Palabiyik Mehmet, Aydin Serhat, Senturk Oguzkan
Faculty of Mechanical Engineering, Istanbul Technical University, Istanbul 34437, Turkey.
GE Vernova Grid Solutions, Gebze 41410, Turkey.
Polymers (Basel). 2025 Apr 27;17(9):1186. doi: 10.3390/polym17091186.
This study investigated the mechanical, fatigue, and creep properties of polyamide 6 (PA6)/graphene oxide (GO) nanocomposites manufactured by a combination of melt and solvent mixing. Results showed that increasing GO content improved tensile and bending properties and reduced temperature dependence. The tensile modulus and strength of PA6/GO nanocomposite containing 1 wt.% GO (PA6 + 1GO) were measured with an increment of 33% and 37%, respectively, compared with neat PA6. The reduction in tensile strength occurred gradually with the increasing amount of GO. As the temperature increased from 25 °C to 70 °C, the tensile strength of PA6 and PA6 + 1GO decreased by 20% and 4%, respectively. Fatigue tests demonstrated that the rigid GO particles hindered the deformation capability of the matrix and facilitated crack propagation. While the PA6 reached 10 cycles at 60% of its tensile strength, PA6 + 1GO was able to reach 10 cycles at 35% of its tensile strength. Dynamic mechanical analysis (DMA) revealed that GO enhanced both storage modulus and glass transition temperature (T). Creep tests demonstrated better deformation resistance under stress in PA6/GO nanocomposites compared to pure PA6. After a 10 h creep test, the decrease in creep strain was observed as 52.4% for PA6 + 1GO.
本研究调查了通过熔融和溶剂混合相结合的方法制备的聚酰胺6（PA6）/氧化石墨烯（GO）纳米复合材料的力学、疲劳和蠕变性能。结果表明，增加GO含量可改善拉伸和弯曲性能，并降低温度依赖性。与纯PA6相比，含1 wt.% GO的PA6/GO纳米复合材料（PA6 + 1GO）的拉伸模量和强度分别提高了33%和37%。随着GO含量的增加，拉伸强度逐渐降低。当温度从25℃升高到70℃时，PA6和PA6 + 1GO的拉伸强度分别降低了20%和4%。疲劳试验表明，刚性的GO颗粒阻碍了基体的变形能力并促进了裂纹扩展。当PA6在其拉伸强度的60%下达到10次循环时，PA6 + 1GO在其拉伸强度的35%下就能达到10次循环。动态力学分析（DMA）表明，GO提高了储能模量和玻璃化转变温度（T）。蠕变试验表明，与纯PA6相比，PA6/GO纳米复合材料在应力作用下具有更好的抗变形能力。经过10小时的蠕变试验后，PA6 + 1GO的蠕变应变降低了52.4%。
