In this work, a novel nanocomposite is prepared via a melt blending of thermoplastic polyurethane (TPU) and Ti₃C₂T_x MXene nanosheets pretreated with polyethylene glycol. It is found that the tensile strength and elongation at break increased by 41.2% and 15.4% at MXene loading values of 0.5 wt%. The addition of MXene slightly increases the crystalline speed of TPU, and effectively hinders the transfer of small gas molecules at high temperatures. The storage modulus, loss modulus, and complex viscosity of TPU nanocomposites increase with the increasing MXene content at low frequency. The results demonstrate that the mechanical, thermal, and rheological properties of TPU nanocomposites can be effectively improved by MXene nanomaterials.

中文翻译：

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Ti3C2Tx MXene /热塑性聚氨酯纳米复合材料的机械，热和流变性能

在这项工作中，通过热塑性聚氨酯（TPU）和用聚乙二醇预处理的Ti ₃ C ₂ T _x MXene纳米片的熔融共混制备了一种新型的纳米复合材料。发现在0.5wt％的MXene负载值下，抗张强度和断裂伸长率分别增加了41.2％和15.4％。MXene的添加会稍微提高TPU的结晶速度，并有效地阻止高温下小气体分子的转移。在低频下，TPU纳米复合材料的储能模量，损耗模量和复数粘度随MXene含量的增加而增加。结果表明，MXene纳米材料可以有效地改善TPU纳米复合材料的力学，热学和流变性能。