Stretchable PEDOT:PSS/Li-TFSI/XSB Composite Films for Electromagnetic Interference Shielding,ACS Applied Materials & Interfaces

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Stretchable PEDOT:PSS/Li-TFSI/XSB Composite Films for Electromagnetic Interference Shielding
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-02-06 , DOI: 10.1021/acsami.2c21604
Xin Jiang ₁ , Junwei Zhou ₁ , Xinke Zhong ₁ , Zhaopeng Hu ₁ , Rongyan Hu ₁ , Yihu Song _{1,

2} , Qiang Zheng _{1,

2}

Affiliation

Electromagnetic interference (EMI) shielding materials with stretchability are important for developing wearable and flexible appliances. Herein, lithium bis(trifloromethanesulfonyl)imide (Li-TFSI)-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and carboxylated styrene-butadiene rubber (XSB) latex are used to prepare stretchable EMI shielding composite films of 0.2 mm in thickness. In these films, the doped PEDOT:PSS nanoparticles form tenuous conductive pathways between the hexagonally packed latex particles, resulting in higher EMI shielding efficiency (EMI SE) compared with the films containing traditional dopant ethylene glycol. For the purpose of stretchable EMI shielding, the films containing 6 wt % PEDOT:PSS and 6 wt % Li-TFSI demonstrate EMI SE of 50 and 30 dB (12.4 GHz) at 0 and 100% strains, respectively, being the highest values among the reported shielding composites except for those using liquid metal as the filler. The investigation also provides a simple and environmentally friendly preparation method being highlighted for the development of lightweight stretchable EMI shielding materials for applications in flexible electronics in the near future.

中文翻译：

用于电磁干扰屏蔽的可拉伸 PEDOT:PSS/Li-TFSI/XSB 复合薄膜

具有可拉伸性的电磁干扰 (EMI) 屏蔽材料对于开发可穿戴和柔性设备非常重要。在此，双（三氟甲磺酰基）亚胺锂（Li-TFSI）掺杂的聚（3,4-乙烯二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）和羧化苯乙烯 - 丁二烯橡胶（XSB）乳胶用于制备可拉伸的EMI屏蔽厚度为 0.2 mm 的复合薄膜。在这些薄膜中，掺杂的 PEDOT:PSS 纳米粒子在六角形填充的乳胶粒子之间形成纤细的导电通路，与含有传统掺杂剂乙二醇的薄膜相比，具有更高的 EMI 屏蔽效率 (EMI SE)。出于可拉伸 EMI 屏蔽的目的，含有 6 wt% PEDOT:PSS 和 6 wt% Li-TFSI 的薄膜在 0 和 100% 应变下分别表现出 50 和 30 dB (12.4 GHz) 的 EMI SE，是报道的屏蔽复合材料中的最高值，除了使用液态金属作为填料的那些。该研究还提供了一种简单且环保的制备方法，为在不久的将来开发用于柔性电子产品的轻质可拉伸 EMI 屏蔽材料提供了亮点。

更新日期：2023-02-06

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