Department of Chemical Technologies, Iranian Research Organization for Science and Technology, PO Box 15815-3538, Tehran, Iran.
Carbohydr Polym. 2013 Jan 30;92(1):865-71. doi: 10.1016/j.carbpol.2012.10.010. Epub 2012 Oct 12.
This article presents the preparation and characterization of bagasse/high density polyethylene (HDPE) composites. The effects of multi-walled carbon nanotubes (MWCNTs), as reinforcing agent, on the mechanical and physical properties were also investigated. In order to increase the interphase adhesion, maleic anhydride grafted polyethylene (MAPE) was added as a coupling agent to all the composites studied. In the sample preparation, MWCNTs and MAPE contents were used as variable factors. The morphology of the specimens was characterized using scanning electron microscopy (SEM) technique. The results of strength measurement indicated that when 1.5 wt% MWCNTs were added, tensile and flexural properties reached their maximum values. At high level of MWCNTs loading (3 or 4 wt%), increased population of MWCNTs lead to agglomeration and stress transfer gets blocked. The addition of MWCNTs filler slightly decreased the impact strength of composites. Both mechanical and physical properties were improved when 4 wt% MAPE was applied. SEM micrographs also showed that the surface roughness improved with increasing MAPE loading from 0 to 4 wt%. The improvement of physicomechanical properties of composites confirmed that MWCNTs have good reinforcement and the optimum synergistic effect of MWCNTs and MAPE was achieved at the combination of 1.5 and 4 wt%, respectively.
本文介绍了蔗渣/高密度聚乙烯（HDPE）复合材料的制备和表征。还研究了多壁碳纳米管（MWCNTs）作为增强剂对其力学和物理性能的影响。为了提高界面附着力，所有研究的复合材料中都添加了马来酸酐接枝聚乙烯（MAPE）作为偶联剂。在样品制备中，MWCNTs 和 MAPE 的含量作为变量因素。使用扫描电子显微镜（SEM）技术对样品的形貌进行了表征。强度测量的结果表明，当添加 1.5wt%的 MWCNTs 时，拉伸和弯曲性能达到最大值。在高 MWCNTs 负载水平（3 或 4wt%）下，MWCNTs 的增加会导致团聚，从而阻碍了应力传递。MWCNTs 填料的添加会略微降低复合材料的冲击强度。当添加 4wt%的 MAPE 时，两种力学性能和物理性能都得到了提高。SEM 显微照片还表明，随着 MAPE 负载量从 0 增加到 4wt%，表面粗糙度得到了提高。复合材料的物理机械性能的提高证实了 MWCNTs 具有良好的增强作用，MWCNTs 和 MAPE 的最佳协同效应分别在 1.5wt%和 4wt%的组合下实现。
