resistance, and anti-stress relaxation ability due to the best porous structure of AB-0.5. A decrease of mechanical properties was observed in ABHC-1, ABHC-1.5, ABHC-2 compared to ABHC-0.5, which was due to the fact that the porous structure was damaged by an excessive activating agent. The results of this study provided a predictive insight in view of optimizing process parameters and establishing the meaningful relationship between biochar porous structure and its resulting composites.
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