Conductive Ink with Circular Life Cycle for Printed Electronics,Advanced Materials

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Conductive Ink with Circular Life Cycle for Printed Electronics
Advanced Materials ( IF 27.4 ) Pub Date : 2022-05-17 , DOI: 10.1002/adma.202202177
Junpyo Kwon _{1,

2} , Christopher DelRe _{2,

3} , Philjun Kang ₄ , Aaron Hall ₃ , Daniel Arnold ₅ , Ivan Jayapurna ₃ , Le Ma _{2,

3} , Matthew Michalek ₃ , Robert O Ritchie _{1,

2,

3} , Ting Xu _{2,

3,

4}

Affiliation

Electronic waste carries energetic costs and an environmental burden rivaling that of plastic waste due to the rarity and toxicity of the heavy-metal components. Recyclable conductive composites are introduced for printed circuits formulated with polycaprolactone (PCL), conductive fillers, and enzyme/protectant nanoclusters. Circuits can be printed with flexibility (breaking strain ≈80%) and conductivity (≈2.1 × 10⁴ S m⁻¹). These composites are degraded at the end of life by immersion in warm water with programmable latency. Approximately 94% of the functional fillers can be recycled and reused with similar device performance. The printed circuits remain functional and degradable after shelf storage for at least 7 months at room temperature and one month of continuous operation under electrical voltage. The present studies provide composite design toward recyclable and easily disposable printed electronics for applications such as wearable electronics, biosensors, and soft robotics.

中文翻译：

用于印刷电子产品的循环生命周期导电油墨

由于重金属成分的稀有性和毒性，电子废物具有与塑料废物相媲美的能源成本和环境负担。为印刷电路引入了可回收的导电复合材料，由聚己内酯 (PCL)、导电填料和酶/保护剂纳米簇组成。印刷电路具有柔韧性（断裂应变≈80%）和导电性（≈2.1 × 10 ⁴ S m ^-1）。这些复合材料在使用寿命结束时会因浸入具有可编程延迟的温水中而降解。大约 94% 的功能性填料可以回收再利用，具有相似的设备性能。印刷电路在室温下存放至少 7 个月并在电压下连续运行一个月后仍保持功能性和可降解性。目前的研究为可穿戴电子设备、生物传感器和软机器人等应用提供了可回收且易于丢弃的印刷电子产品的复合设计。

更新日期：2022-05-17

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