Exploring the influence of native minerals in coal gangue on CG/PE composite manufacturing and performance: Examining SiO₂'s role in interfacial compatibility

This study delves into the influence of inherent minerals within coal gangue (CG) on the preparation and performance of coal gangue /polyethylene (CG/PE) composites, focusing on the role of SiO 2 in interfacial compatibility. A systematic examination unveils the consequences of varying SiO 2 content on physical, mechanical, thermal, and microstructural attributes of the composites. SiO 2 incorporation significantly improves physical properties, boosting density and hardness but impacting tensile strength negatively. It enhances bending strength and modulus while diminishing tensile strength. Judicious SiO 2 addition enhances thermal stability, but excess SiO 2 may compromise thermal decomposition. Microstructural analysis, including SEM and FTIR, elucidates SiO 2 ‐PE interactions, primarily through physical entanglement. SiO 2 introduction promotes more ordered PE molecular chain arrangements, elevating composite crystallinity. In summary, this study provides in‐depth insights into SiO 2 's mechanistic impact on CG/PE composite properties, laying a robust foundation for designing environmentally friendly composites. These findings hold promise for advancing sustainable materials science and engineering. Future research may explore SiO 2 optimization for specific applications and synergistic effects with other fillers in composites. Highlights SiO 2 greatly improves the properties of CG/PE composites with detailed exploration. Reveals the specific SiO 2 ‐PE interaction mechanism for a better comprehension. Performs structural analysis via XRD with valuable findings presented. Promotes pioneering advancements in eco‐friendly materials with broad significance.