Influence of CNT Mass Fractions and Diameters On the Microstructures and Mechanical Properties of CNT/HDPE Composites
Carbon nanotubes(CNT)play a significant role in the CNT/high density polyethylene(HDPE)composites.This study investigated the influence mechanisms of CNT mass fractions and diameters on the microstructures of the composite materials by testing crystallinity,impact strength,and tensile strength.The results indicate that altering the CNT mass fractions could enhance the crystallinity,impact strength,and tensile strength of the composite materials.The impact strength of 0.2%CNT/HDPE(53.1 kJ/m2)is 68.57%higher than that of HDPE(31.5 kJ/m2);the crystallinity of 0.6%CNT/HDPE(52.15%)is 40.57%higher than that of HDPE(37.1%);the tensile strength of 0.8%CNT/HDPE(25.97 MPa)is 36.68%higher than that of HDPE(19 MPa).After the introduction of CNT,the impact strengths of composite materials are lower than that of HDPE,but the crystallinity and tensile strength of the composite materials enhance.The crystallinity(56.77%)of D5CNT/HDPE with a CNT diameter of 4-6 nm is 53.01%higher than that of HDPE(37.1%).The tensile strengths of the composite materials are not significantly improved by changing the CNT diameters.This study improved the impact and tensile properties of CNT/HDPE composite materials by adjusting the CNT mass fractions and diameters,providing theoretical guidance for the preparation of high-performance CNT/HDPE composite materials.
Carbon NanotubeHigh Density PolyethyleneStructureMechanical Property
NETL
NSTL
万方数据
