With the advancement of modern technology, target shooting machines are now widely used in military training, competitive sports, and recreation. However, they are prone to mechanical damage with frequent use. Moreover, low temperatures significantly degrade electronic signal transmission, reducing detection accuracy and user experience. To address this problem, we designed a low-temperature, self-healing, highly stretchable transparent polyurethane/cellulose nanofiber supramolecular elastomer (PUBES-H) that collaborates to integrate multiple hydrogen bonds and disulfide bonds in a self-developed bio-based polyurethane elastomer. PUBES-H exhibits excellent flexibility, with an elongation at break exceeding 1100 %. After 12 hours of self-healing at low temperatures (−10 ℃), the healing efficiency reaches up to 93 %. A low-temperature self-healing triboelectric nanogenerator (BS-TENG) was fabricated from PUBES-H using an interfacial self-healing process. The output voltage remained stable at 24 V under low temperatures, after self-healing (−10 ℃, 12 h), and following 3600 cycles of testing (−30 ℃). Additionally, a self-healing wireless intelligent target shooter based on the BS-TENG was developed to enhance durability in complex environments.

中文翻译：

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用于无线智能目标系统的高性能低温自修复生物基聚氨酯摩擦纳米发电机


随着现代技术的进步，打靶机现在被广泛用于军事训练、竞技运动和娱乐。但是，频繁使用容易发生机械损坏。此外，低温会显著降低电子信号传输质量，从而降低检测精度和用户体验。为了解决这个问题，我们设计了一种低温、自修复、高拉伸的透明聚氨酯/纤维素纳米纤维超分子弹性体 （PUBES-H），它协同将多个氢键和二硫键整合到自主开发的生物基聚氨酯弹性体中。PUBES-H 表现出优异的柔韧性，断裂伸长率超过 1100 %。在低温 （-10 °C） 下自我修复 12 小时后，愈合效率高达 93%。以 PUBES-H 为原料，采用界面自愈工艺制备了低温自愈摩擦纳米发电机 （BS-TENG）。在低温下、自愈后（-10 °C，12 h）和 3600 次循环测试 （-30 °C），输出电压在 24 V 时保持稳定。此外，还开发了一种基于 BS-TENG 的自愈式无线智能目标射击器，以提高复杂环境下的耐用性。