Improved mechanical performances of short aramid fiber‐reinforced polypropylene composites by Ti 3 C 2 Mxene nanosheets
Improved mechanical performances of short aramid fiber‐reinforced polypropylene composites by Ti 3 C 2 Mxene nanosheets
复制标题
DOI：
10.1002/pc.25953
复制
发表时间：
2021-01
影响因子：
5.2
通讯作者：
Bolin Tang;Yaru Yang;Yidi Shi;Hui‐Jie Nie;Hongqin Xia;Xiaojun Shen
中科院分区：
文献类型：
--
作者：
Bolin Tang;Yaru Yang;Yidi Shi;Hui‐Jie Nie;Hongqin Xia;Xiaojun Shen
纤维增强聚丙烯（PP）复合材料因其优异的机械性能而广泛应用于结构承载。因此，有必要提高纤维增强PP复合材料的力学性能。目前，二维Ti3C2Mxene纳米片与短芳纶纤维（SAF）结合，形成Ti3C2纳米片改性SAF（Ti3C2/SAF），旨在提高PP机械性能。经过氢氟酸蚀刻和超声分层程序后获得 Ti3C2 纳米片，然后化学结合到 H3PO4 溶液处理的 SAF 表面形成 Ti3C2/SAF。采用熔融共混法制备了Ti3C2/SAF增强PP（Ti3C2/SAF/PP）复合材料。扫描电镜图像显示，不同浓度Ti3C2纳米片溶液修饰的Ti3C2/SAF呈现出不同的形貌，其中0.3 mg/ml Ti3C2/SAF在SAF表面形成了相对均匀的Ti3C2纳米片涂层。力学性能测试结果表明Ti3C2/SAF/PP复合材料的拉伸和冲击强度显着提高。特别是5 wt%的0.3 Ti3C2/SAF/PP复合材料的最大拉伸强度和冲击强度达到37.8 MPa和14.0 kJ/m2，与SAF/PP复合材料（或PP基体）相比，拉伸强度提高了11.5%（或28.1%），冲击强度提高了12.9%（或38.6%）。这可以归因于Ti3C2纳米片与SAF的结合提高了SAF和PP之间的界面结合强度。这项工作为提高纤维增强聚丙烯复合材料的机械性能提供了一种有前景的策略。
Fiber‐reinforced polypropylene (PP) composites are widely used for structural bearing because of their excellent mechanical property. So, it is necessary to improve the mechanical property of fiber‐reinforced PP composites. In this present, two‐dimensional Ti3C2Mxene nanosheets were bound to short aramid fiber (SAF), forming Ti3C2nanosheets‐modified SAF (Ti3C2/SAF), aiming to improve PP mechanical property. The Ti3C2nanosheets were obtained after hydrofluoric acid etching and ultrasonically delamination procedure, followed by chemically bound to the surface of H3PO4solution‐treated SAF to form Ti3C2/SAF. The Ti3C2/SAF‐reinforced PP (Ti3C2/SAF/PP) composites were prepared by a melt blending method. Scanning electron microscopy images showed that the Ti3C2/SAF modified with different concentration of Ti3C2nanosheets solution presented the distinct morphologies, with the 0.3 mg/ml Ti3C2/SAF formed a relatively uniform Ti3C2nanosheets coating on the SAF surface. Test results of mechanical performance indicated that the tensile and impact strength of Ti3C2/SAF/PP composites were significantly improved. Especially, the maximum tensile and impact strength of 0.3 Ti3C2/SAF/PP composite at 5 wt% reached to 37.8 MPa and 14.0 kJ/m2, which was increased by 11.5% (or 28.1%) in tensile strength and 12.9% (or 38.6%) in impact strength, compared with that of SAF/PP composite (or PP matrix). This can be attributed that Ti3C2nanosheets binding to SAF improved the interfacial bonding strength between SAF and PP. This work provides a promising strategy for improving the mechanical properties of fiber‐reinforced PP composites.