Due to the damages caused during deformation of flexible electronic materials, the development of self-healing flexible electronic materials has received great attention. A self-healing flexible polyurethane nanocomposite obtained by the incorporation of carbon nanotubes (CNTs) is reported. The structure and self-healing properties of the nanocomposite were investigated by thermal analysis, tensile test and observation of surface morphology. After the introduction of CNTs, the tensile strength at break was improved from 1.45 MPa to 2.99 MPa as the loading content of CNTs was 5 wt%. The elongation at break decreased but still remained above 100%, indicating the composite was flexible enough for flexible and wearable electronics. Due to the photo-thermal effect of CNTs, the self-healing of the nanocomposite could be induced precisely, remotely and efficiently under irradiation of near infrared (NIR) laser without influencing the undamaged areas. The healing efficiency of the composite containing 3 wt% CNTs reached 90.1%. Besides, the nanocomposite could assist the recovery of the conductive layer coated on its surface under irradiation. Therefore, the polyurethane nanocomposite could be safely utilized as the flexible substrate for conductive layer of flexible electronics.

由于柔性电子材料变形过程中造成的损坏，自愈柔性电子材料的开发受到了广泛的关注。报道了通过掺入碳纳米管（CNT）获得的自修复的柔性聚氨酯纳米复合材料。通过热分析，拉伸试验和表面形貌观察研究了纳米复合材料的结构和自愈性能。引入CNT后，由于CNT的负载量为5重量％，断裂时的拉伸强度从1.45MPa提高到2.99MPa。断裂伸长率降低，但仍保持在100％以上，表明该复合材料具有足够的柔韧性，可用于挠性和可穿戴电子产品。由于CNT的光热效应，可以精确地诱导纳米复合材料的自愈，在不影响未损坏区域的情况下，在近红外（NIR）激光的照射下进行远程有效的处理。包含3wt％的CNT的复合材料的愈合效率达到90.1％。此外，纳米复合材料可以帮助在辐射下回收涂覆在其表面上的导电层。因此，聚氨酯纳米复合材料可以安全地用作柔性电子器件的导电层的柔性基板。