Properties evaluation of biochar/high-density polyethylene composites: Emphasizing the porous structure of biochar by activation

The Science of the Total Environment
Qingfa ZhangHanwu Lei

Abstract

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.

References

Nov 21, 2017·The Science of the Total Environment·Anesh Manjaly PouloseAjit K Sarmah
Mar 30, 2018·Environmental Management·Oisik DasDebes Bhattacharyya
Feb 12, 2019·The Science of the Total Environment·Sossina GezahegnYang Weimin

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Citations

Sep 10, 2020·Materials·Qingfa ZhangRoger Ruan

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