搅拌摩擦加工制备MWCNTs增强PE-HD的结构与性能研究

摘要

High-density polyethylene (PE-HD)/multiwalled carbon nanotubes (MWCNTs) composites are prepared through a friction stir processing method.The effect of traverse speeds on macro-and micro-structures and tensile strength of the composite was investigated.The results indicated that the composite layers exhibited a smooth surface without any defects.MWCNTs were uniformly dispersed in the matrix in a cloudy form.The lower traverse favors the separation and dispersion of MWCNTs in the matrix.The tensile strength exhibited a trend of increase at first and decrease afterwards with an increase of traverse speed,and a maximum value was achieved at the traverse speed of 30 mm/min.%通过搅拌摩擦加工技术制备了多壁碳纳米管(MWCNTs)增强高密度聚乙烯复合材料,并研究了行进速度对复合材料宏观、微观结构和拉伸强度的影响.结果表明,复合改性层的宏观表面光滑,且缺陷较少;MWCNTs在基体中以云状形式分布,组织相对均匀;较低的行进速度更有利于MWCNTs在基体中的分散;复合材料的拉伸强度随着行进速度的增加先升高后降低,在行进速度为30 mm/min时取得最大值.