钛酸酯偶联剂表面改性煤矸石粉的研究

Study on Surface Modification of Coal Gangue Powder by Titanate Coupling Agent

通过XRD与SEM研究了经钛酸酯偶联剂改性的煤矸石粉的表面性质、微观结构和改性粉体与HDPE的结合情况,通过力学性能实验分析了改性剂对煤矸石粉(CGP)填充高密度聚乙烯(HDPE)复合材料的影响。研究表明:改性后的CGP表面由亲水变成亲油;SEM照片显示改性后CGP与HDPE相容性好;力学性能测试表明改性粉体明显改善了复合材料的力学性能,当填充量为30%时弯曲强度提高了71.7%,拉伸强度提高了19.3%。文章还探讨了钛酸酯偶联剂改性煤矸石粉的机理。

Based on the methods of XRD and SEM,the surface performance,microstructure and modified powder of the Coal Gangue Powder（CGP） modified by Titanate Coupling Agent are studied,and the effect of the CGP is analyzed after modification on the mechanical performance of high-density polyethylene（HDPE） composite materials.The modified CGP changed from hydrophilic to lipophilic in the experiment of mechanical property;the SEM photographs also shows that the modified CGP has good compatibility with HDPE;the mechanical test shows that the modified powder has significantly improved the mechanical performance of composite materials.When the filler content is 30%,the flexural strength increases 71.7%,and the tensile strength also increases 19.3%.The mechanism of coal gangue powder modified by titanate coupling agent is also described.