纳米CaCO_(3)/BF对PE复合材料性能影响

Effect of Nano-CaCO_(3)/BF on Properties of PE Composites

以聚乙烯(PE)为基体,纳米碳酸钙(纳米CaCO_(3))为填充物,甘蔗渣纤维(BF)为增强体,挤出制备PE/纳米CaCO_(3)/BF复合材料。通过力学性能测试和傅里叶变换红外光谱、X射线衍射、扫描电子显微镜、热重等表征方法,探究纳米CaCO_(3)和BF添加量对PE复合材料结构和性能的影响。结果表明,在纳米CaCO_(3)质量分数为15%,BF质量分数为10%的条件下,PE/纳米CaCO_(3)/BF复合材料拉伸强度和缺口冲击强度达到最佳,分别较纯PE提高了27.15%和6.44%;加入纳米CaCO_(3)和BF后,复合材料没有产生新的化学键;适量的纳米CaCO_(3)和BF使复合材料的韧性和相容性得到有效改善,从而提高了复合材料的力学性能;纳米CaCO_(3)的加入会影响复合材料的结晶度,但会使材料的热稳定性得到明显提高。该材料可作为生产钙塑包装箱的专用材料,降低了钙塑包装箱的成本,使包装材料的强度、韧性等力学性能得到明显改善。

Taking polyethylene(PE)as matrix,nano-calcium carbonate(nano-CaCO_(3))as filler and bagasse fiber(BF)as reinforcement,PE/nano-CaCO_(3)/BF composites were prepared by extrusion.The mechanical properties of the composites were tested and the composites were characterized by Fourier transform infrared spectrum,X-ray diffraction,scanning electron microscope and thermogravimetric(TG)analysis.The effects of nano-CaCO_(3) and BF addition on the structure and properties of the PE composites were explored.The results show that the tensile strength and notched impact strength of PE/nano-CaCO_(3)/BF composite are the best under the conditions of 15 wt%nano-CaCO_(3) and 10 wt%BF,which are increased by 27.15%and 6.44%compared with that of pure PE.There is no new chemical bond in the composite after adding nano-CaCO_(3) and BF.The toughness and compatibility of the composites are improved effectively with proper nano-CaCO_(3) and BF,thus the mechanical properties of the composites are improved.The addition of nano-CaCO_(3) can affect the crystallinity of the composite,while the thermal stability of the composite is significantly improved.The composite can be used as a special material for the production of calcium plastic packing box,which can reduce the cost of calcium plastic packing box and improve the mechanical properties such as strength,toughness of the packing materials obviously.