Eco-friendly screen printing of silver nanowires for flexible and stretchable electronics
Eco-friendly screen printing of silver nanowires for flexible and stretchable electronics
复制标题
用于柔性和可拉伸电子产品的银纳米线的环保丝网印刷
DOI：
10.1039/d2nr05840e
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发表时间：
2023
期刊：
影响因子：
6.7
通讯作者：
Zhu, Yong
中科院分区：
文献类型：
--
作者：
Shukla, Darpan;Liu, Yuxuan;Zhu, Yong
丝网印刷是实现高通量印刷电子产品的一条很有前途的途径。目前，基于纳米材料的导电油墨的制备涉及复杂的配方，通常在油墨成分中含有有毒的表面活性剂，这使得它们不适合作为环保印刷技术。这项工作报道了银纳米线（AgNW）油墨的发展，其导电颗粒负载相对较低，为7 wt%。AgNW油墨配方简单，由一种可生物降解的粘合剂和一种绿色溶剂组成，油墨配方中不含有毒表面活性剂，使其成为一种环保印刷工艺。该配方油墨适用于各种基材上的印刷，如聚二甲基硅氧烷（PDMS）、聚对苯二甲酸乙二醇酯（PET）、聚酰亚胺（PI）胶带、玻璃和纺织品。通过调整油墨的流变特性和开发一步印刷后工艺，实现了50 μm的最小特征尺寸和高达6.70 × 106 S m−1的电导率。使用较低的150℃退火温度使得该工艺适用于塑料基板。利用所报道的AgNW墨水制作了柔性纺织品加热器和可穿戴水合传感器，以证明其在可穿戴电子应用中的潜力。
Screen printing is a promising route towards high throughput printed electronics. Currently, the preparation of nanomaterial based conductive inks involves complex formulations with often toxic surfactants in the ink's composition, making them unsuitable as an eco-friendly printing technology. This work reports the development of a silver nanowire (AgNW) ink with a relatively low conductive particle loading of 7 wt%. The AgNW ink involves simple formulation and comprises a biodegradable binder and a green solvent with no toxic surfactants in the ink formulation, making it an eco-friendly printing process. The formulated ink is suitable for printing on a diverse range of substrates such as polydimethylsiloxane (PDMS), polyethylene terephthalate (PET), polyimide (PI) tape, glass, and textiles. By tailoring the rheological behaviour of the ink and developing a one-step post-printing process, a minimum feature size of 50 μm and conductivity as high as 6.70 × 106 S m−1 was achieved. Use of a lower annealing temperature of 150 °C makes the process suitable for plastic substrates. A flexible textile heater and a wearable hydration sensor were fabricated using the reported AgNW ink to demonstrate its potential for wearable electronic applications.