In this study, the effect of aspect ratio of graphene oxide (GO) on the properties of poly (vinyl alcohol) (PVA) nanocomposites were investigated. The PVA/GO nanocomposites were prepared by a simple solution casting method. GO with 3 different lateral sizes, 0.5, 1.5 and 3 µm were used. The higher the aspect ratio, the higher the Young’s modulus obtained. The effect of aspect ratio on Young’s modulus was in agreement with the Halpin-Tsai model, especially when GO was highly aligned in uniaxially drawn nanocomposites. Similar to the Young’s modulus, the barrier properties increased with increasing GO aspect ratio. On the other hand, the highest glass transition temperature as well as the highest thermal decomposition temperature was achieved for the GO of the lowest aspect ratio.

在这项研究中，研究了氧化石墨烯（GO）的纵横比对聚乙烯醇（PVA）纳米复合材料性能的影响。通过简单的溶液流延法制备PVA / GO纳米复合材料。GO使用3种不同的横向尺寸，分别为0.5、1.5和3 µm。长宽比越高，获得的杨氏模量越高。长径比对杨氏模量的影响与Halpin-Tsai模型一致，尤其是当GO在单轴拉伸纳米复合材料中高度对齐时。与杨氏模量相似，势垒性能随GO长宽比的增加而增加。另一方面，对于具有最低长径比的GO，获得了最高的玻璃化转变温度以及最高的热分解温度。