Oriented polylactic acid (PLA)/graphene oxide (GO) nanosheets tapes were prepared via uniaxial solid state drawing. The effect of various drawing conditions, including drawing ratio (DR), temperature (DT), and speed (DS) on mechanical, thermal, structural, and barrier properties were studied. Structural studies showed oriented structure for the drawn tapes with aligned polymer chains and GO nanosheets. Differential scanning calorimetry revealed improved glass transition temperature (T_g) and crystallinity (X_c) after drawing. In addition, T_g and X_c were increased more by increasing DR and DT. The highest T_g and X_c were achieved for 3/70/50 tape with values of 73°C and %22, respectively. Higher thermal stabilities and enhanced barrier properties were achieved after drawing, especially at the higher DR. Finally, tensile testing revealed simultaneous improvement in stiffness and toughness due to strain hardening for all the drawn tapes. The strength and elastic modulus were increased after increasing DR, DS, and DT and reached the highest values of 149 MPa and 3.6 GPa for 3/70/50. Overall, the properties were controllable by the processing conditions.

通过单轴固态拉伸制备定向聚乳酸（PLA）/氧化石墨烯（GO）纳米片带。研究了各种拉伸条件，包括拉伸比 (DR)、温度 (DT) 和速度 (DS) 对机械、热、结构和阻隔性能的影响。结构研究表明，拉伸带具有排列的聚合物链和 GO 纳米片的定向结构。差示扫描量热法显示拉伸后玻璃化转变温度(T _g )和结晶度(X _c )提高。此外，通过增加 DR 和 DT ，T _g和 X _c增加得更多。最高的 T _g和 X _c3/70/50 胶带的温度分别为 73°C 和 %22。拉伸后实现了更高的热稳定性和增强的阻隔性能，尤其是在更高的 DR 下。最后，拉伸试验表明，由于所有拉制带的应变硬化，刚度和韧性同时提高。增加 DR、DS 和 DT 后，强度和弹性模量增加，并在 3/70/50 时达到最高值 149 MPa 和 3.6 GPa。总体而言，性能可通过加工条件控制。